/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 21:17:05,718 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 21:17:05,720 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 21:17:05,764 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 21:17:05,833 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 21:17:05,851 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 21:17:05,851 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 21:17:05,852 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 21:17:05,852 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 21:17:05,853 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 21:17:05,853 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 21:17:05,853 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 21:17:05,853 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 21:17:05,853 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 21:17:05,854 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 21:17:05,854 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 21:17:05,854 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 21:17:05,854 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 21:17:05,854 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 21:17:05,854 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 21:17:05,854 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 21:17:05,854 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 21:17:05,855 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 21:17:05,855 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 21:17:05,855 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 21:17:05,855 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 21:17:05,855 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 21:17:05,855 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 21:17:05,855 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 21:17:05,856 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 21:17:05,856 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 21:17:05,856 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 21:17:05,856 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 21:17:05,856 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 21:17:05,856 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 21:17:05,856 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 21:17:05,856 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 21:17:06,137 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 21:17:06,158 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 21:17:06,161 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 21:17:06,162 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 21:17:06,163 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 21:17:06,164 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-2.wvr.bpl [2021-06-05 21:17:06,164 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-2.wvr.bpl' [2021-06-05 21:17:06,214 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 21:17:06,216 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 21:17:06,217 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 21:17:06,217 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 21:17:06,217 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 21:17:06,229 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:17:06" (1/1) ... [2021-06-05 21:17:06,238 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:17:06" (1/1) ... [2021-06-05 21:17:06,245 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 21:17:06,246 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 21:17:06,247 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 21:17:06,248 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 21:17:06,253 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:17:06" (1/1) ... [2021-06-05 21:17:06,253 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:17:06" (1/1) ... [2021-06-05 21:17:06,254 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:17:06" (1/1) ... [2021-06-05 21:17:06,254 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:17:06" (1/1) ... [2021-06-05 21:17:06,256 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:17:06" (1/1) ... [2021-06-05 21:17:06,258 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:17:06" (1/1) ... [2021-06-05 21:17:06,259 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:17:06" (1/1) ... [2021-06-05 21:17:06,260 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 21:17:06,261 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 21:17:06,261 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 21:17:06,262 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 21:17:06,264 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:17:06" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 21:17:06,348 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 21:17:06,349 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 21:17:06,349 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 21:17:06,349 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 21:17:06,349 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 21:17:06,349 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 21:17:06,350 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 21:17:06,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 21:17:06,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 21:17:06,351 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 21:17:06,544 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 21:17:06,544 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-05 21:17:06,545 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-06-05 21:17:06,545 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-06-05 21:17:06,546 INFO L202 PluginConnector]: Adding new model unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 09:17:06 BoogieIcfgContainer [2021-06-05 21:17:06,547 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 21:17:06,548 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 21:17:06,548 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 21:17:06,551 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 21:17:06,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:17:06" (1/2) ... [2021-06-05 21:17:06,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3977d01 and model type unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 09:17:06, skipping insertion in model container [2021-06-05 21:17:06,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 09:17:06" (2/2) ... [2021-06-05 21:17:06,553 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-2.wvr.bpl [2021-06-05 21:17:06,560 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 21:17:06,560 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 21:17:06,560 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 21:17:06,561 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 21:17:06,618 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 21:17:06,653 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 21:17:06,679 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 21:17:06,679 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 21:17:06,679 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 21:17:06,679 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 21:17:06,679 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 21:17:06,679 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 21:17:06,679 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 21:17:06,680 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 21:17:06,688 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 46 flow [2021-06-05 21:17:06,696 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:06,697 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:06,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-06-05 21:17:06,702 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:06,702 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:06,703 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:06,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:06,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1694861722, now seen corresponding path program 1 times [2021-06-05 21:17:06,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:06,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299552495] [2021-06-05 21:17:06,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:06,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:06,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:06,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:06,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299552495] [2021-06-05 21:17:06,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299552495] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:17:06,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:17:06,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 21:17:06,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398373588] [2021-06-05 21:17:06,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 21:17:06,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:06,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 21:17:06,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 21:17:06,881 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:06,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:06,922 INFO L93 Difference]: Finished difference Result 22 states and 38 transitions. [2021-06-05 21:17:06,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 21:17:06,924 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-06-05 21:17:06,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:06,931 INFO L225 Difference]: With dead ends: 22 [2021-06-05 21:17:06,931 INFO L226 Difference]: Without dead ends: 19 [2021-06-05 21:17:06,932 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 21:17:06,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-06-05 21:17:06,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-06-05 21:17:06,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:06,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 33 transitions. [2021-06-05 21:17:06,958 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 33 transitions. Word has length 9 [2021-06-05 21:17:06,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:06,958 INFO L482 AbstractCegarLoop]: Abstraction has 19 states and 33 transitions. [2021-06-05 21:17:06,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:06,959 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 33 transitions. [2021-06-05 21:17:06,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 21:17:06,959 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:06,959 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:06,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 21:17:06,960 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:06,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:06,960 INFO L82 PathProgramCache]: Analyzing trace with hash 658584646, now seen corresponding path program 1 times [2021-06-05 21:17:06,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:06,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270435291] [2021-06-05 21:17:06,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:06,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:06,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:06,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:06,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270435291] [2021-06-05 21:17:06,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270435291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:06,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802386278] [2021-06-05 21:17:06,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:07,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:07,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 21:17:07,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:07,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:07,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802386278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:07,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:07,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-06-05 21:17:07,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785517049] [2021-06-05 21:17:07,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 21:17:07,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:07,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 21:17:07,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:17:07,110 INFO L87 Difference]: Start difference. First operand 19 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:07,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:07,154 INFO L93 Difference]: Finished difference Result 28 states and 45 transitions. [2021-06-05 21:17:07,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 21:17:07,155 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 21:17:07,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:07,156 INFO L225 Difference]: With dead ends: 28 [2021-06-05 21:17:07,156 INFO L226 Difference]: Without dead ends: 28 [2021-06-05 21:17:07,160 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:17:07,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-06-05 21:17:07,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2021-06-05 21:17:07,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:07,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 35 transitions. [2021-06-05 21:17:07,171 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 35 transitions. Word has length 10 [2021-06-05 21:17:07,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:07,171 INFO L482 AbstractCegarLoop]: Abstraction has 19 states and 35 transitions. [2021-06-05 21:17:07,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:07,172 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 35 transitions. [2021-06-05 21:17:07,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 21:17:07,173 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:07,174 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:07,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 21:17:07,389 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:07,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:07,390 INFO L82 PathProgramCache]: Analyzing trace with hash -978034129, now seen corresponding path program 1 times [2021-06-05 21:17:07,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:07,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430834059] [2021-06-05 21:17:07,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:07,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:07,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:07,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:07,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430834059] [2021-06-05 21:17:07,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430834059] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:17:07,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:17:07,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 21:17:07,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468471493] [2021-06-05 21:17:07,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 21:17:07,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:07,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 21:17:07,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:17:07,435 INFO L87 Difference]: Start difference. First operand 19 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:07,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:07,466 INFO L93 Difference]: Finished difference Result 22 states and 36 transitions. [2021-06-05 21:17:07,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 21:17:07,467 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 21:17:07,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:07,467 INFO L225 Difference]: With dead ends: 22 [2021-06-05 21:17:07,467 INFO L226 Difference]: Without dead ends: 18 [2021-06-05 21:17:07,468 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:17:07,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-06-05 21:17:07,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-06-05 21:17:07,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:07,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 31 transitions. [2021-06-05 21:17:07,471 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 31 transitions. Word has length 10 [2021-06-05 21:17:07,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:07,471 INFO L482 AbstractCegarLoop]: Abstraction has 18 states and 31 transitions. [2021-06-05 21:17:07,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:07,471 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 31 transitions. [2021-06-05 21:17:07,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 21:17:07,472 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:07,472 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:07,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 21:17:07,472 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:07,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:07,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1576587559, now seen corresponding path program 2 times [2021-06-05 21:17:07,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:07,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531286229] [2021-06-05 21:17:07,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:07,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:07,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:07,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:07,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531286229] [2021-06-05 21:17:07,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531286229] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:17:07,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:17:07,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 21:17:07,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514267924] [2021-06-05 21:17:07,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 21:17:07,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:07,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 21:17:07,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:17:07,504 INFO L87 Difference]: Start difference. First operand 18 states and 31 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:07,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:07,522 INFO L93 Difference]: Finished difference Result 20 states and 35 transitions. [2021-06-05 21:17:07,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 21:17:07,523 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 21:17:07,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:07,525 INFO L225 Difference]: With dead ends: 20 [2021-06-05 21:17:07,525 INFO L226 Difference]: Without dead ends: 20 [2021-06-05 21:17:07,525 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:17:07,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-06-05 21:17:07,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-06-05 21:17:07,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:07,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2021-06-05 21:17:07,534 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2021-06-05 21:17:07,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:07,534 INFO L482 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2021-06-05 21:17:07,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:07,535 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2021-06-05 21:17:07,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 21:17:07,535 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:07,535 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:07,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 21:17:07,536 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:07,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:07,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1035640753, now seen corresponding path program 1 times [2021-06-05 21:17:07,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:07,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804942544] [2021-06-05 21:17:07,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:07,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:07,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:07,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:07,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804942544] [2021-06-05 21:17:07,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804942544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:07,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925478410] [2021-06-05 21:17:07,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:07,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:07,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 21:17:07,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:07,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:07,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925478410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:07,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:07,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-06-05 21:17:07,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530492022] [2021-06-05 21:17:07,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 21:17:07,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:07,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 21:17:07,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:17:07,695 INFO L87 Difference]: Start difference. First operand 20 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:07,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:07,718 INFO L93 Difference]: Finished difference Result 24 states and 43 transitions. [2021-06-05 21:17:07,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 21:17:07,719 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 21:17:07,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:07,720 INFO L225 Difference]: With dead ends: 24 [2021-06-05 21:17:07,720 INFO L226 Difference]: Without dead ends: 24 [2021-06-05 21:17:07,721 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:17:07,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-06-05 21:17:07,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-06-05 21:17:07,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:07,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 43 transitions. [2021-06-05 21:17:07,728 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 43 transitions. Word has length 11 [2021-06-05 21:17:07,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:07,728 INFO L482 AbstractCegarLoop]: Abstraction has 24 states and 43 transitions. [2021-06-05 21:17:07,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:07,728 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 43 transitions. [2021-06-05 21:17:07,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 21:17:07,729 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:07,729 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:07,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:07,945 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:07,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:07,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1473521199, now seen corresponding path program 2 times [2021-06-05 21:17:07,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:07,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425546920] [2021-06-05 21:17:07,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:07,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:08,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:08,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:08,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425546920] [2021-06-05 21:17:08,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425546920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:08,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832963231] [2021-06-05 21:17:08,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:08,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:17:08,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:08,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:17:08,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:08,170 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:17:08,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-06-05 21:17:08,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:17:08,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:17:08,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:17:08,179 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-06-05 21:17:08,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:08,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832963231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:08,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:08,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-06-05 21:17:08,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560481238] [2021-06-05 21:17:08,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:17:08,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:08,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:17:08,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:17:08,197 INFO L87 Difference]: Start difference. First operand 24 states and 43 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:08,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:08,242 INFO L93 Difference]: Finished difference Result 54 states and 96 transitions. [2021-06-05 21:17:08,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:17:08,243 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 21:17:08,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:08,245 INFO L225 Difference]: With dead ends: 54 [2021-06-05 21:17:08,245 INFO L226 Difference]: Without dead ends: 51 [2021-06-05 21:17:08,246 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 63.4ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:17:08,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-06-05 21:17:08,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2021-06-05 21:17:08,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 2.121212121212121) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:08,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 70 transitions. [2021-06-05 21:17:08,256 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 70 transitions. Word has length 12 [2021-06-05 21:17:08,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:08,257 INFO L482 AbstractCegarLoop]: Abstraction has 34 states and 70 transitions. [2021-06-05 21:17:08,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:08,258 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 70 transitions. [2021-06-05 21:17:08,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 21:17:08,259 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:08,259 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:08,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:08,473 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:08,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:08,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1077921553, now seen corresponding path program 3 times [2021-06-05 21:17:08,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:08,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53885892] [2021-06-05 21:17:08,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:08,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:08,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:08,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:08,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53885892] [2021-06-05 21:17:08,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53885892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:08,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975013282] [2021-06-05 21:17:08,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:08,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 21:17:08,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:08,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:17:08,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:08,591 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:17:08,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-06-05 21:17:08,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:17:08,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:17:08,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:17:08,596 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-06-05 21:17:08,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:08,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975013282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:08,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:08,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-06-05 21:17:08,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851712245] [2021-06-05 21:17:08,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:17:08,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:08,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:17:08,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:17:08,611 INFO L87 Difference]: Start difference. First operand 34 states and 70 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:08,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:08,638 INFO L93 Difference]: Finished difference Result 61 states and 117 transitions. [2021-06-05 21:17:08,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:17:08,638 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 21:17:08,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:08,639 INFO L225 Difference]: With dead ends: 61 [2021-06-05 21:17:08,639 INFO L226 Difference]: Without dead ends: 58 [2021-06-05 21:17:08,639 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 34.9ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:17:08,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-06-05 21:17:08,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 39. [2021-06-05 21:17:08,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:08,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 87 transitions. [2021-06-05 21:17:08,643 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 87 transitions. Word has length 12 [2021-06-05 21:17:08,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:08,644 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 87 transitions. [2021-06-05 21:17:08,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:08,644 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 87 transitions. [2021-06-05 21:17:08,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 21:17:08,644 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:08,644 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:08,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:08,868 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:08,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:08,869 INFO L82 PathProgramCache]: Analyzing trace with hash -452129241, now seen corresponding path program 4 times [2021-06-05 21:17:08,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:08,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089826345] [2021-06-05 21:17:08,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:08,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:08,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:08,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:08,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089826345] [2021-06-05 21:17:08,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089826345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:08,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460458746] [2021-06-05 21:17:08,907 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:08,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:17:08,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:08,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:17:08,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:09,001 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:17:09,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-06-05 21:17:09,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:17:09,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:17:09,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:17:09,009 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-06-05 21:17:09,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:09,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460458746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:09,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:09,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-06-05 21:17:09,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523073231] [2021-06-05 21:17:09,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:17:09,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:09,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:17:09,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:17:09,025 INFO L87 Difference]: Start difference. First operand 39 states and 87 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:09,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:09,063 INFO L93 Difference]: Finished difference Result 68 states and 138 transitions. [2021-06-05 21:17:09,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:17:09,064 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 21:17:09,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:09,066 INFO L225 Difference]: With dead ends: 68 [2021-06-05 21:17:09,066 INFO L226 Difference]: Without dead ends: 65 [2021-06-05 21:17:09,066 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 42.9ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:17:09,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-06-05 21:17:09,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 46. [2021-06-05 21:17:09,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.4) internal successors, (108), 45 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:09,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 108 transitions. [2021-06-05 21:17:09,078 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 108 transitions. Word has length 12 [2021-06-05 21:17:09,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:09,079 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 108 transitions. [2021-06-05 21:17:09,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:09,079 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 108 transitions. [2021-06-05 21:17:09,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 21:17:09,079 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:09,079 INFO L554 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:09,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:09,285 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:09,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:09,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1948130383, now seen corresponding path program 5 times [2021-06-05 21:17:09,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:09,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617607177] [2021-06-05 21:17:09,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:09,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:09,327 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:09,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:09,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617607177] [2021-06-05 21:17:09,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617607177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:09,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702068994] [2021-06-05 21:17:09,328 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:09,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:17:09,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:09,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 21:17:09,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:09,394 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:09,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702068994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:09,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:09,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 21:17:09,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251889031] [2021-06-05 21:17:09,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:17:09,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:09,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:17:09,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:17:09,396 INFO L87 Difference]: Start difference. First operand 46 states and 108 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:09,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:09,460 INFO L93 Difference]: Finished difference Result 90 states and 168 transitions. [2021-06-05 21:17:09,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:17:09,460 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 21:17:09,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:09,461 INFO L225 Difference]: With dead ends: 90 [2021-06-05 21:17:09,461 INFO L226 Difference]: Without dead ends: 90 [2021-06-05 21:17:09,461 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 52.3ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:17:09,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-05 21:17:09,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 46. [2021-06-05 21:17:09,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.4444444444444446) internal successors, (110), 45 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:09,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 110 transitions. [2021-06-05 21:17:09,465 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 110 transitions. Word has length 13 [2021-06-05 21:17:09,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:09,465 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 110 transitions. [2021-06-05 21:17:09,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:09,465 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 110 transitions. [2021-06-05 21:17:09,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 21:17:09,466 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:09,466 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:09,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:09,689 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:09,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:09,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1542411386, now seen corresponding path program 6 times [2021-06-05 21:17:09,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:09,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878009555] [2021-06-05 21:17:09,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:09,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:09,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:09,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:09,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878009555] [2021-06-05 21:17:09,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878009555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:09,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714288489] [2021-06-05 21:17:09,733 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:09,755 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 21:17:09,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:09,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 21:17:09,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:09,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:09,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714288489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:09,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:09,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 21:17:09,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117109407] [2021-06-05 21:17:09,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:17:09,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:09,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:17:09,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:17:09,796 INFO L87 Difference]: Start difference. First operand 46 states and 110 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:09,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:09,887 INFO L93 Difference]: Finished difference Result 87 states and 172 transitions. [2021-06-05 21:17:09,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:17:09,888 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 21:17:09,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:09,889 INFO L225 Difference]: With dead ends: 87 [2021-06-05 21:17:09,889 INFO L226 Difference]: Without dead ends: 82 [2021-06-05 21:17:09,889 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 60.6ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:17:09,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-06-05 21:17:09,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 56. [2021-06-05 21:17:09,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.418181818181818) internal successors, (133), 55 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:09,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 133 transitions. [2021-06-05 21:17:09,893 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 133 transitions. Word has length 13 [2021-06-05 21:17:09,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:09,894 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 133 transitions. [2021-06-05 21:17:09,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:09,894 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 133 transitions. [2021-06-05 21:17:09,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 21:17:09,894 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:09,894 INFO L554 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:10,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 21:17:10,110 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:10,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:10,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1142142321, now seen corresponding path program 7 times [2021-06-05 21:17:10,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:10,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120438281] [2021-06-05 21:17:10,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:10,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:10,151 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:10,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:10,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120438281] [2021-06-05 21:17:10,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120438281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:10,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273996141] [2021-06-05 21:17:10,152 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:10,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:10,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 21:17:10,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:10,208 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:10,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273996141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:10,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:10,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 21:17:10,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487034955] [2021-06-05 21:17:10,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:17:10,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:10,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:17:10,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:17:10,210 INFO L87 Difference]: Start difference. First operand 56 states and 133 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:10,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:10,273 INFO L93 Difference]: Finished difference Result 71 states and 152 transitions. [2021-06-05 21:17:10,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:17:10,274 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 21:17:10,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:10,275 INFO L225 Difference]: With dead ends: 71 [2021-06-05 21:17:10,275 INFO L226 Difference]: Without dead ends: 70 [2021-06-05 21:17:10,275 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 39.3ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:17:10,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-06-05 21:17:10,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 57. [2021-06-05 21:17:10,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.375) internal successors, (133), 56 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:10,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 133 transitions. [2021-06-05 21:17:10,279 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 133 transitions. Word has length 13 [2021-06-05 21:17:10,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:10,279 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 133 transitions. [2021-06-05 21:17:10,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:10,280 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 133 transitions. [2021-06-05 21:17:10,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 21:17:10,280 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:10,280 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:10,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 21:17:10,497 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:10,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:10,497 INFO L82 PathProgramCache]: Analyzing trace with hash 2059198674, now seen corresponding path program 8 times [2021-06-05 21:17:10,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:10,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769017714] [2021-06-05 21:17:10,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:10,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:10,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:10,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:10,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769017714] [2021-06-05 21:17:10,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769017714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:10,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971655531] [2021-06-05 21:17:10,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:10,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:17:10,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:10,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 21:17:10,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:10,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:10,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971655531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:10,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:10,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 21:17:10,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690981306] [2021-06-05 21:17:10,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:17:10,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:10,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:17:10,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:17:10,631 INFO L87 Difference]: Start difference. First operand 57 states and 133 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:10,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:10,670 INFO L93 Difference]: Finished difference Result 88 states and 173 transitions. [2021-06-05 21:17:10,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:17:10,671 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 21:17:10,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:10,671 INFO L225 Difference]: With dead ends: 88 [2021-06-05 21:17:10,672 INFO L226 Difference]: Without dead ends: 88 [2021-06-05 21:17:10,672 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 26.3ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:17:10,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-05 21:17:10,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 57. [2021-06-05 21:17:10,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.375) internal successors, (133), 56 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:10,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 133 transitions. [2021-06-05 21:17:10,676 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 133 transitions. Word has length 13 [2021-06-05 21:17:10,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:10,676 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 133 transitions. [2021-06-05 21:17:10,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:10,677 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 133 transitions. [2021-06-05 21:17:10,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 21:17:10,677 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:10,677 INFO L554 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:10,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:10,878 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:10,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:10,879 INFO L82 PathProgramCache]: Analyzing trace with hash 22479943, now seen corresponding path program 9 times [2021-06-05 21:17:10,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:10,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633580264] [2021-06-05 21:17:10,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:10,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:10,926 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:10,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:10,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633580264] [2021-06-05 21:17:10,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633580264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:10,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866179798] [2021-06-05 21:17:10,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:10,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:17:10,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:10,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 21:17:10,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:11,004 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:11,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866179798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:11,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:11,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 21:17:11,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825915959] [2021-06-05 21:17:11,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:17:11,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:11,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:17:11,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:17:11,005 INFO L87 Difference]: Start difference. First operand 57 states and 133 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:11,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:11,036 INFO L93 Difference]: Finished difference Result 97 states and 193 transitions. [2021-06-05 21:17:11,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 21:17:11,036 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 21:17:11,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:11,037 INFO L225 Difference]: With dead ends: 97 [2021-06-05 21:17:11,037 INFO L226 Difference]: Without dead ends: 97 [2021-06-05 21:17:11,037 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 42.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:17:11,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-06-05 21:17:11,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 60. [2021-06-05 21:17:11,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.4237288135593222) internal successors, (143), 59 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:11,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 143 transitions. [2021-06-05 21:17:11,041 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 143 transitions. Word has length 13 [2021-06-05 21:17:11,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:11,041 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 143 transitions. [2021-06-05 21:17:11,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:11,041 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 143 transitions. [2021-06-05 21:17:11,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 21:17:11,042 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:11,042 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:11,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:11,261 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:11,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:11,261 INFO L82 PathProgramCache]: Analyzing trace with hash 967241926, now seen corresponding path program 10 times [2021-06-05 21:17:11,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:11,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856323989] [2021-06-05 21:17:11,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:11,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:11,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:11,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:11,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856323989] [2021-06-05 21:17:11,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856323989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:11,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497375059] [2021-06-05 21:17:11,294 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:11,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:17:11,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:11,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 21:17:11,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:11,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:11,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497375059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:11,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:11,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 21:17:11,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26878982] [2021-06-05 21:17:11,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:17:11,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:11,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:17:11,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:17:11,351 INFO L87 Difference]: Start difference. First operand 60 states and 143 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:11,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:11,414 INFO L93 Difference]: Finished difference Result 99 states and 200 transitions. [2021-06-05 21:17:11,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:17:11,414 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 21:17:11,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:11,417 INFO L225 Difference]: With dead ends: 99 [2021-06-05 21:17:11,417 INFO L226 Difference]: Without dead ends: 97 [2021-06-05 21:17:11,417 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 34.9ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:17:11,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-06-05 21:17:11,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 64. [2021-06-05 21:17:11,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.492063492063492) internal successors, (157), 63 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:11,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2021-06-05 21:17:11,427 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 13 [2021-06-05 21:17:11,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:11,428 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2021-06-05 21:17:11,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:11,428 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2021-06-05 21:17:11,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 21:17:11,430 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:11,430 INFO L554 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:11,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 21:17:11,653 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:11,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:11,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1767934633, now seen corresponding path program 11 times [2021-06-05 21:17:11,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:11,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491305748] [2021-06-05 21:17:11,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:11,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:11,684 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:11,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:11,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491305748] [2021-06-05 21:17:11,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491305748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:11,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894119805] [2021-06-05 21:17:11,684 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:11,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:17:11,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:11,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 21:17:11,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:11,746 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:11,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894119805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:11,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:11,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 21:17:11,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556940381] [2021-06-05 21:17:11,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:17:11,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:11,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:17:11,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:17:11,748 INFO L87 Difference]: Start difference. First operand 64 states and 157 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:11,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:11,814 INFO L93 Difference]: Finished difference Result 101 states and 205 transitions. [2021-06-05 21:17:11,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:17:11,815 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 21:17:11,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:11,815 INFO L225 Difference]: With dead ends: 101 [2021-06-05 21:17:11,815 INFO L226 Difference]: Without dead ends: 100 [2021-06-05 21:17:11,817 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 31.9ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:17:11,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-05 21:17:11,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2021-06-05 21:17:11,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.4761904761904763) internal successors, (156), 63 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:11,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 156 transitions. [2021-06-05 21:17:11,824 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 156 transitions. Word has length 13 [2021-06-05 21:17:11,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:11,824 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 156 transitions. [2021-06-05 21:17:11,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:11,825 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 156 transitions. [2021-06-05 21:17:11,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 21:17:11,826 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:11,826 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:12,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 21:17:12,039 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:12,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:12,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1609976310, now seen corresponding path program 12 times [2021-06-05 21:17:12,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:12,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131961095] [2021-06-05 21:17:12,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:12,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:12,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:12,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:12,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131961095] [2021-06-05 21:17:12,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131961095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:12,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047642877] [2021-06-05 21:17:12,073 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:12,124 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:17:12,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:12,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 21:17:12,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:12,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:12,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047642877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:12,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:12,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 21:17:12,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701560475] [2021-06-05 21:17:12,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:17:12,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:12,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:17:12,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:17:12,160 INFO L87 Difference]: Start difference. First operand 64 states and 156 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:12,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:12,194 INFO L93 Difference]: Finished difference Result 98 states and 199 transitions. [2021-06-05 21:17:12,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:17:12,195 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 21:17:12,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:12,196 INFO L225 Difference]: With dead ends: 98 [2021-06-05 21:17:12,196 INFO L226 Difference]: Without dead ends: 98 [2021-06-05 21:17:12,196 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 25.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:17:12,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-06-05 21:17:12,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2021-06-05 21:17:12,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.4761904761904763) internal successors, (156), 63 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:12,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 156 transitions. [2021-06-05 21:17:12,199 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 156 transitions. Word has length 13 [2021-06-05 21:17:12,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:12,199 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 156 transitions. [2021-06-05 21:17:12,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:12,199 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 156 transitions. [2021-06-05 21:17:12,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 21:17:12,200 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:12,200 INFO L554 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:12,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 21:17:12,421 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:12,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:12,421 INFO L82 PathProgramCache]: Analyzing trace with hash -816419355, now seen corresponding path program 13 times [2021-06-05 21:17:12,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:12,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056281030] [2021-06-05 21:17:12,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:12,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:12,457 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:12,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:12,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056281030] [2021-06-05 21:17:12,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056281030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:12,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194309803] [2021-06-05 21:17:12,457 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:12,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:12,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 21:17:12,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:12,528 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:12,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194309803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:12,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:12,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 21:17:12,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079995600] [2021-06-05 21:17:12,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:17:12,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:12,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:17:12,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:17:12,530 INFO L87 Difference]: Start difference. First operand 64 states and 156 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:12,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:12,599 INFO L93 Difference]: Finished difference Result 94 states and 196 transitions. [2021-06-05 21:17:12,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:17:12,599 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 21:17:12,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:12,600 INFO L225 Difference]: With dead ends: 94 [2021-06-05 21:17:12,600 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 21:17:12,600 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 58.3ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:17:12,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 21:17:12,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2021-06-05 21:17:12,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.453125) internal successors, (157), 64 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:12,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 157 transitions. [2021-06-05 21:17:12,602 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 157 transitions. Word has length 13 [2021-06-05 21:17:12,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:12,603 INFO L482 AbstractCegarLoop]: Abstraction has 65 states and 157 transitions. [2021-06-05 21:17:12,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:12,603 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 157 transitions. [2021-06-05 21:17:12,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 21:17:12,603 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:12,603 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:12,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:12,812 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:12,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:12,813 INFO L82 PathProgramCache]: Analyzing trace with hash 955943652, now seen corresponding path program 14 times [2021-06-05 21:17:12,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:12,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124242078] [2021-06-05 21:17:12,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:12,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:12,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:12,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:12,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124242078] [2021-06-05 21:17:12,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124242078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:12,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675781630] [2021-06-05 21:17:12,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:12,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:17:12,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:12,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 21:17:12,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:12,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:12,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675781630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:12,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:12,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 21:17:12,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645481821] [2021-06-05 21:17:12,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:17:12,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:12,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:17:12,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:17:12,916 INFO L87 Difference]: Start difference. First operand 65 states and 157 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:12,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:12,983 INFO L93 Difference]: Finished difference Result 101 states and 203 transitions. [2021-06-05 21:17:12,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:17:12,984 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 21:17:12,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:12,985 INFO L225 Difference]: With dead ends: 101 [2021-06-05 21:17:12,985 INFO L226 Difference]: Without dead ends: 101 [2021-06-05 21:17:12,985 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 46.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:17:12,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-06-05 21:17:12,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 65. [2021-06-05 21:17:12,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.453125) internal successors, (157), 64 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:12,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 157 transitions. [2021-06-05 21:17:12,988 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 157 transitions. Word has length 13 [2021-06-05 21:17:12,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:12,988 INFO L482 AbstractCegarLoop]: Abstraction has 65 states and 157 transitions. [2021-06-05 21:17:12,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:12,988 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 157 transitions. [2021-06-05 21:17:12,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 21:17:12,989 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:12,989 INFO L554 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:13,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 21:17:13,211 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:13,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:13,211 INFO L82 PathProgramCache]: Analyzing trace with hash -2052794865, now seen corresponding path program 15 times [2021-06-05 21:17:13,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:13,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88475385] [2021-06-05 21:17:13,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:13,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:13,252 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:13,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:13,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88475385] [2021-06-05 21:17:13,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88475385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:13,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653169762] [2021-06-05 21:17:13,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:13,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:17:13,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:13,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 21:17:13,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:13,316 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:13,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653169762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:13,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:13,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-06-05 21:17:13,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978299809] [2021-06-05 21:17:13,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:17:13,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:13,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:17:13,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:17:13,317 INFO L87 Difference]: Start difference. First operand 65 states and 157 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:13,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:13,362 INFO L93 Difference]: Finished difference Result 118 states and 240 transitions. [2021-06-05 21:17:13,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:17:13,363 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 21:17:13,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:13,364 INFO L225 Difference]: With dead ends: 118 [2021-06-05 21:17:13,364 INFO L226 Difference]: Without dead ends: 118 [2021-06-05 21:17:13,364 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 41.6ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:17:13,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-06-05 21:17:13,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 69. [2021-06-05 21:17:13,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.5294117647058822) internal successors, (172), 68 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:13,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 172 transitions. [2021-06-05 21:17:13,367 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 172 transitions. Word has length 13 [2021-06-05 21:17:13,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:13,367 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 172 transitions. [2021-06-05 21:17:13,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:13,367 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 172 transitions. [2021-06-05 21:17:13,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 21:17:13,368 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:13,368 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:13,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:13,577 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:13,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:13,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1108032882, now seen corresponding path program 16 times [2021-06-05 21:17:13,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:13,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306587148] [2021-06-05 21:17:13,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:13,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:13,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:13,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:13,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306587148] [2021-06-05 21:17:13,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306587148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:13,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810883917] [2021-06-05 21:17:13,615 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:13,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:17:13,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:13,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 21:17:13,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:13,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:13,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810883917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:13,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:13,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-06-05 21:17:13,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260024293] [2021-06-05 21:17:13,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:17:13,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:13,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:17:13,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:17:13,688 INFO L87 Difference]: Start difference. First operand 69 states and 172 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:13,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:13,765 INFO L93 Difference]: Finished difference Result 109 states and 231 transitions. [2021-06-05 21:17:13,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:17:13,765 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 21:17:13,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:13,766 INFO L225 Difference]: With dead ends: 109 [2021-06-05 21:17:13,766 INFO L226 Difference]: Without dead ends: 107 [2021-06-05 21:17:13,766 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 54.4ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:17:13,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-06-05 21:17:13,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2021-06-05 21:17:13,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.5945945945945947) internal successors, (192), 74 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:13,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 192 transitions. [2021-06-05 21:17:13,769 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 192 transitions. Word has length 13 [2021-06-05 21:17:13,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:13,769 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 192 transitions. [2021-06-05 21:17:13,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:13,770 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 192 transitions. [2021-06-05 21:17:13,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 21:17:13,770 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:13,770 INFO L554 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:13,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:13,977 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:13,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:13,977 INFO L82 PathProgramCache]: Analyzing trace with hash -307340175, now seen corresponding path program 17 times [2021-06-05 21:17:13,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:13,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724064872] [2021-06-05 21:17:13,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:13,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:14,021 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:14,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:14,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724064872] [2021-06-05 21:17:14,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724064872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:14,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176972071] [2021-06-05 21:17:14,022 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:14,051 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:17:14,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:14,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 21:17:14,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:14,092 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:14,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176972071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:14,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:14,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-06-05 21:17:14,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363131418] [2021-06-05 21:17:14,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:17:14,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:14,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:17:14,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:17:14,094 INFO L87 Difference]: Start difference. First operand 75 states and 192 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:14,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:14,156 INFO L93 Difference]: Finished difference Result 114 states and 244 transitions. [2021-06-05 21:17:14,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:17:14,156 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 21:17:14,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:14,157 INFO L225 Difference]: With dead ends: 114 [2021-06-05 21:17:14,157 INFO L226 Difference]: Without dead ends: 113 [2021-06-05 21:17:14,158 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 52.7ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:17:14,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-06-05 21:17:14,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 75. [2021-06-05 21:17:14,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.581081081081081) internal successors, (191), 74 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:14,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 191 transitions. [2021-06-05 21:17:14,161 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 191 transitions. Word has length 13 [2021-06-05 21:17:14,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:14,161 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 191 transitions. [2021-06-05 21:17:14,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:14,161 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 191 transitions. [2021-06-05 21:17:14,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 21:17:14,162 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:14,162 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:14,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 21:17:14,375 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:14,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:14,375 INFO L82 PathProgramCache]: Analyzing trace with hash 609716178, now seen corresponding path program 18 times [2021-06-05 21:17:14,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:14,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435465682] [2021-06-05 21:17:14,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:14,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:14,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:14,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:14,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435465682] [2021-06-05 21:17:14,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435465682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:14,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183302827] [2021-06-05 21:17:14,435 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:14,457 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:17:14,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:14,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 21:17:14,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:14,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:14,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183302827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:14,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:14,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-06-05 21:17:14,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123691236] [2021-06-05 21:17:14,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:17:14,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:14,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:17:14,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:17:14,502 INFO L87 Difference]: Start difference. First operand 75 states and 191 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:14,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:14,561 INFO L93 Difference]: Finished difference Result 102 states and 223 transitions. [2021-06-05 21:17:14,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:17:14,561 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 21:17:14,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:14,562 INFO L225 Difference]: With dead ends: 102 [2021-06-05 21:17:14,562 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 21:17:14,562 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 64.7ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:17:14,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 21:17:14,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 74. [2021-06-05 21:17:14,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.5342465753424657) internal successors, (185), 73 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:14,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2021-06-05 21:17:14,565 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 13 [2021-06-05 21:17:14,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:14,565 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2021-06-05 21:17:14,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:14,565 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2021-06-05 21:17:14,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 21:17:14,566 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:14,566 INFO L554 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:14,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:14,781 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:14,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:14,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1403273133, now seen corresponding path program 19 times [2021-06-05 21:17:14,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:14,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263491524] [2021-06-05 21:17:14,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:14,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:14,818 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:14,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:14,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263491524] [2021-06-05 21:17:14,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263491524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:14,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606163913] [2021-06-05 21:17:14,818 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:14,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:14,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 21:17:14,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:14,894 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:14,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606163913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:14,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:14,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 21:17:14,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182392946] [2021-06-05 21:17:14,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:17:14,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:14,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:17:14,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:17:14,895 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:14,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:14,971 INFO L93 Difference]: Finished difference Result 118 states and 244 transitions. [2021-06-05 21:17:14,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:17:14,971 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 21:17:14,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:14,972 INFO L225 Difference]: With dead ends: 118 [2021-06-05 21:17:14,972 INFO L226 Difference]: Without dead ends: 116 [2021-06-05 21:17:14,972 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:17:14,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-06-05 21:17:14,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 74. [2021-06-05 21:17:14,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.5205479452054793) internal successors, (184), 73 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:14,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 184 transitions. [2021-06-05 21:17:14,975 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 184 transitions. Word has length 13 [2021-06-05 21:17:14,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:14,975 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 184 transitions. [2021-06-05 21:17:14,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:14,975 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 184 transitions. [2021-06-05 21:17:14,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 21:17:14,976 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:14,976 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:15,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 21:17:15,197 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:15,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:15,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1119331156, now seen corresponding path program 20 times [2021-06-05 21:17:15,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:15,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184752848] [2021-06-05 21:17:15,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:15,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:15,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:15,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:15,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184752848] [2021-06-05 21:17:15,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184752848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:15,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013628013] [2021-06-05 21:17:15,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:15,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:17:15,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:15,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 21:17:15,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:15,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:15,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013628013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:15,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:15,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 21:17:15,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492129802] [2021-06-05 21:17:15,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:17:15,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:15,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:17:15,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:17:15,316 INFO L87 Difference]: Start difference. First operand 74 states and 184 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:15,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:15,400 INFO L93 Difference]: Finished difference Result 103 states and 223 transitions. [2021-06-05 21:17:15,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:17:15,400 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 21:17:15,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:15,401 INFO L225 Difference]: With dead ends: 103 [2021-06-05 21:17:15,401 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 21:17:15,401 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 70.6ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:17:15,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 21:17:15,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 74. [2021-06-05 21:17:15,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.5205479452054793) internal successors, (184), 73 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:15,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 184 transitions. [2021-06-05 21:17:15,404 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 184 transitions. Word has length 13 [2021-06-05 21:17:15,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:15,404 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 184 transitions. [2021-06-05 21:17:15,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:15,405 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 184 transitions. [2021-06-05 21:17:15,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 21:17:15,405 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:15,405 INFO L554 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:15,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 21:17:15,621 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:15,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:15,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1402289167, now seen corresponding path program 21 times [2021-06-05 21:17:15,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:15,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675342286] [2021-06-05 21:17:15,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:15,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:15,653 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:15,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:15,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675342286] [2021-06-05 21:17:15,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675342286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:15,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398337054] [2021-06-05 21:17:15,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:15,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:17:15,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:15,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 21:17:15,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:15,725 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:15,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398337054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:15,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:15,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-06-05 21:17:15,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129445888] [2021-06-05 21:17:15,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:17:15,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:15,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:17:15,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:17:15,726 INFO L87 Difference]: Start difference. First operand 74 states and 184 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:15,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:15,801 INFO L93 Difference]: Finished difference Result 107 states and 246 transitions. [2021-06-05 21:17:15,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:17:15,804 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 21:17:15,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:15,805 INFO L225 Difference]: With dead ends: 107 [2021-06-05 21:17:15,805 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 21:17:15,805 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 65.6ms TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:17:15,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 21:17:15,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 73. [2021-06-05 21:17:15,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.5277777777777777) internal successors, (182), 72 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:15,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 182 transitions. [2021-06-05 21:17:15,807 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 182 transitions. Word has length 13 [2021-06-05 21:17:15,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:15,807 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 182 transitions. [2021-06-05 21:17:15,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:15,807 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 182 transitions. [2021-06-05 21:17:15,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 21:17:15,807 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:15,807 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:16,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:16,008 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:16,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:16,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1114776338, now seen corresponding path program 22 times [2021-06-05 21:17:16,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:16,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529285219] [2021-06-05 21:17:16,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:16,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:16,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:16,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:16,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529285219] [2021-06-05 21:17:16,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529285219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:16,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812088140] [2021-06-05 21:17:16,057 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:16,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:17:16,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:16,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 21:17:16,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:16,138 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:16,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812088140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:16,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:16,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-06-05 21:17:16,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518229604] [2021-06-05 21:17:16,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:17:16,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:16,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:17:16,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:17:16,140 INFO L87 Difference]: Start difference. First operand 73 states and 182 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:16,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:16,271 INFO L93 Difference]: Finished difference Result 107 states and 252 transitions. [2021-06-05 21:17:16,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:17:16,272 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 21:17:16,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:16,272 INFO L225 Difference]: With dead ends: 107 [2021-06-05 21:17:16,272 INFO L226 Difference]: Without dead ends: 107 [2021-06-05 21:17:16,273 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 117.7ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:17:16,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-06-05 21:17:16,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2021-06-05 21:17:16,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.5421686746987953) internal successors, (211), 83 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:16,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 211 transitions. [2021-06-05 21:17:16,276 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 211 transitions. Word has length 13 [2021-06-05 21:17:16,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:16,276 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 211 transitions. [2021-06-05 21:17:16,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:16,276 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 211 transitions. [2021-06-05 21:17:16,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 21:17:16,276 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:16,276 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:16,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 21:17:16,498 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:16,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:16,499 INFO L82 PathProgramCache]: Analyzing trace with hash 285571430, now seen corresponding path program 23 times [2021-06-05 21:17:16,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:16,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505663745] [2021-06-05 21:17:16,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:16,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:16,532 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:17:16,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:16,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505663745] [2021-06-05 21:17:16,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505663745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:16,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194725103] [2021-06-05 21:17:16,533 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:16,564 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:17:16,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:16,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:17:16,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:16,606 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:17:16,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194725103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:16,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:16,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 21:17:16,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274244591] [2021-06-05 21:17:16,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:17:16,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:16,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:17:16,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:17:16,610 INFO L87 Difference]: Start difference. First operand 84 states and 211 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:16,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:16,662 INFO L93 Difference]: Finished difference Result 227 states and 579 transitions. [2021-06-05 21:17:16,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:17:16,662 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 21:17:16,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:16,663 INFO L225 Difference]: With dead ends: 227 [2021-06-05 21:17:16,663 INFO L226 Difference]: Without dead ends: 225 [2021-06-05 21:17:16,663 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 48.8ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:17:16,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-06-05 21:17:16,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 168. [2021-06-05 21:17:16,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.6347305389221556) internal successors, (440), 167 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:16,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 440 transitions. [2021-06-05 21:17:16,668 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 440 transitions. Word has length 14 [2021-06-05 21:17:16,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:16,669 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 440 transitions. [2021-06-05 21:17:16,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:16,669 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 440 transitions. [2021-06-05 21:17:16,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:17:16,669 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:16,669 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:16,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:16,873 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:16,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:16,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1118463878, now seen corresponding path program 24 times [2021-06-05 21:17:16,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:16,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978344213] [2021-06-05 21:17:16,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:16,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:16,921 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:16,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:16,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978344213] [2021-06-05 21:17:16,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978344213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:16,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495093148] [2021-06-05 21:17:16,922 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:16,947 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:17:16,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:16,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:17:16,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:17,073 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:17:17,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 21:17:17,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:17:17,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:17:17,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:17:17,138 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 21:17:17,145 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:17,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495093148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:17,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:17,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-06-05 21:17:17,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250716787] [2021-06-05 21:17:17,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:17:17,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:17,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:17:17,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:17:17,146 INFO L87 Difference]: Start difference. First operand 168 states and 440 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:17,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:17,225 INFO L93 Difference]: Finished difference Result 248 states and 589 transitions. [2021-06-05 21:17:17,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:17:17,225 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:17:17,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:17,227 INFO L225 Difference]: With dead ends: 248 [2021-06-05 21:17:17,227 INFO L226 Difference]: Without dead ends: 245 [2021-06-05 21:17:17,227 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 82.2ms TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:17:17,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-06-05 21:17:17,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 196. [2021-06-05 21:17:17,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.6666666666666665) internal successors, (520), 195 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:17,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 520 transitions. [2021-06-05 21:17:17,232 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 520 transitions. Word has length 15 [2021-06-05 21:17:17,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:17,234 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 520 transitions. [2021-06-05 21:17:17,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:17,234 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 520 transitions. [2021-06-05 21:17:17,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:17:17,234 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:17,234 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:17,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 21:17:17,449 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:17,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:17,449 INFO L82 PathProgramCache]: Analyzing trace with hash -678148380, now seen corresponding path program 25 times [2021-06-05 21:17:17,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:17,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514763880] [2021-06-05 21:17:17,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:17,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:17,486 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:17,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:17,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514763880] [2021-06-05 21:17:17,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514763880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:17,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887856014] [2021-06-05 21:17:17,487 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:17,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:17,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:17:17,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:17,619 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:17:17,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 21:17:17,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:17:17,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:17:17,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:17:17,672 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 21:17:17,679 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:17,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887856014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:17,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:17,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-06-05 21:17:17,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919610955] [2021-06-05 21:17:17,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:17:17,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:17,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:17:17,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:17:17,680 INFO L87 Difference]: Start difference. First operand 196 states and 520 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:17,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:17,781 INFO L93 Difference]: Finished difference Result 296 states and 729 transitions. [2021-06-05 21:17:17,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:17:17,782 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:17:17,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:17,783 INFO L225 Difference]: With dead ends: 296 [2021-06-05 21:17:17,783 INFO L226 Difference]: Without dead ends: 292 [2021-06-05 21:17:17,785 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 78.6ms TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:17:17,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-06-05 21:17:17,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 224. [2021-06-05 21:17:17,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.789237668161435) internal successors, (622), 223 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:17,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 622 transitions. [2021-06-05 21:17:17,798 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 622 transitions. Word has length 15 [2021-06-05 21:17:17,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:17,798 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 622 transitions. [2021-06-05 21:17:17,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:17,798 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 622 transitions. [2021-06-05 21:17:17,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:17:17,799 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:17,799 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:18,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 21:17:18,013 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:18,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:18,013 INFO L82 PathProgramCache]: Analyzing trace with hash -519315694, now seen corresponding path program 26 times [2021-06-05 21:17:18,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:18,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961643927] [2021-06-05 21:17:18,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:18,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:18,044 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:17:18,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:18,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961643927] [2021-06-05 21:17:18,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961643927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:18,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141249775] [2021-06-05 21:17:18,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:18,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:17:18,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:18,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:17:18,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:18,173 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:17:18,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 21:17:18,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:17:18,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:17:18,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:17:18,214 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 21:17:18,222 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:18,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141249775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:18,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:18,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-06-05 21:17:18,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086907812] [2021-06-05 21:17:18,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:17:18,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:18,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:17:18,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:17:18,223 INFO L87 Difference]: Start difference. First operand 224 states and 622 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:18,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:18,316 INFO L93 Difference]: Finished difference Result 353 states and 901 transitions. [2021-06-05 21:17:18,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:17:18,317 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:17:18,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:18,318 INFO L225 Difference]: With dead ends: 353 [2021-06-05 21:17:18,318 INFO L226 Difference]: Without dead ends: 349 [2021-06-05 21:17:18,319 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 75.0ms TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:17:18,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-06-05 21:17:18,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 269. [2021-06-05 21:17:18,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.906716417910448) internal successors, (779), 268 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:18,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 779 transitions. [2021-06-05 21:17:18,327 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 779 transitions. Word has length 15 [2021-06-05 21:17:18,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:18,327 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 779 transitions. [2021-06-05 21:17:18,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:18,327 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 779 transitions. [2021-06-05 21:17:18,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:17:18,328 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:18,328 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:18,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 21:17:18,551 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:18,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:18,551 INFO L82 PathProgramCache]: Analyzing trace with hash 109530276, now seen corresponding path program 27 times [2021-06-05 21:17:18,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:18,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136904024] [2021-06-05 21:17:18,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:18,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:18,581 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:18,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:18,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136904024] [2021-06-05 21:17:18,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136904024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:18,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067873144] [2021-06-05 21:17:18,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:18,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:17:18,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:18,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:17:18,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:18,716 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:17:18,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 21:17:18,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:17:18,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:17:18,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:17:18,747 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 21:17:18,755 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:18,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067873144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:18,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:18,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-06-05 21:17:18,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564719294] [2021-06-05 21:17:18,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:17:18,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:18,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:17:18,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:17:18,756 INFO L87 Difference]: Start difference. First operand 269 states and 779 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:18,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:18,836 INFO L93 Difference]: Finished difference Result 397 states and 1046 transitions. [2021-06-05 21:17:18,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:17:18,836 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:17:18,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:18,838 INFO L225 Difference]: With dead ends: 397 [2021-06-05 21:17:18,838 INFO L226 Difference]: Without dead ends: 394 [2021-06-05 21:17:18,838 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 80.0ms TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:17:18,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-06-05 21:17:18,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 318. [2021-06-05 21:17:18,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.9589905362776023) internal successors, (938), 317 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:18,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 938 transitions. [2021-06-05 21:17:18,847 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 938 transitions. Word has length 15 [2021-06-05 21:17:18,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:18,847 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 938 transitions. [2021-06-05 21:17:18,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:18,847 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 938 transitions. [2021-06-05 21:17:18,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:17:18,848 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:18,848 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:19,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:19,065 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:19,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:19,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1871081134, now seen corresponding path program 28 times [2021-06-05 21:17:19,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:19,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516801976] [2021-06-05 21:17:19,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:19,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:19,109 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:19,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:19,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516801976] [2021-06-05 21:17:19,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516801976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:19,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162265855] [2021-06-05 21:17:19,110 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:19,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:17:19,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:19,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:17:19,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:19,234 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:17:19,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 21:17:19,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:17:19,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:17:19,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:17:19,257 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 21:17:19,264 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:19,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162265855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:19,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:19,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-06-05 21:17:19,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117964725] [2021-06-05 21:17:19,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:17:19,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:19,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:17:19,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:17:19,265 INFO L87 Difference]: Start difference. First operand 318 states and 938 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:19,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:19,349 INFO L93 Difference]: Finished difference Result 427 states and 1156 transitions. [2021-06-05 21:17:19,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:17:19,349 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 21:17:19,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:19,352 INFO L225 Difference]: With dead ends: 427 [2021-06-05 21:17:19,352 INFO L226 Difference]: Without dead ends: 424 [2021-06-05 21:17:19,352 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 67.2ms TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:17:19,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-06-05 21:17:19,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 357. [2021-06-05 21:17:19,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.9831460674157304) internal successors, (1062), 356 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:19,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1062 transitions. [2021-06-05 21:17:19,362 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1062 transitions. Word has length 15 [2021-06-05 21:17:19,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:19,362 INFO L482 AbstractCegarLoop]: Abstraction has 357 states and 1062 transitions. [2021-06-05 21:17:19,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:19,362 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1062 transitions. [2021-06-05 21:17:19,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:17:19,363 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:19,363 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:19,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 21:17:19,577 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:19,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:19,577 INFO L82 PathProgramCache]: Analyzing trace with hash 335713551, now seen corresponding path program 29 times [2021-06-05 21:17:19,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:19,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276109534] [2021-06-05 21:17:19,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:19,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:19,646 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:19,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:19,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276109534] [2021-06-05 21:17:19,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276109534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:19,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462863433] [2021-06-05 21:17:19,647 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:19,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:17:19,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:19,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:17:19,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:19,730 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:19,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462863433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:19,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:19,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 21:17:19,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59944318] [2021-06-05 21:17:19,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:17:19,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:19,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:17:19,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:17:19,732 INFO L87 Difference]: Start difference. First operand 357 states and 1062 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:19,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:19,890 INFO L93 Difference]: Finished difference Result 482 states and 1270 transitions. [2021-06-05 21:17:19,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:17:19,891 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:17:19,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:19,893 INFO L225 Difference]: With dead ends: 482 [2021-06-05 21:17:19,893 INFO L226 Difference]: Without dead ends: 475 [2021-06-05 21:17:19,893 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 129.9ms TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:17:19,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-06-05 21:17:19,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 372. [2021-06-05 21:17:19,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 2.9838274932614555) internal successors, (1107), 371 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:19,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1107 transitions. [2021-06-05 21:17:19,905 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1107 transitions. Word has length 16 [2021-06-05 21:17:19,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:19,905 INFO L482 AbstractCegarLoop]: Abstraction has 372 states and 1107 transitions. [2021-06-05 21:17:19,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:19,905 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1107 transitions. [2021-06-05 21:17:19,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:17:19,906 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:19,906 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:20,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:20,133 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:20,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:20,133 INFO L82 PathProgramCache]: Analyzing trace with hash 2034224775, now seen corresponding path program 30 times [2021-06-05 21:17:20,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:20,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966036150] [2021-06-05 21:17:20,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:20,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:20,180 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:20,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:20,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966036150] [2021-06-05 21:17:20,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966036150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:20,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958698474] [2021-06-05 21:17:20,181 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:20,209 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:17:20,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:20,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:17:20,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:20,247 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:20,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958698474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:20,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:20,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:17:20,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832104647] [2021-06-05 21:17:20,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:17:20,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:20,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:17:20,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:17:20,248 INFO L87 Difference]: Start difference. First operand 372 states and 1107 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:20,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:20,293 INFO L93 Difference]: Finished difference Result 490 states and 1284 transitions. [2021-06-05 21:17:20,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:17:20,294 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:17:20,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:20,296 INFO L225 Difference]: With dead ends: 490 [2021-06-05 21:17:20,296 INFO L226 Difference]: Without dead ends: 490 [2021-06-05 21:17:20,296 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 41.6ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:17:20,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-06-05 21:17:20,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 352. [2021-06-05 21:17:20,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 2.9458689458689458) internal successors, (1034), 351 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:20,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1034 transitions. [2021-06-05 21:17:20,304 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1034 transitions. Word has length 16 [2021-06-05 21:17:20,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:20,305 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1034 transitions. [2021-06-05 21:17:20,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:20,305 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1034 transitions. [2021-06-05 21:17:20,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:17:20,306 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:20,306 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:20,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 21:17:20,529 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:20,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:20,530 INFO L82 PathProgramCache]: Analyzing trace with hash 475308401, now seen corresponding path program 31 times [2021-06-05 21:17:20,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:20,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89704212] [2021-06-05 21:17:20,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:20,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:20,567 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:20,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:20,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89704212] [2021-06-05 21:17:20,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89704212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:20,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843122328] [2021-06-05 21:17:20,567 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:20,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:20,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:17:20,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:20,621 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:20,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843122328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:20,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:20,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:17:20,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453840656] [2021-06-05 21:17:20,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:17:20,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:20,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:17:20,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:17:20,623 INFO L87 Difference]: Start difference. First operand 352 states and 1034 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:20,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:20,721 INFO L93 Difference]: Finished difference Result 466 states and 1205 transitions. [2021-06-05 21:17:20,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:17:20,722 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:17:20,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:20,724 INFO L225 Difference]: With dead ends: 466 [2021-06-05 21:17:20,724 INFO L226 Difference]: Without dead ends: 464 [2021-06-05 21:17:20,724 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 53.9ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:17:20,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-06-05 21:17:20,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 360. [2021-06-05 21:17:20,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 2.9442896935933147) internal successors, (1057), 359 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:20,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1057 transitions. [2021-06-05 21:17:20,734 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1057 transitions. Word has length 16 [2021-06-05 21:17:20,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:20,734 INFO L482 AbstractCegarLoop]: Abstraction has 360 states and 1057 transitions. [2021-06-05 21:17:20,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:20,734 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1057 transitions. [2021-06-05 21:17:20,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:17:20,735 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:20,735 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:20,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable80 [2021-06-05 21:17:20,949 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:20,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:20,949 INFO L82 PathProgramCache]: Analyzing trace with hash -2101909835, now seen corresponding path program 32 times [2021-06-05 21:17:20,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:20,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018135277] [2021-06-05 21:17:20,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:20,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:20,988 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:20,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:20,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018135277] [2021-06-05 21:17:20,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018135277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:20,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050167066] [2021-06-05 21:17:20,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:21,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:17:21,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:21,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:17:21,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:21,048 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:21,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050167066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:21,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:21,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:17:21,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541493906] [2021-06-05 21:17:21,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:17:21,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:21,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:17:21,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:17:21,049 INFO L87 Difference]: Start difference. First operand 360 states and 1057 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:21,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:21,092 INFO L93 Difference]: Finished difference Result 501 states and 1267 transitions. [2021-06-05 21:17:21,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:17:21,094 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:17:21,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:21,097 INFO L225 Difference]: With dead ends: 501 [2021-06-05 21:17:21,098 INFO L226 Difference]: Without dead ends: 501 [2021-06-05 21:17:21,098 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 35.5ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:17:21,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-06-05 21:17:21,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 362. [2021-06-05 21:17:21,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.9445983379501386) internal successors, (1063), 361 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:21,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1063 transitions. [2021-06-05 21:17:21,109 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1063 transitions. Word has length 16 [2021-06-05 21:17:21,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:21,109 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 1063 transitions. [2021-06-05 21:17:21,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:21,109 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1063 transitions. [2021-06-05 21:17:21,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:17:21,110 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:21,110 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:21,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:21,325 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:21,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:21,325 INFO L82 PathProgramCache]: Analyzing trace with hash 464010127, now seen corresponding path program 33 times [2021-06-05 21:17:21,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:21,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416664886] [2021-06-05 21:17:21,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:21,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:21,360 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:21,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:21,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416664886] [2021-06-05 21:17:21,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416664886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:21,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164653550] [2021-06-05 21:17:21,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:21,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:17:21,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:21,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:17:21,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:21,432 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:21,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164653550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:21,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:21,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 21:17:21,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911252110] [2021-06-05 21:17:21,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:17:21,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:21,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:17:21,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:17:21,434 INFO L87 Difference]: Start difference. First operand 362 states and 1063 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:21,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:21,496 INFO L93 Difference]: Finished difference Result 535 states and 1337 transitions. [2021-06-05 21:17:21,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:17:21,497 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:17:21,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:21,499 INFO L225 Difference]: With dead ends: 535 [2021-06-05 21:17:21,499 INFO L226 Difference]: Without dead ends: 535 [2021-06-05 21:17:21,499 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 49.5ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:17:21,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-06-05 21:17:21,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 337. [2021-06-05 21:17:21,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.8988095238095237) internal successors, (974), 336 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:21,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 974 transitions. [2021-06-05 21:17:21,509 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 974 transitions. Word has length 16 [2021-06-05 21:17:21,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:21,509 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 974 transitions. [2021-06-05 21:17:21,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:21,509 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 974 transitions. [2021-06-05 21:17:21,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:17:21,510 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:21,510 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:21,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2021-06-05 21:17:21,732 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:21,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:21,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1104154371, now seen corresponding path program 34 times [2021-06-05 21:17:21,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:21,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465212785] [2021-06-05 21:17:21,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:21,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:21,769 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:21,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:21,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465212785] [2021-06-05 21:17:21,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465212785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:21,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827595640] [2021-06-05 21:17:21,769 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:21,791 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:17:21,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:21,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:17:21,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:21,821 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:21,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827595640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:21,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:21,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:17:21,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647845373] [2021-06-05 21:17:21,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:17:21,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:21,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:17:21,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:17:21,822 INFO L87 Difference]: Start difference. First operand 337 states and 974 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:21,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:21,917 INFO L93 Difference]: Finished difference Result 456 states and 1159 transitions. [2021-06-05 21:17:21,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:17:21,917 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:17:21,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:21,919 INFO L225 Difference]: With dead ends: 456 [2021-06-05 21:17:21,919 INFO L226 Difference]: Without dead ends: 454 [2021-06-05 21:17:21,919 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 53.1ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:17:21,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-06-05 21:17:21,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 348. [2021-06-05 21:17:21,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.893371757925072) internal successors, (1004), 347 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:21,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1004 transitions. [2021-06-05 21:17:21,929 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1004 transitions. Word has length 16 [2021-06-05 21:17:21,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:21,929 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1004 transitions. [2021-06-05 21:17:21,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:21,929 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1004 transitions. [2021-06-05 21:17:21,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:17:21,930 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:21,930 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:22,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:22,145 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:22,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:22,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1473063865, now seen corresponding path program 35 times [2021-06-05 21:17:22,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:22,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961575364] [2021-06-05 21:17:22,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:22,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:22,185 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:22,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:22,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961575364] [2021-06-05 21:17:22,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961575364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:22,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454626652] [2021-06-05 21:17:22,185 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:22,212 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:17:22,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:22,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:17:22,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:22,250 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:22,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454626652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:22,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:22,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:17:22,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454127284] [2021-06-05 21:17:22,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:17:22,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:22,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:17:22,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:17:22,251 INFO L87 Difference]: Start difference. First operand 348 states and 1004 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:22,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:22,284 INFO L93 Difference]: Finished difference Result 447 states and 1123 transitions. [2021-06-05 21:17:22,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:17:22,285 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:17:22,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:22,287 INFO L225 Difference]: With dead ends: 447 [2021-06-05 21:17:22,287 INFO L226 Difference]: Without dead ends: 447 [2021-06-05 21:17:22,287 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 33.0ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:17:22,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-06-05 21:17:22,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 336. [2021-06-05 21:17:22,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.8656716417910446) internal successors, (960), 335 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:22,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 960 transitions. [2021-06-05 21:17:22,296 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 960 transitions. Word has length 16 [2021-06-05 21:17:22,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:22,296 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 960 transitions. [2021-06-05 21:17:22,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:22,296 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 960 transitions. [2021-06-05 21:17:22,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:17:22,297 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:22,297 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:22,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-06-05 21:17:22,517 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:22,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:22,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1092856097, now seen corresponding path program 36 times [2021-06-05 21:17:22,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:22,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491191685] [2021-06-05 21:17:22,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:22,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:22,565 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:22,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:22,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491191685] [2021-06-05 21:17:22,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491191685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:22,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693501294] [2021-06-05 21:17:22,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:22,588 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:17:22,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:22,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:17:22,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:22,634 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:22,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693501294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:22,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:22,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:17:22,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433408982] [2021-06-05 21:17:22,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:17:22,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:22,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:17:22,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:17:22,635 INFO L87 Difference]: Start difference. First operand 336 states and 960 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:22,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:22,693 INFO L93 Difference]: Finished difference Result 482 states and 1184 transitions. [2021-06-05 21:17:22,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:17:22,693 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:17:22,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:22,695 INFO L225 Difference]: With dead ends: 482 [2021-06-05 21:17:22,695 INFO L226 Difference]: Without dead ends: 482 [2021-06-05 21:17:22,695 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 47.8ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:17:22,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-06-05 21:17:22,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 310. [2021-06-05 21:17:22,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.822006472491909) internal successors, (872), 309 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:22,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 872 transitions. [2021-06-05 21:17:22,705 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 872 transitions. Word has length 16 [2021-06-05 21:17:22,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:22,705 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 872 transitions. [2021-06-05 21:17:22,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:22,705 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 872 transitions. [2021-06-05 21:17:22,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:17:22,706 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:22,706 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:22,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-06-05 21:17:22,929 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:22,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:22,929 INFO L82 PathProgramCache]: Analyzing trace with hash -968003705, now seen corresponding path program 37 times [2021-06-05 21:17:22,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:22,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309577997] [2021-06-05 21:17:22,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:22,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:22,971 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:22,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:22,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309577997] [2021-06-05 21:17:22,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309577997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:22,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750826253] [2021-06-05 21:17:22,972 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:23,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:23,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:17:23,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:23,036 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:23,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750826253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:23,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:23,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:17:23,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975381384] [2021-06-05 21:17:23,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:17:23,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:23,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:17:23,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:17:23,037 INFO L87 Difference]: Start difference. First operand 310 states and 872 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:23,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:23,129 INFO L93 Difference]: Finished difference Result 536 states and 1380 transitions. [2021-06-05 21:17:23,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:17:23,130 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:17:23,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:23,132 INFO L225 Difference]: With dead ends: 536 [2021-06-05 21:17:23,132 INFO L226 Difference]: Without dead ends: 536 [2021-06-05 21:17:23,132 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 70.5ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:17:23,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-06-05 21:17:23,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 382. [2021-06-05 21:17:23,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 2.9448818897637796) internal successors, (1122), 381 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:23,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1122 transitions. [2021-06-05 21:17:23,142 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1122 transitions. Word has length 16 [2021-06-05 21:17:23,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:23,142 INFO L482 AbstractCegarLoop]: Abstraction has 382 states and 1122 transitions. [2021-06-05 21:17:23,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:23,142 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1122 transitions. [2021-06-05 21:17:23,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:17:23,143 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:23,143 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:23,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:23,357 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:23,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:23,357 INFO L82 PathProgramCache]: Analyzing trace with hash -557719857, now seen corresponding path program 38 times [2021-06-05 21:17:23,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:23,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604143498] [2021-06-05 21:17:23,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:23,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:23,391 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:23,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:23,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604143498] [2021-06-05 21:17:23,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604143498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:23,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803004179] [2021-06-05 21:17:23,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:23,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:17:23,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:23,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:17:23,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:23,449 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:23,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803004179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:23,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:23,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:17:23,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657168065] [2021-06-05 21:17:23,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:17:23,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:23,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:17:23,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:17:23,450 INFO L87 Difference]: Start difference. First operand 382 states and 1122 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:23,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:23,557 INFO L93 Difference]: Finished difference Result 493 states and 1315 transitions. [2021-06-05 21:17:23,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:17:23,557 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:17:23,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:23,559 INFO L225 Difference]: With dead ends: 493 [2021-06-05 21:17:23,559 INFO L226 Difference]: Without dead ends: 489 [2021-06-05 21:17:23,559 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 60.3ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:17:23,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-06-05 21:17:23,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 406. [2021-06-05 21:17:23,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.9703703703703703) internal successors, (1203), 405 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:23,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1203 transitions. [2021-06-05 21:17:23,567 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1203 transitions. Word has length 16 [2021-06-05 21:17:23,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:23,568 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 1203 transitions. [2021-06-05 21:17:23,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:23,568 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1203 transitions. [2021-06-05 21:17:23,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:17:23,569 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:23,569 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:23,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-05 21:17:23,785 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:23,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:23,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1852698447, now seen corresponding path program 39 times [2021-06-05 21:17:23,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:23,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699950678] [2021-06-05 21:17:23,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:23,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:23,822 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:23,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:23,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699950678] [2021-06-05 21:17:23,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699950678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:23,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569210539] [2021-06-05 21:17:23,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:23,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:17:23,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:23,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:17:23,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:23,893 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:23,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569210539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:23,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:23,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:17:23,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181935459] [2021-06-05 21:17:23,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:17:23,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:23,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:17:23,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:17:23,894 INFO L87 Difference]: Start difference. First operand 406 states and 1203 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:23,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:23,990 INFO L93 Difference]: Finished difference Result 566 states and 1493 transitions. [2021-06-05 21:17:23,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:17:23,991 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:17:23,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:23,993 INFO L225 Difference]: With dead ends: 566 [2021-06-05 21:17:23,993 INFO L226 Difference]: Without dead ends: 566 [2021-06-05 21:17:23,994 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 75.1ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:17:23,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-06-05 21:17:24,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 372. [2021-06-05 21:17:24,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 2.91644204851752) internal successors, (1082), 371 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:24,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1082 transitions. [2021-06-05 21:17:24,001 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1082 transitions. Word has length 16 [2021-06-05 21:17:24,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:24,003 INFO L482 AbstractCegarLoop]: Abstraction has 372 states and 1082 transitions. [2021-06-05 21:17:24,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:24,003 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1082 transitions. [2021-06-05 21:17:24,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:17:24,004 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:24,004 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:24,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:24,226 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:24,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:24,226 INFO L82 PathProgramCache]: Analyzing trace with hash -876457039, now seen corresponding path program 40 times [2021-06-05 21:17:24,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:24,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447139811] [2021-06-05 21:17:24,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:24,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:24,282 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:24,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:24,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447139811] [2021-06-05 21:17:24,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447139811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:24,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019230908] [2021-06-05 21:17:24,284 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:24,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:17:24,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:24,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:17:24,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:24,341 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:24,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019230908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:24,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:24,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:17:24,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039556440] [2021-06-05 21:17:24,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:17:24,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:24,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:17:24,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:17:24,343 INFO L87 Difference]: Start difference. First operand 372 states and 1082 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:24,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:24,429 INFO L93 Difference]: Finished difference Result 471 states and 1219 transitions. [2021-06-05 21:17:24,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:17:24,429 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:17:24,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:24,431 INFO L225 Difference]: With dead ends: 471 [2021-06-05 21:17:24,431 INFO L226 Difference]: Without dead ends: 467 [2021-06-05 21:17:24,431 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 70.3ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:17:24,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-06-05 21:17:24,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 379. [2021-06-05 21:17:24,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 2.9153439153439153) internal successors, (1102), 378 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:24,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1102 transitions. [2021-06-05 21:17:24,439 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1102 transitions. Word has length 16 [2021-06-05 21:17:24,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:24,439 INFO L482 AbstractCegarLoop]: Abstraction has 379 states and 1102 transitions. [2021-06-05 21:17:24,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:24,439 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1102 transitions. [2021-06-05 21:17:24,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:17:24,440 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:24,440 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:24,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 21:17:24,656 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:24,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:24,656 INFO L82 PathProgramCache]: Analyzing trace with hash 841292021, now seen corresponding path program 41 times [2021-06-05 21:17:24,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:24,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868994506] [2021-06-05 21:17:24,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:24,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:24,696 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:24,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:24,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868994506] [2021-06-05 21:17:24,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868994506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:24,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935879358] [2021-06-05 21:17:24,697 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:24,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:17:24,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:24,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:17:24,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:24,752 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:24,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935879358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:24,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:24,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:17:24,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039654844] [2021-06-05 21:17:24,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:17:24,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:24,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:17:24,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:17:24,753 INFO L87 Difference]: Start difference. First operand 379 states and 1102 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:24,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:24,795 INFO L93 Difference]: Finished difference Result 489 states and 1264 transitions. [2021-06-05 21:17:24,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:17:24,795 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:17:24,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:24,797 INFO L225 Difference]: With dead ends: 489 [2021-06-05 21:17:24,797 INFO L226 Difference]: Without dead ends: 489 [2021-06-05 21:17:24,797 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 38.3ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:17:24,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-06-05 21:17:24,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 380. [2021-06-05 21:17:24,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 2.9155672823219) internal successors, (1105), 379 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:24,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1105 transitions. [2021-06-05 21:17:24,805 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1105 transitions. Word has length 16 [2021-06-05 21:17:24,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:24,805 INFO L482 AbstractCegarLoop]: Abstraction has 380 states and 1105 transitions. [2021-06-05 21:17:24,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:24,805 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1105 transitions. [2021-06-05 21:17:24,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:17:24,806 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:24,806 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:25,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:25,028 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:25,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:25,028 INFO L82 PathProgramCache]: Analyzing trace with hash -887755313, now seen corresponding path program 42 times [2021-06-05 21:17:25,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:25,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652367435] [2021-06-05 21:17:25,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:25,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:25,065 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:25,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:25,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652367435] [2021-06-05 21:17:25,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652367435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:25,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173208289] [2021-06-05 21:17:25,066 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:25,086 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:17:25,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:25,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:17:25,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:25,125 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:25,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173208289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:25,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:25,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 21:17:25,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040926960] [2021-06-05 21:17:25,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:17:25,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:25,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:17:25,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:17:25,126 INFO L87 Difference]: Start difference. First operand 380 states and 1105 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:25,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:25,175 INFO L93 Difference]: Finished difference Result 456 states and 1186 transitions. [2021-06-05 21:17:25,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:17:25,175 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:17:25,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:25,180 INFO L225 Difference]: With dead ends: 456 [2021-06-05 21:17:25,181 INFO L226 Difference]: Without dead ends: 456 [2021-06-05 21:17:25,181 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 44.5ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:17:25,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-06-05 21:17:25,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 359. [2021-06-05 21:17:25,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 2.8910614525139664) internal successors, (1035), 358 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:25,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 1035 transitions. [2021-06-05 21:17:25,189 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 1035 transitions. Word has length 16 [2021-06-05 21:17:25,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:25,189 INFO L482 AbstractCegarLoop]: Abstraction has 359 states and 1035 transitions. [2021-06-05 21:17:25,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:25,189 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 1035 transitions. [2021-06-05 21:17:25,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:17:25,190 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:25,190 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:25,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:25,405 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:25,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:25,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1346352181, now seen corresponding path program 43 times [2021-06-05 21:17:25,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:25,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194123101] [2021-06-05 21:17:25,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:25,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:25,447 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:25,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:25,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194123101] [2021-06-05 21:17:25,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194123101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:25,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141857680] [2021-06-05 21:17:25,447 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:25,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:25,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:17:25,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:25,523 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:25,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141857680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:25,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:25,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 21:17:25,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004410315] [2021-06-05 21:17:25,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:17:25,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:25,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:17:25,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:17:25,524 INFO L87 Difference]: Start difference. First operand 359 states and 1035 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:25,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:25,612 INFO L93 Difference]: Finished difference Result 466 states and 1194 transitions. [2021-06-05 21:17:25,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:17:25,612 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:17:25,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:25,614 INFO L225 Difference]: With dead ends: 466 [2021-06-05 21:17:25,614 INFO L226 Difference]: Without dead ends: 466 [2021-06-05 21:17:25,614 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 78.3ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:17:25,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-06-05 21:17:25,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 341. [2021-06-05 21:17:25,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.864705882352941) internal successors, (974), 340 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:25,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 974 transitions. [2021-06-05 21:17:25,625 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 974 transitions. Word has length 16 [2021-06-05 21:17:25,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:25,625 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 974 transitions. [2021-06-05 21:17:25,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:25,625 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 974 transitions. [2021-06-05 21:17:25,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:17:25,627 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:25,627 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:25,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:25,841 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:25,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:25,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1884207759, now seen corresponding path program 44 times [2021-06-05 21:17:25,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:25,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276876846] [2021-06-05 21:17:25,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:25,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:25,893 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:25,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:25,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276876846] [2021-06-05 21:17:25,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276876846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:25,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029052489] [2021-06-05 21:17:25,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:25,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:17:25,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:25,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:17:25,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:25,959 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:25,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029052489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:25,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:25,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 21:17:25,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361775331] [2021-06-05 21:17:25,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:17:25,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:25,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:17:25,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:17:25,961 INFO L87 Difference]: Start difference. First operand 341 states and 974 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:26,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:26,089 INFO L93 Difference]: Finished difference Result 533 states and 1377 transitions. [2021-06-05 21:17:26,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:17:26,089 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:17:26,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:26,091 INFO L225 Difference]: With dead ends: 533 [2021-06-05 21:17:26,091 INFO L226 Difference]: Without dead ends: 533 [2021-06-05 21:17:26,091 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 105.8ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:17:26,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-06-05 21:17:26,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 403. [2021-06-05 21:17:26,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.9203980099502487) internal successors, (1174), 402 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:26,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1174 transitions. [2021-06-05 21:17:26,099 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1174 transitions. Word has length 16 [2021-06-05 21:17:26,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:26,099 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 1174 transitions. [2021-06-05 21:17:26,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:26,100 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1174 transitions. [2021-06-05 21:17:26,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:17:26,101 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:26,101 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:26,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:26,323 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:26,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:26,324 INFO L82 PathProgramCache]: Analyzing trace with hash 984700935, now seen corresponding path program 45 times [2021-06-05 21:17:26,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:26,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317357625] [2021-06-05 21:17:26,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:26,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:26,377 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:26,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:26,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317357625] [2021-06-05 21:17:26,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317357625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:26,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465788116] [2021-06-05 21:17:26,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:26,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:17:26,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:26,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:17:26,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:26,451 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:26,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465788116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:26,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:26,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-06-05 21:17:26,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436016803] [2021-06-05 21:17:26,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:17:26,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:26,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:17:26,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:17:26,452 INFO L87 Difference]: Start difference. First operand 403 states and 1174 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:26,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:26,605 INFO L93 Difference]: Finished difference Result 489 states and 1285 transitions. [2021-06-05 21:17:26,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:17:26,605 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:17:26,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:26,607 INFO L225 Difference]: With dead ends: 489 [2021-06-05 21:17:26,607 INFO L226 Difference]: Without dead ends: 485 [2021-06-05 21:17:26,608 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 117.3ms TimeCoverageRelationStatistics Valid=119, Invalid=223, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:17:26,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-06-05 21:17:26,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 391. [2021-06-05 21:17:26,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 2.9) internal successors, (1131), 390 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:26,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 1131 transitions. [2021-06-05 21:17:26,615 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 1131 transitions. Word has length 16 [2021-06-05 21:17:26,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:26,615 INFO L482 AbstractCegarLoop]: Abstraction has 391 states and 1131 transitions. [2021-06-05 21:17:26,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:26,615 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 1131 transitions. [2021-06-05 21:17:26,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:17:26,616 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:26,616 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:26,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-06-05 21:17:26,833 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:26,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:26,833 INFO L82 PathProgramCache]: Analyzing trace with hash -868338745, now seen corresponding path program 46 times [2021-06-05 21:17:26,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:26,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833453474] [2021-06-05 21:17:26,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:26,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:26,883 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:26,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:26,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833453474] [2021-06-05 21:17:26,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833453474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:26,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727452172] [2021-06-05 21:17:26,884 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:26,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:17:26,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:26,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:17:26,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:26,954 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:26,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727452172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:26,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:26,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 21:17:26,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954788860] [2021-06-05 21:17:26,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:17:26,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:26,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:17:26,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:17:26,955 INFO L87 Difference]: Start difference. First operand 391 states and 1131 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:27,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:27,113 INFO L93 Difference]: Finished difference Result 523 states and 1384 transitions. [2021-06-05 21:17:27,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:17:27,113 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:17:27,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:27,118 INFO L225 Difference]: With dead ends: 523 [2021-06-05 21:17:27,118 INFO L226 Difference]: Without dead ends: 523 [2021-06-05 21:17:27,119 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 128.4ms TimeCoverageRelationStatistics Valid=168, Invalid=338, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:17:27,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-06-05 21:17:27,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 386. [2021-06-05 21:17:27,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.8935064935064934) internal successors, (1114), 385 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:27,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1114 transitions. [2021-06-05 21:17:27,127 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1114 transitions. Word has length 16 [2021-06-05 21:17:27,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:27,127 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 1114 transitions. [2021-06-05 21:17:27,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:27,127 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1114 transitions. [2021-06-05 21:17:27,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:17:27,128 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:27,128 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:27,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:27,350 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:27,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:27,350 INFO L82 PathProgramCache]: Analyzing trace with hash -2145868605, now seen corresponding path program 47 times [2021-06-05 21:17:27,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:27,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182039491] [2021-06-05 21:17:27,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:27,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:27,403 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:27,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:27,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182039491] [2021-06-05 21:17:27,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182039491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:27,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644220793] [2021-06-05 21:17:27,404 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:27,443 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:17:27,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:27,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:17:27,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:27,477 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:27,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644220793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:27,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:27,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2021-06-05 21:17:27,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954096110] [2021-06-05 21:17:27,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:17:27,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:27,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:17:27,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:17:27,479 INFO L87 Difference]: Start difference. First operand 386 states and 1114 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:27,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:27,576 INFO L93 Difference]: Finished difference Result 454 states and 1208 transitions. [2021-06-05 21:17:27,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:17:27,577 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:17:27,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:27,579 INFO L225 Difference]: With dead ends: 454 [2021-06-05 21:17:27,579 INFO L226 Difference]: Without dead ends: 452 [2021-06-05 21:17:27,579 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 82.0ms TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:17:27,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-06-05 21:17:27,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 395. [2021-06-05 21:17:27,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.8984771573604062) internal successors, (1142), 394 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:27,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1142 transitions. [2021-06-05 21:17:27,586 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1142 transitions. Word has length 16 [2021-06-05 21:17:27,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:27,586 INFO L482 AbstractCegarLoop]: Abstraction has 395 states and 1142 transitions. [2021-06-05 21:17:27,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:27,587 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1142 transitions. [2021-06-05 21:17:27,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:17:27,587 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:27,587 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:27,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:27,810 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:27,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:27,811 INFO L82 PathProgramCache]: Analyzing trace with hash -428119545, now seen corresponding path program 48 times [2021-06-05 21:17:27,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:27,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30354262] [2021-06-05 21:17:27,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:27,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:27,858 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:27,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:27,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30354262] [2021-06-05 21:17:27,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30354262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:27,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302622217] [2021-06-05 21:17:27,858 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:27,882 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:17:27,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:27,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:17:27,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:27,921 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:27,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302622217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:27,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:27,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2021-06-05 21:17:27,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590179328] [2021-06-05 21:17:27,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:17:27,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:27,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:17:27,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:17:27,922 INFO L87 Difference]: Start difference. First operand 395 states and 1142 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:28,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:28,013 INFO L93 Difference]: Finished difference Result 476 states and 1251 transitions. [2021-06-05 21:17:28,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:17:28,013 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:17:28,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:28,014 INFO L225 Difference]: With dead ends: 476 [2021-06-05 21:17:28,014 INFO L226 Difference]: Without dead ends: 476 [2021-06-05 21:17:28,015 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 86.4ms TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:17:28,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-06-05 21:17:28,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 396. [2021-06-05 21:17:28,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.8936708860759492) internal successors, (1143), 395 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:28,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1143 transitions. [2021-06-05 21:17:28,022 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1143 transitions. Word has length 16 [2021-06-05 21:17:28,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:28,023 INFO L482 AbstractCegarLoop]: Abstraction has 396 states and 1143 transitions. [2021-06-05 21:17:28,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:28,023 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1143 transitions. [2021-06-05 21:17:28,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:17:28,023 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:28,024 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:28,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-06-05 21:17:28,245 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:28,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:28,245 INFO L82 PathProgramCache]: Analyzing trace with hash 2137800417, now seen corresponding path program 49 times [2021-06-05 21:17:28,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:28,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766756063] [2021-06-05 21:17:28,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:28,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:28,292 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:28,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:28,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766756063] [2021-06-05 21:17:28,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766756063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:28,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307492852] [2021-06-05 21:17:28,292 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:28,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:28,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:17:28,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:28,359 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:28,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307492852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:28,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:28,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 21:17:28,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571658854] [2021-06-05 21:17:28,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:17:28,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:28,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:17:28,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:17:28,360 INFO L87 Difference]: Start difference. First operand 396 states and 1143 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:28,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:28,468 INFO L93 Difference]: Finished difference Result 482 states and 1265 transitions. [2021-06-05 21:17:28,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:17:28,469 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:17:28,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:28,470 INFO L225 Difference]: With dead ends: 482 [2021-06-05 21:17:28,470 INFO L226 Difference]: Without dead ends: 482 [2021-06-05 21:17:28,470 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 99.7ms TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:17:28,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-06-05 21:17:28,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 397. [2021-06-05 21:17:28,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.893939393939394) internal successors, (1146), 396 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:28,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1146 transitions. [2021-06-05 21:17:28,478 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1146 transitions. Word has length 16 [2021-06-05 21:17:28,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:28,478 INFO L482 AbstractCegarLoop]: Abstraction has 397 states and 1146 transitions. [2021-06-05 21:17:28,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:28,478 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1146 transitions. [2021-06-05 21:17:28,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:17:28,479 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:28,479 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:28,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:28,701 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:28,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:28,701 INFO L82 PathProgramCache]: Analyzing trace with hash 76940615, now seen corresponding path program 50 times [2021-06-05 21:17:28,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:28,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471485170] [2021-06-05 21:17:28,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:28,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:28,753 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:28,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:28,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471485170] [2021-06-05 21:17:28,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471485170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:28,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187382412] [2021-06-05 21:17:28,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:28,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:17:28,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:28,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:17:28,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:28,827 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:28,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187382412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:28,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:28,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 21:17:28,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699850536] [2021-06-05 21:17:28,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:17:28,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:28,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:17:28,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:17:28,828 INFO L87 Difference]: Start difference. First operand 397 states and 1146 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:28,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:28,937 INFO L93 Difference]: Finished difference Result 476 states and 1290 transitions. [2021-06-05 21:17:28,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:17:28,937 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:17:28,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:28,939 INFO L225 Difference]: With dead ends: 476 [2021-06-05 21:17:28,939 INFO L226 Difference]: Without dead ends: 476 [2021-06-05 21:17:28,940 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 107.9ms TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:17:28,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-06-05 21:17:28,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 420. [2021-06-05 21:17:28,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 2.911694510739857) internal successors, (1220), 419 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:28,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1220 transitions. [2021-06-05 21:17:28,947 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1220 transitions. Word has length 16 [2021-06-05 21:17:28,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:28,947 INFO L482 AbstractCegarLoop]: Abstraction has 420 states and 1220 transitions. [2021-06-05 21:17:28,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:28,947 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1220 transitions. [2021-06-05 21:17:28,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:17:28,948 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:28,948 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:29,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-05 21:17:29,157 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:29,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:29,157 INFO L82 PathProgramCache]: Analyzing trace with hash 614796193, now seen corresponding path program 51 times [2021-06-05 21:17:29,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:29,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336695109] [2021-06-05 21:17:29,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:29,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:29,205 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:29,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:29,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336695109] [2021-06-05 21:17:29,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336695109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:29,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640068372] [2021-06-05 21:17:29,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:29,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:17:29,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:29,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:17:29,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:29,283 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:29,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640068372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:29,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:29,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 21:17:29,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456984561] [2021-06-05 21:17:29,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:17:29,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:29,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:17:29,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:17:29,284 INFO L87 Difference]: Start difference. First operand 420 states and 1220 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:29,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:29,405 INFO L93 Difference]: Finished difference Result 486 states and 1311 transitions. [2021-06-05 21:17:29,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:17:29,405 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:17:29,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:29,407 INFO L225 Difference]: With dead ends: 486 [2021-06-05 21:17:29,407 INFO L226 Difference]: Without dead ends: 486 [2021-06-05 21:17:29,407 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 121.8ms TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:17:29,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-06-05 21:17:29,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 416. [2021-06-05 21:17:29,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 2.908433734939759) internal successors, (1207), 415 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:29,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1207 transitions. [2021-06-05 21:17:29,413 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1207 transitions. Word has length 16 [2021-06-05 21:17:29,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:29,413 INFO L482 AbstractCegarLoop]: Abstraction has 416 states and 1207 transitions. [2021-06-05 21:17:29,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:29,413 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1207 transitions. [2021-06-05 21:17:29,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 21:17:29,414 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:29,414 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:29,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 21:17:29,614 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:29,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:29,614 INFO L82 PathProgramCache]: Analyzing trace with hash 108449927, now seen corresponding path program 52 times [2021-06-05 21:17:29,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:29,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400468007] [2021-06-05 21:17:29,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:29,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:29,682 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:29,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:29,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400468007] [2021-06-05 21:17:29,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400468007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:29,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835596908] [2021-06-05 21:17:29,682 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:29,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:17:29,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:29,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:17:29,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:29,784 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:29,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835596908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:29,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:29,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 21:17:29,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923851301] [2021-06-05 21:17:29,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:17:29,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:29,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:17:29,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:17:29,785 INFO L87 Difference]: Start difference. First operand 416 states and 1207 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:29,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:29,985 INFO L93 Difference]: Finished difference Result 533 states and 1453 transitions. [2021-06-05 21:17:29,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:17:29,985 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 21:17:29,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:29,987 INFO L225 Difference]: With dead ends: 533 [2021-06-05 21:17:29,987 INFO L226 Difference]: Without dead ends: 533 [2021-06-05 21:17:29,987 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 194.0ms TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:17:29,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-06-05 21:17:30,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 424. [2021-06-05 21:17:30,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 2.9125295508274234) internal successors, (1232), 423 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:30,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 1232 transitions. [2021-06-05 21:17:30,007 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 1232 transitions. Word has length 16 [2021-06-05 21:17:30,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:30,007 INFO L482 AbstractCegarLoop]: Abstraction has 424 states and 1232 transitions. [2021-06-05 21:17:30,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:30,007 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 1232 transitions. [2021-06-05 21:17:30,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:17:30,008 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:30,008 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:30,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 21:17:30,211 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:30,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:30,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1580915834, now seen corresponding path program 53 times [2021-06-05 21:17:30,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:30,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333278278] [2021-06-05 21:17:30,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:30,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:30,264 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:30,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:30,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333278278] [2021-06-05 21:17:30,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333278278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:30,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569474561] [2021-06-05 21:17:30,265 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:30,300 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:17:30,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:30,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:17:30,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:30,389 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:30,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569474561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:30,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:30,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 21:17:30,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418871698] [2021-06-05 21:17:30,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:17:30,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:30,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:17:30,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:17:30,390 INFO L87 Difference]: Start difference. First operand 424 states and 1232 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:30,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:30,534 INFO L93 Difference]: Finished difference Result 523 states and 1364 transitions. [2021-06-05 21:17:30,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:17:30,535 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:17:30,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:30,537 INFO L225 Difference]: With dead ends: 523 [2021-06-05 21:17:30,537 INFO L226 Difference]: Without dead ends: 517 [2021-06-05 21:17:30,537 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 134.8ms TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:17:30,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-06-05 21:17:30,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 417. [2021-06-05 21:17:30,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 2.8774038461538463) internal successors, (1197), 416 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:30,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 1197 transitions. [2021-06-05 21:17:30,544 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 1197 transitions. Word has length 17 [2021-06-05 21:17:30,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:30,544 INFO L482 AbstractCegarLoop]: Abstraction has 417 states and 1197 transitions. [2021-06-05 21:17:30,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:30,544 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 1197 transitions. [2021-06-05 21:17:30,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:17:30,545 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:30,545 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:30,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 21:17:30,768 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:30,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:30,768 INFO L82 PathProgramCache]: Analyzing trace with hash 237372592, now seen corresponding path program 54 times [2021-06-05 21:17:30,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:30,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030889951] [2021-06-05 21:17:30,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:30,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:30,815 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:30,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:30,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030889951] [2021-06-05 21:17:30,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030889951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:30,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336722039] [2021-06-05 21:17:30,815 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:30,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:17:30,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:30,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:17:30,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:30,879 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:30,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336722039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:30,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:30,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:17:30,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902807423] [2021-06-05 21:17:30,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:17:30,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:30,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:17:30,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:17:30,881 INFO L87 Difference]: Start difference. First operand 417 states and 1197 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:30,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:30,965 INFO L93 Difference]: Finished difference Result 436 states and 1230 transitions. [2021-06-05 21:17:30,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:17:30,965 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:17:30,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:30,967 INFO L225 Difference]: With dead ends: 436 [2021-06-05 21:17:30,967 INFO L226 Difference]: Without dead ends: 434 [2021-06-05 21:17:30,967 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 69.7ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:17:30,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-06-05 21:17:30,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 417. [2021-06-05 21:17:30,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 2.8677884615384617) internal successors, (1193), 416 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:30,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 1193 transitions. [2021-06-05 21:17:30,973 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 1193 transitions. Word has length 17 [2021-06-05 21:17:30,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:30,973 INFO L482 AbstractCegarLoop]: Abstraction has 417 states and 1193 transitions. [2021-06-05 21:17:30,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:30,974 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 1193 transitions. [2021-06-05 21:17:30,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:17:30,974 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:30,974 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:31,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 21:17:31,177 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:31,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:31,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1705117860, now seen corresponding path program 55 times [2021-06-05 21:17:31,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:31,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807322307] [2021-06-05 21:17:31,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:31,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:31,213 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:31,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:31,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807322307] [2021-06-05 21:17:31,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807322307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:31,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470035918] [2021-06-05 21:17:31,213 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:31,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:31,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:17:31,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:31,275 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:17:31,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470035918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:31,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:31,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 21:17:31,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678396910] [2021-06-05 21:17:31,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:17:31,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:31,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:17:31,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:17:31,276 INFO L87 Difference]: Start difference. First operand 417 states and 1193 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:31,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:31,324 INFO L93 Difference]: Finished difference Result 505 states and 1323 transitions. [2021-06-05 21:17:31,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:17:31,324 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:17:31,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:31,337 INFO L225 Difference]: With dead ends: 505 [2021-06-05 21:17:31,337 INFO L226 Difference]: Without dead ends: 503 [2021-06-05 21:17:31,338 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 40.3ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:17:31,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-06-05 21:17:31,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 420. [2021-06-05 21:17:31,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 2.863961813842482) internal successors, (1200), 419 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:31,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1200 transitions. [2021-06-05 21:17:31,344 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1200 transitions. Word has length 17 [2021-06-05 21:17:31,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:31,345 INFO L482 AbstractCegarLoop]: Abstraction has 420 states and 1200 transitions. [2021-06-05 21:17:31,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:31,345 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1200 transitions. [2021-06-05 21:17:31,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:17:31,346 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:31,346 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:31,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-05 21:17:31,561 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:31,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:31,562 INFO L82 PathProgramCache]: Analyzing trace with hash -844394746, now seen corresponding path program 56 times [2021-06-05 21:17:31,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:31,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301385247] [2021-06-05 21:17:31,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:31,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:31,593 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:31,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:31,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301385247] [2021-06-05 21:17:31,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301385247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:31,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403850887] [2021-06-05 21:17:31,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:31,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:17:31,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:31,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:17:31,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:31,646 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:17:31,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403850887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:31,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:31,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-06-05 21:17:31,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337131028] [2021-06-05 21:17:31,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:17:31,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:31,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:17:31,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:17:31,647 INFO L87 Difference]: Start difference. First operand 420 states and 1200 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:31,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:31,703 INFO L93 Difference]: Finished difference Result 516 states and 1337 transitions. [2021-06-05 21:17:31,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:17:31,704 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:17:31,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:31,705 INFO L225 Difference]: With dead ends: 516 [2021-06-05 21:17:31,705 INFO L226 Difference]: Without dead ends: 515 [2021-06-05 21:17:31,705 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 46.6ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:17:31,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-06-05 21:17:31,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 415. [2021-06-05 21:17:31,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 2.845410628019324) internal successors, (1178), 414 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:31,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1178 transitions. [2021-06-05 21:17:31,710 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1178 transitions. Word has length 17 [2021-06-05 21:17:31,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:31,710 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 1178 transitions. [2021-06-05 21:17:31,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:31,710 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1178 transitions. [2021-06-05 21:17:31,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:17:31,711 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:31,711 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:31,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:31,929 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:31,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:31,929 INFO L82 PathProgramCache]: Analyzing trace with hash 866218562, now seen corresponding path program 57 times [2021-06-05 21:17:31,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:31,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420278443] [2021-06-05 21:17:31,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:31,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:31,972 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:31,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:31,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420278443] [2021-06-05 21:17:31,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420278443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:31,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850252] [2021-06-05 21:17:31,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 21:17:32,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:17:32,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:32,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:17:32,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:32,032 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:32,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:32,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:32,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:17:32,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626007663] [2021-06-05 21:17:32,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:17:32,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:32,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:17:32,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:17:32,033 INFO L87 Difference]: Start difference. First operand 415 states and 1178 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:32,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:32,119 INFO L93 Difference]: Finished difference Result 503 states and 1301 transitions. [2021-06-05 21:17:32,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:17:32,120 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:17:32,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:32,121 INFO L225 Difference]: With dead ends: 503 [2021-06-05 21:17:32,121 INFO L226 Difference]: Without dead ends: 500 [2021-06-05 21:17:32,121 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 65.0ms TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:17:32,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-06-05 21:17:32,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 412. [2021-06-05 21:17:32,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 2.834549878345499) internal successors, (1165), 411 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:32,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 1165 transitions. [2021-06-05 21:17:32,128 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 1165 transitions. Word has length 17 [2021-06-05 21:17:32,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:32,128 INFO L482 AbstractCegarLoop]: Abstraction has 412 states and 1165 transitions. [2021-06-05 21:17:32,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:32,128 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 1165 transitions. [2021-06-05 21:17:32,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:17:32,129 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:32,129 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:32,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 21:17:32,333 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:32,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:32,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1939343738, now seen corresponding path program 58 times [2021-06-05 21:17:32,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:32,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120501678] [2021-06-05 21:17:32,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:32,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:32,373 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:32,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:32,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120501678] [2021-06-05 21:17:32,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120501678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:32,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913762027] [2021-06-05 21:17:32,373 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:32,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:17:32,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:32,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:17:32,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:32,438 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:32,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913762027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:32,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:32,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-06-05 21:17:32,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282478309] [2021-06-05 21:17:32,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:17:32,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:32,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:17:32,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:17:32,439 INFO L87 Difference]: Start difference. First operand 412 states and 1165 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:32,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:32,564 INFO L93 Difference]: Finished difference Result 478 states and 1266 transitions. [2021-06-05 21:17:32,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:17:32,564 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:17:32,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:32,565 INFO L225 Difference]: With dead ends: 478 [2021-06-05 21:17:32,565 INFO L226 Difference]: Without dead ends: 474 [2021-06-05 21:17:32,565 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 84.9ms TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:17:32,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-06-05 21:17:32,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 412. [2021-06-05 21:17:32,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 2.8223844282238444) internal successors, (1160), 411 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:32,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 1160 transitions. [2021-06-05 21:17:32,573 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 1160 transitions. Word has length 17 [2021-06-05 21:17:32,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:32,573 INFO L482 AbstractCegarLoop]: Abstraction has 412 states and 1160 transitions. [2021-06-05 21:17:32,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:32,573 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 1160 transitions. [2021-06-05 21:17:32,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:17:32,574 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:32,574 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:32,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:32,789 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:32,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:32,789 INFO L82 PathProgramCache]: Analyzing trace with hash -275493550, now seen corresponding path program 59 times [2021-06-05 21:17:32,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:32,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603032196] [2021-06-05 21:17:32,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:32,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:32,826 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:32,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:32,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603032196] [2021-06-05 21:17:32,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603032196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:32,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169663410] [2021-06-05 21:17:32,827 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:32,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:17:32,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:32,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:17:32,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:32,913 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:17:32,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169663410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:32,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:32,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-06-05 21:17:32,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770707836] [2021-06-05 21:17:32,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:17:32,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:32,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:17:32,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:17:32,914 INFO L87 Difference]: Start difference. First operand 412 states and 1160 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:32,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:32,967 INFO L93 Difference]: Finished difference Result 508 states and 1297 transitions. [2021-06-05 21:17:32,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:17:32,968 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:17:32,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:32,969 INFO L225 Difference]: With dead ends: 508 [2021-06-05 21:17:32,969 INFO L226 Difference]: Without dead ends: 506 [2021-06-05 21:17:32,969 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 43.5ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:17:32,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-06-05 21:17:32,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 409. [2021-06-05 21:17:32,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.7965686274509802) internal successors, (1141), 408 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:32,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1141 transitions. [2021-06-05 21:17:32,976 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1141 transitions. Word has length 17 [2021-06-05 21:17:32,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:32,976 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 1141 transitions. [2021-06-05 21:17:32,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:32,976 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1141 transitions. [2021-06-05 21:17:32,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:17:32,977 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:32,977 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:33,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-06-05 21:17:33,192 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:33,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:33,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1114392848, now seen corresponding path program 60 times [2021-06-05 21:17:33,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:33,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460276123] [2021-06-05 21:17:33,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:33,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:33,237 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:33,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:33,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460276123] [2021-06-05 21:17:33,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460276123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:33,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454162082] [2021-06-05 21:17:33,237 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:33,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:17:33,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:33,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:17:33,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:33,299 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:33,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454162082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:33,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:33,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:17:33,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176756879] [2021-06-05 21:17:33,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:17:33,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:33,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:17:33,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:17:33,301 INFO L87 Difference]: Start difference. First operand 409 states and 1141 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:33,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:33,390 INFO L93 Difference]: Finished difference Result 497 states and 1266 transitions. [2021-06-05 21:17:33,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:17:33,390 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:17:33,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:33,391 INFO L225 Difference]: With dead ends: 497 [2021-06-05 21:17:33,391 INFO L226 Difference]: Without dead ends: 494 [2021-06-05 21:17:33,391 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 68.3ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:17:33,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-06-05 21:17:33,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 403. [2021-06-05 21:17:33,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.7761194029850746) internal successors, (1116), 402 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:33,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1116 transitions. [2021-06-05 21:17:33,396 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1116 transitions. Word has length 17 [2021-06-05 21:17:33,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:33,396 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 1116 transitions. [2021-06-05 21:17:33,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:33,397 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1116 transitions. [2021-06-05 21:17:33,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:17:33,397 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:33,397 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:33,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:33,598 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:33,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:33,598 INFO L82 PathProgramCache]: Analyzing trace with hash 375012148, now seen corresponding path program 61 times [2021-06-05 21:17:33,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:33,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408675233] [2021-06-05 21:17:33,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:33,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:33,647 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:33,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:33,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408675233] [2021-06-05 21:17:33,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408675233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:33,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187160269] [2021-06-05 21:17:33,647 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:33,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:33,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:17:33,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:33,706 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:33,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187160269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:33,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:33,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-06-05 21:17:33,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860748811] [2021-06-05 21:17:33,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:17:33,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:33,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:17:33,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:17:33,707 INFO L87 Difference]: Start difference. First operand 403 states and 1116 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:33,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:33,811 INFO L93 Difference]: Finished difference Result 496 states and 1249 transitions. [2021-06-05 21:17:33,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:17:33,811 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:17:33,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:33,812 INFO L225 Difference]: With dead ends: 496 [2021-06-05 21:17:33,812 INFO L226 Difference]: Without dead ends: 492 [2021-06-05 21:17:33,812 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 73.3ms TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:17:33,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-06-05 21:17:33,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 403. [2021-06-05 21:17:33,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.756218905472637) internal successors, (1108), 402 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:33,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1108 transitions. [2021-06-05 21:17:33,819 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1108 transitions. Word has length 17 [2021-06-05 21:17:33,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:33,819 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 1108 transitions. [2021-06-05 21:17:33,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:33,820 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1108 transitions. [2021-06-05 21:17:33,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:17:33,820 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:33,820 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:34,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:34,037 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:34,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:34,037 INFO L82 PathProgramCache]: Analyzing trace with hash -698073232, now seen corresponding path program 62 times [2021-06-05 21:17:34,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:34,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125199314] [2021-06-05 21:17:34,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:34,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:34,091 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:34,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:34,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125199314] [2021-06-05 21:17:34,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125199314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:34,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391892853] [2021-06-05 21:17:34,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:34,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:17:34,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:34,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:17:34,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:34,142 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:34,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391892853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:34,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:34,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-06-05 21:17:34,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699156234] [2021-06-05 21:17:34,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:17:34,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:34,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:17:34,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:17:34,143 INFO L87 Difference]: Start difference. First operand 403 states and 1108 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:34,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:34,223 INFO L93 Difference]: Finished difference Result 492 states and 1286 transitions. [2021-06-05 21:17:34,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:17:34,223 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:17:34,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:34,224 INFO L225 Difference]: With dead ends: 492 [2021-06-05 21:17:34,224 INFO L226 Difference]: Without dead ends: 486 [2021-06-05 21:17:34,224 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 75.0ms TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:17:34,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-06-05 21:17:34,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 404. [2021-06-05 21:17:34,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.7468982630272953) internal successors, (1107), 403 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:34,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1107 transitions. [2021-06-05 21:17:34,228 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1107 transitions. Word has length 17 [2021-06-05 21:17:34,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:34,228 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 1107 transitions. [2021-06-05 21:17:34,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:34,229 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1107 transitions. [2021-06-05 21:17:34,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:17:34,229 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:34,229 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:34,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:34,430 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:34,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:34,430 INFO L82 PathProgramCache]: Analyzing trace with hash -987391290, now seen corresponding path program 63 times [2021-06-05 21:17:34,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:34,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959949007] [2021-06-05 21:17:34,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:34,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:34,468 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:34,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:34,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959949007] [2021-06-05 21:17:34,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959949007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:34,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060988663] [2021-06-05 21:17:34,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:34,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:17:34,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:34,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:17:34,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:34,521 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:34,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060988663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:34,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:34,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:17:34,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133707011] [2021-06-05 21:17:34,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:17:34,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:34,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:17:34,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:17:34,522 INFO L87 Difference]: Start difference. First operand 404 states and 1107 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:34,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:34,596 INFO L93 Difference]: Finished difference Result 476 states and 1226 transitions. [2021-06-05 21:17:34,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:17:34,597 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:17:34,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:34,598 INFO L225 Difference]: With dead ends: 476 [2021-06-05 21:17:34,598 INFO L226 Difference]: Without dead ends: 476 [2021-06-05 21:17:34,598 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 59.1ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:17:34,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-06-05 21:17:34,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 405. [2021-06-05 21:17:34,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.7475247524752477) internal successors, (1110), 404 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:34,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1110 transitions. [2021-06-05 21:17:34,604 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1110 transitions. Word has length 17 [2021-06-05 21:17:34,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:34,604 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 1110 transitions. [2021-06-05 21:17:34,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:34,604 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1110 transitions. [2021-06-05 21:17:34,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:17:34,604 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:34,604 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:34,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 21:17:34,821 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:34,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:34,821 INFO L82 PathProgramCache]: Analyzing trace with hash 844347560, now seen corresponding path program 64 times [2021-06-05 21:17:34,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:34,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595704554] [2021-06-05 21:17:34,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:34,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:34,881 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:34,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:34,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595704554] [2021-06-05 21:17:34,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595704554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:34,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194624099] [2021-06-05 21:17:34,882 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:34,902 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:17:34,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:34,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:17:34,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:34,928 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:34,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194624099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:34,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:34,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-06-05 21:17:34,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629888299] [2021-06-05 21:17:34,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:17:34,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:34,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:17:34,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:17:34,929 INFO L87 Difference]: Start difference. First operand 405 states and 1110 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:35,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:35,018 INFO L93 Difference]: Finished difference Result 496 states and 1283 transitions. [2021-06-05 21:17:35,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:17:35,019 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:17:35,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:35,019 INFO L225 Difference]: With dead ends: 496 [2021-06-05 21:17:35,019 INFO L226 Difference]: Without dead ends: 490 [2021-06-05 21:17:35,020 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 80.2ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:17:35,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-06-05 21:17:35,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 405. [2021-06-05 21:17:35,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.735148514851485) internal successors, (1105), 404 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:35,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1105 transitions. [2021-06-05 21:17:35,025 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1105 transitions. Word has length 17 [2021-06-05 21:17:35,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:35,025 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 1105 transitions. [2021-06-05 21:17:35,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:35,025 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1105 transitions. [2021-06-05 21:17:35,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:17:35,026 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:35,026 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:35,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 21:17:35,233 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:35,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:35,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1544905116, now seen corresponding path program 65 times [2021-06-05 21:17:35,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:35,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895922302] [2021-06-05 21:17:35,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:35,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:35,268 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:35,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:35,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895922302] [2021-06-05 21:17:35,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895922302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:35,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453895188] [2021-06-05 21:17:35,268 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:35,290 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:17:35,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:35,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:17:35,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:35,319 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:17:35,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453895188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:35,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:35,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-06-05 21:17:35,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288748260] [2021-06-05 21:17:35,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:17:35,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:35,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:17:35,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:17:35,320 INFO L87 Difference]: Start difference. First operand 405 states and 1105 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:35,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:35,371 INFO L93 Difference]: Finished difference Result 538 states and 1315 transitions. [2021-06-05 21:17:35,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:17:35,371 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:17:35,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:35,372 INFO L225 Difference]: With dead ends: 538 [2021-06-05 21:17:35,372 INFO L226 Difference]: Without dead ends: 538 [2021-06-05 21:17:35,372 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 36.5ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:17:35,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-06-05 21:17:35,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 410. [2021-06-05 21:17:35,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.743276283618582) internal successors, (1122), 409 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:35,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1122 transitions. [2021-06-05 21:17:35,377 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1122 transitions. Word has length 17 [2021-06-05 21:17:35,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:35,377 INFO L482 AbstractCegarLoop]: Abstraction has 410 states and 1122 transitions. [2021-06-05 21:17:35,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:35,377 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1122 transitions. [2021-06-05 21:17:35,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:17:35,378 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:35,378 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:35,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 21:17:35,578 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:35,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:35,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1911162882, now seen corresponding path program 66 times [2021-06-05 21:17:35,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:35,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906482769] [2021-06-05 21:17:35,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:35,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:35,618 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:35,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:35,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906482769] [2021-06-05 21:17:35,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906482769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:35,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800807314] [2021-06-05 21:17:35,619 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:35,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:17:35,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:35,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:17:35,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:35,685 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:35,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800807314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:35,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:35,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:17:35,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388528675] [2021-06-05 21:17:35,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:17:35,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:35,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:17:35,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:17:35,686 INFO L87 Difference]: Start difference. First operand 410 states and 1122 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:35,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:35,763 INFO L93 Difference]: Finished difference Result 512 states and 1266 transitions. [2021-06-05 21:17:35,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:17:35,763 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:17:35,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:35,764 INFO L225 Difference]: With dead ends: 512 [2021-06-05 21:17:35,764 INFO L226 Difference]: Without dead ends: 510 [2021-06-05 21:17:35,764 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 58.9ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:17:35,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-06-05 21:17:35,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 410. [2021-06-05 21:17:35,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.7310513447432765) internal successors, (1117), 409 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:35,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1117 transitions. [2021-06-05 21:17:35,769 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1117 transitions. Word has length 17 [2021-06-05 21:17:35,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:35,769 INFO L482 AbstractCegarLoop]: Abstraction has 410 states and 1117 transitions. [2021-06-05 21:17:35,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:35,769 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1117 transitions. [2021-06-05 21:17:35,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:17:35,770 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:35,770 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:35,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:35,970 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:35,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:35,970 INFO L82 PathProgramCache]: Analyzing trace with hash -894399418, now seen corresponding path program 67 times [2021-06-05 21:17:35,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:35,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604440655] [2021-06-05 21:17:35,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:35,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:36,017 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:36,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:36,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604440655] [2021-06-05 21:17:36,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604440655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:36,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745335378] [2021-06-05 21:17:36,017 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:36,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:36,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:17:36,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:36,067 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:17:36,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745335378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:36,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:36,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-06-05 21:17:36,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928684788] [2021-06-05 21:17:36,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:17:36,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:36,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:17:36,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:17:36,068 INFO L87 Difference]: Start difference. First operand 410 states and 1117 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:36,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:36,154 INFO L93 Difference]: Finished difference Result 518 states and 1269 transitions. [2021-06-05 21:17:36,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:17:36,154 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:17:36,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:36,155 INFO L225 Difference]: With dead ends: 518 [2021-06-05 21:17:36,155 INFO L226 Difference]: Without dead ends: 514 [2021-06-05 21:17:36,155 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 71.5ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:17:36,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-06-05 21:17:36,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 410. [2021-06-05 21:17:36,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.7163814180929093) internal successors, (1111), 409 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:36,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1111 transitions. [2021-06-05 21:17:36,160 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1111 transitions. Word has length 17 [2021-06-05 21:17:36,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:36,160 INFO L482 AbstractCegarLoop]: Abstraction has 410 states and 1111 transitions. [2021-06-05 21:17:36,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:36,160 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1111 transitions. [2021-06-05 21:17:36,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:17:36,161 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:36,161 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:36,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-05 21:17:36,361 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:36,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:36,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1967484798, now seen corresponding path program 68 times [2021-06-05 21:17:36,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:36,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066487812] [2021-06-05 21:17:36,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:36,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:36,414 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:36,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:36,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066487812] [2021-06-05 21:17:36,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066487812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:36,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608078804] [2021-06-05 21:17:36,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:36,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:17:36,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:36,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:17:36,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:36,478 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:36,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608078804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:36,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:36,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-05 21:17:36,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476162289] [2021-06-05 21:17:36,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:17:36,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:36,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:17:36,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:17:36,479 INFO L87 Difference]: Start difference. First operand 410 states and 1111 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:36,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:36,615 INFO L93 Difference]: Finished difference Result 523 states and 1270 transitions. [2021-06-05 21:17:36,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:17:36,615 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:17:36,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:36,616 INFO L225 Difference]: With dead ends: 523 [2021-06-05 21:17:36,617 INFO L226 Difference]: Without dead ends: 517 [2021-06-05 21:17:36,617 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 100.2ms TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:17:36,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-06-05 21:17:36,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 411. [2021-06-05 21:17:36,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.7) internal successors, (1107), 410 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:36,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1107 transitions. [2021-06-05 21:17:36,629 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1107 transitions. Word has length 17 [2021-06-05 21:17:36,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:36,630 INFO L482 AbstractCegarLoop]: Abstraction has 411 states and 1107 transitions. [2021-06-05 21:17:36,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:36,630 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1107 transitions. [2021-06-05 21:17:36,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:17:36,630 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:36,630 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:36,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:36,851 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:36,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:36,851 INFO L82 PathProgramCache]: Analyzing trace with hash -873393210, now seen corresponding path program 69 times [2021-06-05 21:17:36,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:36,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868388998] [2021-06-05 21:17:36,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:36,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:36,900 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:36,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:36,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868388998] [2021-06-05 21:17:36,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868388998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:36,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518833521] [2021-06-05 21:17:36,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:36,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:17:36,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:36,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:17:36,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:36,968 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:36,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518833521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:36,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:36,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 21:17:36,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177836763] [2021-06-05 21:17:36,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:17:36,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:36,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:17:36,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:17:36,969 INFO L87 Difference]: Start difference. First operand 411 states and 1107 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:37,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:37,091 INFO L93 Difference]: Finished difference Result 574 states and 1445 transitions. [2021-06-05 21:17:37,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:17:37,091 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:17:37,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:37,093 INFO L225 Difference]: With dead ends: 574 [2021-06-05 21:17:37,093 INFO L226 Difference]: Without dead ends: 566 [2021-06-05 21:17:37,093 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 107.6ms TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:17:37,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-06-05 21:17:37,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 420. [2021-06-05 21:17:37,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 2.6801909307875893) internal successors, (1123), 419 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:37,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1123 transitions. [2021-06-05 21:17:37,100 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1123 transitions. Word has length 17 [2021-06-05 21:17:37,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:37,100 INFO L482 AbstractCegarLoop]: Abstraction has 420 states and 1123 transitions. [2021-06-05 21:17:37,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:37,101 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1123 transitions. [2021-06-05 21:17:37,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:17:37,101 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:37,101 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:37,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-05 21:17:37,317 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:37,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:37,317 INFO L82 PathProgramCache]: Analyzing trace with hash -416986994, now seen corresponding path program 70 times [2021-06-05 21:17:37,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:37,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001691146] [2021-06-05 21:17:37,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:37,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:37,365 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:37,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:37,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001691146] [2021-06-05 21:17:37,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001691146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:37,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769092550] [2021-06-05 21:17:37,366 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:37,387 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:17:37,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:37,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:17:37,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:37,424 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:37,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769092550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:37,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:37,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-05 21:17:37,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523681342] [2021-06-05 21:17:37,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:17:37,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:37,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:17:37,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:17:37,425 INFO L87 Difference]: Start difference. First operand 420 states and 1123 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:37,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:37,518 INFO L93 Difference]: Finished difference Result 565 states and 1384 transitions. [2021-06-05 21:17:37,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:17:37,518 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:17:37,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:37,519 INFO L225 Difference]: With dead ends: 565 [2021-06-05 21:17:37,519 INFO L226 Difference]: Without dead ends: 565 [2021-06-05 21:17:37,519 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 77.1ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:17:37,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-06-05 21:17:37,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 444. [2021-06-05 21:17:37,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 2.724604966139955) internal successors, (1207), 443 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:37,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 1207 transitions. [2021-06-05 21:17:37,524 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 1207 transitions. Word has length 17 [2021-06-05 21:17:37,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:37,524 INFO L482 AbstractCegarLoop]: Abstraction has 444 states and 1207 transitions. [2021-06-05 21:17:37,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:37,524 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 1207 transitions. [2021-06-05 21:17:37,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:17:37,525 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:37,525 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:37,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:37,725 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:37,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:37,726 INFO L82 PathProgramCache]: Analyzing trace with hash -302988914, now seen corresponding path program 71 times [2021-06-05 21:17:37,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:37,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37307] [2021-06-05 21:17:37,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:37,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:37,781 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:37,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:37,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37307] [2021-06-05 21:17:37,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:37,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527973129] [2021-06-05 21:17:37,782 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:37,803 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:17:37,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:37,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:17:37,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:37,844 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:37,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527973129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:37,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:37,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 21:17:37,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226710609] [2021-06-05 21:17:37,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:17:37,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:37,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:17:37,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:17:37,849 INFO L87 Difference]: Start difference. First operand 444 states and 1207 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:37,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:37,991 INFO L93 Difference]: Finished difference Result 566 states and 1444 transitions. [2021-06-05 21:17:37,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:17:37,991 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:17:37,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:37,993 INFO L225 Difference]: With dead ends: 566 [2021-06-05 21:17:37,993 INFO L226 Difference]: Without dead ends: 558 [2021-06-05 21:17:37,993 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 120.2ms TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:17:37,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-06-05 21:17:37,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 444. [2021-06-05 21:17:37,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 2.7200902934537248) internal successors, (1205), 443 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:37,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 1205 transitions. [2021-06-05 21:17:37,999 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 1205 transitions. Word has length 17 [2021-06-05 21:17:37,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:38,000 INFO L482 AbstractCegarLoop]: Abstraction has 444 states and 1205 transitions. [2021-06-05 21:17:38,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:38,000 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 1205 transitions. [2021-06-05 21:17:38,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:17:38,000 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:38,001 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:38,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:38,217 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:38,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:38,217 INFO L82 PathProgramCache]: Analyzing trace with hash 2053009298, now seen corresponding path program 72 times [2021-06-05 21:17:38,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:38,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152385447] [2021-06-05 21:17:38,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:38,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:38,265 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:38,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:38,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152385447] [2021-06-05 21:17:38,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152385447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:38,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491433883] [2021-06-05 21:17:38,265 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:38,292 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:17:38,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:38,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:17:38,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:38,331 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:38,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491433883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:38,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:38,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 12 [2021-06-05 21:17:38,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494673785] [2021-06-05 21:17:38,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:17:38,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:38,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:17:38,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:17:38,332 INFO L87 Difference]: Start difference. First operand 444 states and 1205 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:38,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:38,391 INFO L93 Difference]: Finished difference Result 642 states and 1598 transitions. [2021-06-05 21:17:38,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:17:38,391 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:17:38,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:38,392 INFO L225 Difference]: With dead ends: 642 [2021-06-05 21:17:38,392 INFO L226 Difference]: Without dead ends: 642 [2021-06-05 21:17:38,392 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 60.6ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:17:38,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-06-05 21:17:38,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 497. [2021-06-05 21:17:38,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 2.788306451612903) internal successors, (1383), 496 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:38,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1383 transitions. [2021-06-05 21:17:38,398 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1383 transitions. Word has length 17 [2021-06-05 21:17:38,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:38,398 INFO L482 AbstractCegarLoop]: Abstraction has 497 states and 1383 transitions. [2021-06-05 21:17:38,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:38,398 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1383 transitions. [2021-06-05 21:17:38,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:17:38,399 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:38,399 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:38,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:38,605 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:38,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:38,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1214110000, now seen corresponding path program 73 times [2021-06-05 21:17:38,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:38,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623765817] [2021-06-05 21:17:38,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:38,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:38,671 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:38,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:38,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623765817] [2021-06-05 21:17:38,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623765817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:38,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944559139] [2021-06-05 21:17:38,671 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:38,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:38,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:17:38,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:38,736 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:17:38,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944559139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:38,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:38,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 11 [2021-06-05 21:17:38,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74151659] [2021-06-05 21:17:38,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:17:38,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:38,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:17:38,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:17:38,737 INFO L87 Difference]: Start difference. First operand 497 states and 1383 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:38,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:38,835 INFO L93 Difference]: Finished difference Result 618 states and 1566 transitions. [2021-06-05 21:17:38,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:17:38,836 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:17:38,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:38,837 INFO L225 Difference]: With dead ends: 618 [2021-06-05 21:17:38,837 INFO L226 Difference]: Without dead ends: 616 [2021-06-05 21:17:38,837 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 97.6ms TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:17:38,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-06-05 21:17:38,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 497. [2021-06-05 21:17:38,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 2.784274193548387) internal successors, (1381), 496 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:38,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1381 transitions. [2021-06-05 21:17:38,845 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1381 transitions. Word has length 17 [2021-06-05 21:17:38,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:38,845 INFO L482 AbstractCegarLoop]: Abstraction has 497 states and 1381 transitions. [2021-06-05 21:17:38,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:38,845 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1381 transitions. [2021-06-05 21:17:38,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:17:38,846 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:38,846 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:39,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-05 21:17:39,069 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:39,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:39,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1591452300, now seen corresponding path program 74 times [2021-06-05 21:17:39,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:39,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505311618] [2021-06-05 21:17:39,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:39,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:39,117 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:39,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:39,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505311618] [2021-06-05 21:17:39,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505311618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:39,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94396926] [2021-06-05 21:17:39,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:39,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:17:39,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:39,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:17:39,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:39,175 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:39,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94396926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:39,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:39,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 12 [2021-06-05 21:17:39,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163688302] [2021-06-05 21:17:39,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:17:39,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:39,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:17:39,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:17:39,176 INFO L87 Difference]: Start difference. First operand 497 states and 1381 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:39,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:39,271 INFO L93 Difference]: Finished difference Result 624 states and 1572 transitions. [2021-06-05 21:17:39,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:17:39,271 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:17:39,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:39,272 INFO L225 Difference]: With dead ends: 624 [2021-06-05 21:17:39,272 INFO L226 Difference]: Without dead ends: 620 [2021-06-05 21:17:39,272 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 87.8ms TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:17:39,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2021-06-05 21:17:39,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 502. [2021-06-05 21:17:39,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 2.7864271457085827) internal successors, (1396), 501 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:39,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1396 transitions. [2021-06-05 21:17:39,279 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1396 transitions. Word has length 17 [2021-06-05 21:17:39,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:39,280 INFO L482 AbstractCegarLoop]: Abstraction has 502 states and 1396 transitions. [2021-06-05 21:17:39,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:39,280 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1396 transitions. [2021-06-05 21:17:39,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:17:39,281 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:39,281 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:39,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:39,497 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:39,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:39,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1630429616, now seen corresponding path program 75 times [2021-06-05 21:17:39,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:39,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615215184] [2021-06-05 21:17:39,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:39,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:39,548 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:39,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:39,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615215184] [2021-06-05 21:17:39,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615215184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:39,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095144489] [2021-06-05 21:17:39,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:39,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:17:39,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:39,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:17:39,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:39,624 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:39,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095144489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:39,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:39,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-06-05 21:17:39,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869914998] [2021-06-05 21:17:39,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:17:39,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:39,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:17:39,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:17:39,625 INFO L87 Difference]: Start difference. First operand 502 states and 1396 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:39,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:39,731 INFO L93 Difference]: Finished difference Result 723 states and 1870 transitions. [2021-06-05 21:17:39,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:17:39,731 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:17:39,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:39,733 INFO L225 Difference]: With dead ends: 723 [2021-06-05 21:17:39,733 INFO L226 Difference]: Without dead ends: 717 [2021-06-05 21:17:39,733 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 97.1ms TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:17:39,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-06-05 21:17:39,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 502. [2021-06-05 21:17:39,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 2.7824351297405188) internal successors, (1394), 501 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:39,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1394 transitions. [2021-06-05 21:17:39,739 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1394 transitions. Word has length 17 [2021-06-05 21:17:39,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:39,739 INFO L482 AbstractCegarLoop]: Abstraction has 502 states and 1394 transitions. [2021-06-05 21:17:39,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:39,739 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1394 transitions. [2021-06-05 21:17:39,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:17:39,740 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:39,740 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:39,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-05 21:17:39,940 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:39,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:39,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1570446092, now seen corresponding path program 76 times [2021-06-05 21:17:39,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:39,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412468603] [2021-06-05 21:17:39,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:39,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:40,003 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:40,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:40,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412468603] [2021-06-05 21:17:40,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412468603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:40,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986549835] [2021-06-05 21:17:40,004 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:40,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:17:40,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:40,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:17:40,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:40,085 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:40,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986549835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:40,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:40,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 21:17:40,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142139197] [2021-06-05 21:17:40,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:17:40,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:40,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:17:40,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:17:40,087 INFO L87 Difference]: Start difference. First operand 502 states and 1394 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:40,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:40,221 INFO L93 Difference]: Finished difference Result 736 states and 1882 transitions. [2021-06-05 21:17:40,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:17:40,221 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:17:40,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:40,223 INFO L225 Difference]: With dead ends: 736 [2021-06-05 21:17:40,223 INFO L226 Difference]: Without dead ends: 728 [2021-06-05 21:17:40,223 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 137.1ms TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:17:40,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-06-05 21:17:40,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 506. [2021-06-05 21:17:40,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 2.78019801980198) internal successors, (1404), 505 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:40,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1404 transitions. [2021-06-05 21:17:40,232 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1404 transitions. Word has length 17 [2021-06-05 21:17:40,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:40,232 INFO L482 AbstractCegarLoop]: Abstraction has 506 states and 1404 transitions. [2021-06-05 21:17:40,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:40,232 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1404 transitions. [2021-06-05 21:17:40,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:17:40,233 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:40,233 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:40,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 21:17:40,456 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:40,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:40,457 INFO L82 PathProgramCache]: Analyzing trace with hash -2013345232, now seen corresponding path program 77 times [2021-06-05 21:17:40,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:40,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684197276] [2021-06-05 21:17:40,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:40,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:40,511 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:40,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:40,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684197276] [2021-06-05 21:17:40,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684197276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:40,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34312852] [2021-06-05 21:17:40,512 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:40,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:17:40,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:40,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:17:40,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:40,616 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:40,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34312852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:40,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:40,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 21:17:40,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546687316] [2021-06-05 21:17:40,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:17:40,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:40,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:17:40,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:17:40,618 INFO L87 Difference]: Start difference. First operand 506 states and 1404 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:40,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:40,726 INFO L93 Difference]: Finished difference Result 575 states and 1546 transitions. [2021-06-05 21:17:40,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:17:40,727 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 21:17:40,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:40,727 INFO L225 Difference]: With dead ends: 575 [2021-06-05 21:17:40,727 INFO L226 Difference]: Without dead ends: 570 [2021-06-05 21:17:40,728 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 154.9ms TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:17:40,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-06-05 21:17:40,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 506. [2021-06-05 21:17:40,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 2.778217821782178) internal successors, (1403), 505 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:40,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1403 transitions. [2021-06-05 21:17:40,733 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1403 transitions. Word has length 17 [2021-06-05 21:17:40,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:40,733 INFO L482 AbstractCegarLoop]: Abstraction has 506 states and 1403 transitions. [2021-06-05 21:17:40,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:40,733 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1403 transitions. [2021-06-05 21:17:40,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:17:40,734 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:40,734 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:40,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:40,934 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:40,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:40,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1740678897, now seen corresponding path program 78 times [2021-06-05 21:17:40,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:40,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473990754] [2021-06-05 21:17:40,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:40,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:40,979 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:40,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:40,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473990754] [2021-06-05 21:17:40,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473990754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:40,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178766987] [2021-06-05 21:17:40,979 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:41,001 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:17:41,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:41,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:17:41,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:41,171 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:17:41,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:17:41,317 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:17:41,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:17:41,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:17:41,318 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 21:17:41,324 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:41,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178766987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:41,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:41,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-06-05 21:17:41,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781673896] [2021-06-05 21:17:41,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:17:41,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:41,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:17:41,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:17:41,325 INFO L87 Difference]: Start difference. First operand 506 states and 1403 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:41,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:41,462 INFO L93 Difference]: Finished difference Result 610 states and 1596 transitions. [2021-06-05 21:17:41,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:17:41,462 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:17:41,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:41,464 INFO L225 Difference]: With dead ends: 610 [2021-06-05 21:17:41,464 INFO L226 Difference]: Without dead ends: 607 [2021-06-05 21:17:41,464 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 127.3ms TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:17:41,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-06-05 21:17:41,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 535. [2021-06-05 21:17:41,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 534 states have (on average 2.792134831460674) internal successors, (1491), 534 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:41,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 1491 transitions. [2021-06-05 21:17:41,472 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 1491 transitions. Word has length 18 [2021-06-05 21:17:41,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:41,472 INFO L482 AbstractCegarLoop]: Abstraction has 535 states and 1491 transitions. [2021-06-05 21:17:41,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:41,472 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 1491 transitions. [2021-06-05 21:17:41,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:17:41,473 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:41,473 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:41,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:41,693 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:41,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:41,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1612382321, now seen corresponding path program 79 times [2021-06-05 21:17:41,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:41,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734174157] [2021-06-05 21:17:41,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:41,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:41,743 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:41,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:41,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734174157] [2021-06-05 21:17:41,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734174157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:41,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35642423] [2021-06-05 21:17:41,744 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:41,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:41,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:17:41,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:41,957 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:17:41,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:17:42,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:17:42,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:17:42,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:17:42,204 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 21:17:42,211 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:42,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35642423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:42,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:42,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-06-05 21:17:42,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911931269] [2021-06-05 21:17:42,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:17:42,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:42,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:17:42,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:17:42,212 INFO L87 Difference]: Start difference. First operand 535 states and 1491 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:42,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:42,338 INFO L93 Difference]: Finished difference Result 674 states and 1772 transitions. [2021-06-05 21:17:42,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:17:42,338 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:17:42,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:42,340 INFO L225 Difference]: With dead ends: 674 [2021-06-05 21:17:42,340 INFO L226 Difference]: Without dead ends: 671 [2021-06-05 21:17:42,340 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 135.8ms TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:17:42,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-06-05 21:17:42,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 575. [2021-06-05 21:17:42,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 2.836236933797909) internal successors, (1628), 574 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:42,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1628 transitions. [2021-06-05 21:17:42,363 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1628 transitions. Word has length 18 [2021-06-05 21:17:42,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:42,363 INFO L482 AbstractCegarLoop]: Abstraction has 575 states and 1628 transitions. [2021-06-05 21:17:42,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:42,363 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1628 transitions. [2021-06-05 21:17:42,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:17:42,364 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:42,364 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:42,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:42,587 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:42,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:42,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1250571143, now seen corresponding path program 80 times [2021-06-05 21:17:42,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:42,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895691093] [2021-06-05 21:17:42,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:42,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:42,624 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:17:42,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:42,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895691093] [2021-06-05 21:17:42,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895691093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:42,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95383876] [2021-06-05 21:17:42,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:42,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:17:42,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:42,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:17:42,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:42,804 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:17:42,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:17:43,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:17:43,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:17:43,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:17:43,223 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 21:17:43,230 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:43,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95383876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:43,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:43,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-06-05 21:17:43,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815013221] [2021-06-05 21:17:43,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:17:43,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:43,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:17:43,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:17:43,231 INFO L87 Difference]: Start difference. First operand 575 states and 1628 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:43,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:43,333 INFO L93 Difference]: Finished difference Result 731 states and 1949 transitions. [2021-06-05 21:17:43,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:17:43,333 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:17:43,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:43,338 INFO L225 Difference]: With dead ends: 731 [2021-06-05 21:17:43,338 INFO L226 Difference]: Without dead ends: 728 [2021-06-05 21:17:43,338 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 116.4ms TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:17:43,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-06-05 21:17:43,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 616. [2021-06-05 21:17:43,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 615 states have (on average 2.8894308943089433) internal successors, (1777), 615 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:43,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 1777 transitions. [2021-06-05 21:17:43,348 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 1777 transitions. Word has length 18 [2021-06-05 21:17:43,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:43,348 INFO L482 AbstractCegarLoop]: Abstraction has 616 states and 1777 transitions. [2021-06-05 21:17:43,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:43,348 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 1777 transitions. [2021-06-05 21:17:43,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:17:43,349 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:43,349 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:43,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-05 21:17:43,571 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:43,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:43,571 INFO L82 PathProgramCache]: Analyzing trace with hash -192184689, now seen corresponding path program 81 times [2021-06-05 21:17:43,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:43,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788588120] [2021-06-05 21:17:43,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:43,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:43,612 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:43,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:43,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788588120] [2021-06-05 21:17:43,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788588120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:43,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771024491] [2021-06-05 21:17:43,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:43,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:17:43,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:43,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:17:43,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:43,810 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:17:43,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:17:44,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:17:44,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:17:44,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:17:44,117 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 21:17:44,124 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:44,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771024491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:44,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:44,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-06-05 21:17:44,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521202973] [2021-06-05 21:17:44,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:17:44,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:44,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:17:44,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:17:44,125 INFO L87 Difference]: Start difference. First operand 616 states and 1777 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:44,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:44,299 INFO L93 Difference]: Finished difference Result 778 states and 2109 transitions. [2021-06-05 21:17:44,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:17:44,300 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:17:44,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:44,301 INFO L225 Difference]: With dead ends: 778 [2021-06-05 21:17:44,301 INFO L226 Difference]: Without dead ends: 775 [2021-06-05 21:17:44,302 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 119.3ms TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:17:44,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2021-06-05 21:17:44,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 659. [2021-06-05 21:17:44,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 658 states have (on average 2.9376899696048633) internal successors, (1933), 658 states have internal predecessors, (1933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:44,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 1933 transitions. [2021-06-05 21:17:44,313 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 1933 transitions. Word has length 18 [2021-06-05 21:17:44,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:44,313 INFO L482 AbstractCegarLoop]: Abstraction has 659 states and 1933 transitions. [2021-06-05 21:17:44,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:44,314 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 1933 transitions. [2021-06-05 21:17:44,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:17:44,315 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:44,315 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:44,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2021-06-05 21:17:44,539 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:44,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:44,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1967942521, now seen corresponding path program 82 times [2021-06-05 21:17:44,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:44,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068854233] [2021-06-05 21:17:44,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:44,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:44,576 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:17:44,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:44,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068854233] [2021-06-05 21:17:44,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068854233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:44,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715857654] [2021-06-05 21:17:44,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:44,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:17:44,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:44,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:17:44,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:44,755 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:17:44,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:17:44,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:17:44,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:17:44,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:17:44,883 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 21:17:44,890 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:44,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715857654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:44,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:44,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-06-05 21:17:44,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132077636] [2021-06-05 21:17:44,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:17:44,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:44,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:17:44,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:17:44,891 INFO L87 Difference]: Start difference. First operand 659 states and 1933 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:45,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:45,042 INFO L93 Difference]: Finished difference Result 823 states and 2281 transitions. [2021-06-05 21:17:45,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:17:45,042 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:17:45,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:45,044 INFO L225 Difference]: With dead ends: 823 [2021-06-05 21:17:45,044 INFO L226 Difference]: Without dead ends: 820 [2021-06-05 21:17:45,044 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 119.3ms TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:17:45,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2021-06-05 21:17:45,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 714. [2021-06-05 21:17:45,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 713 states have (on average 2.985974754558205) internal successors, (2129), 713 states have internal predecessors, (2129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:45,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 2129 transitions. [2021-06-05 21:17:45,057 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 2129 transitions. Word has length 18 [2021-06-05 21:17:45,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:45,058 INFO L482 AbstractCegarLoop]: Abstraction has 714 states and 2129 transitions. [2021-06-05 21:17:45,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:45,058 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 2129 transitions. [2021-06-05 21:17:45,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:17:45,059 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:45,059 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:45,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:45,281 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:45,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:45,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1181860465, now seen corresponding path program 83 times [2021-06-05 21:17:45,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:45,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185425092] [2021-06-05 21:17:45,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:45,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:45,323 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:45,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:45,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185425092] [2021-06-05 21:17:45,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185425092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:45,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424174997] [2021-06-05 21:17:45,325 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:45,362 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:17:45,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:45,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:17:45,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:45,545 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:17:45,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:17:45,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:17:45,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:17:45,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:17:45,719 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 21:17:45,726 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:45,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424174997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:45,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:45,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-06-05 21:17:45,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885792498] [2021-06-05 21:17:45,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:17:45,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:45,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:17:45,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:17:45,728 INFO L87 Difference]: Start difference. First operand 714 states and 2129 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:45,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:45,944 INFO L93 Difference]: Finished difference Result 908 states and 2540 transitions. [2021-06-05 21:17:45,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:17:45,944 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:17:45,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:45,947 INFO L225 Difference]: With dead ends: 908 [2021-06-05 21:17:45,947 INFO L226 Difference]: Without dead ends: 905 [2021-06-05 21:17:45,947 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 137.1ms TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:17:45,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2021-06-05 21:17:45,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 800. [2021-06-05 21:17:45,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 3.0) internal successors, (2397), 799 states have internal predecessors, (2397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:45,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2397 transitions. [2021-06-05 21:17:45,960 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2397 transitions. Word has length 18 [2021-06-05 21:17:45,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:45,960 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 2397 transitions. [2021-06-05 21:17:45,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:45,960 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2397 transitions. [2021-06-05 21:17:45,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 21:17:45,962 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:45,962 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:46,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-06-05 21:17:46,177 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:46,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:46,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1711846791, now seen corresponding path program 84 times [2021-06-05 21:17:46,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:46,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216870149] [2021-06-05 21:17:46,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:46,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:46,222 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:46,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:46,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216870149] [2021-06-05 21:17:46,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216870149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:46,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347996505] [2021-06-05 21:17:46,222 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:46,265 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:17:46,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:46,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:17:46,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:46,455 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:17:46,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 21:17:46,642 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:17:46,644 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:17:46,644 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:17:46,644 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 21:17:46,651 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:46,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347996505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:46,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:46,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-06-05 21:17:46,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124526900] [2021-06-05 21:17:46,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:17:46,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:46,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:17:46,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:17:46,653 INFO L87 Difference]: Start difference. First operand 800 states and 2397 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:46,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:46,803 INFO L93 Difference]: Finished difference Result 974 states and 2756 transitions. [2021-06-05 21:17:46,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:17:46,803 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 21:17:46,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:46,804 INFO L225 Difference]: With dead ends: 974 [2021-06-05 21:17:46,805 INFO L226 Difference]: Without dead ends: 971 [2021-06-05 21:17:46,805 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 141.4ms TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:17:46,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2021-06-05 21:17:46,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 872. [2021-06-05 21:17:46,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 3.0114810562571757) internal successors, (2623), 871 states have internal predecessors, (2623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:46,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2623 transitions. [2021-06-05 21:17:46,815 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2623 transitions. Word has length 18 [2021-06-05 21:17:46,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:46,815 INFO L482 AbstractCegarLoop]: Abstraction has 872 states and 2623 transitions. [2021-06-05 21:17:46,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:46,815 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2623 transitions. [2021-06-05 21:17:46,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:17:46,816 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:46,816 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:47,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:47,017 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:47,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:47,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1937782575, now seen corresponding path program 85 times [2021-06-05 21:17:47,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:47,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351079101] [2021-06-05 21:17:47,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:47,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:47,089 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:47,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:47,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351079101] [2021-06-05 21:17:47,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351079101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:47,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15389486] [2021-06-05 21:17:47,090 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:47,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:47,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:17:47,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:47,156 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:47,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15389486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:47,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:47,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:17:47,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927327406] [2021-06-05 21:17:47,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:17:47,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:47,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:17:47,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:17:47,157 INFO L87 Difference]: Start difference. First operand 872 states and 2623 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:47,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:47,292 INFO L93 Difference]: Finished difference Result 993 states and 2794 transitions. [2021-06-05 21:17:47,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:17:47,301 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:17:47,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:47,303 INFO L225 Difference]: With dead ends: 993 [2021-06-05 21:17:47,303 INFO L226 Difference]: Without dead ends: 993 [2021-06-05 21:17:47,303 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 135.7ms TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:17:47,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2021-06-05 21:17:47,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 868. [2021-06-05 21:17:47,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 3.0069204152249136) internal successors, (2607), 867 states have internal predecessors, (2607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:47,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 2607 transitions. [2021-06-05 21:17:47,317 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 2607 transitions. Word has length 19 [2021-06-05 21:17:47,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:47,318 INFO L482 AbstractCegarLoop]: Abstraction has 868 states and 2607 transitions. [2021-06-05 21:17:47,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:47,318 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 2607 transitions. [2021-06-05 21:17:47,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:17:47,319 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:47,319 INFO L554 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:47,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable527 [2021-06-05 21:17:47,533 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:47,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:47,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1896600742, now seen corresponding path program 86 times [2021-06-05 21:17:47,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:47,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899703582] [2021-06-05 21:17:47,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:47,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:47,592 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:47,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:47,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899703582] [2021-06-05 21:17:47,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899703582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:47,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552399417] [2021-06-05 21:17:47,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:47,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:17:47,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:47,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:17:47,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:47,648 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:47,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552399417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:47,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:47,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:17:47,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411976073] [2021-06-05 21:17:47,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:17:47,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:47,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:17:47,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:17:47,649 INFO L87 Difference]: Start difference. First operand 868 states and 2607 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:47,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:47,841 INFO L93 Difference]: Finished difference Result 1076 states and 2933 transitions. [2021-06-05 21:17:47,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:17:47,841 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:17:47,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:47,842 INFO L225 Difference]: With dead ends: 1076 [2021-06-05 21:17:47,843 INFO L226 Difference]: Without dead ends: 1067 [2021-06-05 21:17:47,843 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 156.8ms TimeCoverageRelationStatistics Valid=237, Invalid=465, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:17:47,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-06-05 21:17:47,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 886. [2021-06-05 21:17:47,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 2.994350282485876) internal successors, (2650), 885 states have internal predecessors, (2650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:47,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 2650 transitions. [2021-06-05 21:17:47,855 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 2650 transitions. Word has length 19 [2021-06-05 21:17:47,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:47,855 INFO L482 AbstractCegarLoop]: Abstraction has 886 states and 2650 transitions. [2021-06-05 21:17:47,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:47,855 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 2650 transitions. [2021-06-05 21:17:47,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:17:47,857 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:47,857 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:48,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable528 [2021-06-05 21:17:48,070 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:48,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:48,071 INFO L82 PathProgramCache]: Analyzing trace with hash -483433455, now seen corresponding path program 87 times [2021-06-05 21:17:48,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:48,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70107666] [2021-06-05 21:17:48,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:48,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:48,120 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:48,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:48,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70107666] [2021-06-05 21:17:48,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70107666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:48,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259238822] [2021-06-05 21:17:48,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:48,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:17:48,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:48,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:17:48,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:48,183 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:48,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259238822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:48,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:48,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:17:48,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771422747] [2021-06-05 21:17:48,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:17:48,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:48,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:17:48,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:17:48,184 INFO L87 Difference]: Start difference. First operand 886 states and 2650 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:48,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:48,299 INFO L93 Difference]: Finished difference Result 917 states and 2693 transitions. [2021-06-05 21:17:48,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:17:48,300 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:17:48,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:48,301 INFO L225 Difference]: With dead ends: 917 [2021-06-05 21:17:48,301 INFO L226 Difference]: Without dead ends: 916 [2021-06-05 21:17:48,301 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 84.3ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:17:48,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2021-06-05 21:17:48,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 886. [2021-06-05 21:17:48,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 2.992090395480226) internal successors, (2648), 885 states have internal predecessors, (2648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:48,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 2648 transitions. [2021-06-05 21:17:48,314 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 2648 transitions. Word has length 19 [2021-06-05 21:17:48,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:48,314 INFO L482 AbstractCegarLoop]: Abstraction has 886 states and 2648 transitions. [2021-06-05 21:17:48,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:48,314 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 2648 transitions. [2021-06-05 21:17:48,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:17:48,316 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:48,316 INFO L554 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:48,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable529,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:48,533 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:48,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:48,533 INFO L82 PathProgramCache]: Analyzing trace with hash 433622898, now seen corresponding path program 88 times [2021-06-05 21:17:48,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:48,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519033630] [2021-06-05 21:17:48,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:48,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:48,584 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:48,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:48,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519033630] [2021-06-05 21:17:48,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519033630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:48,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771095367] [2021-06-05 21:17:48,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:48,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:17:48,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:48,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:17:48,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:48,651 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:48,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771095367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:48,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:48,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:17:48,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210648030] [2021-06-05 21:17:48,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:17:48,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:48,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:17:48,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:17:48,652 INFO L87 Difference]: Start difference. First operand 886 states and 2648 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:48,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:48,698 INFO L93 Difference]: Finished difference Result 1091 states and 2973 transitions. [2021-06-05 21:17:48,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:17:48,698 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:17:48,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:48,699 INFO L225 Difference]: With dead ends: 1091 [2021-06-05 21:17:48,699 INFO L226 Difference]: Without dead ends: 1091 [2021-06-05 21:17:48,700 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 47.8ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:17:48,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1091 states. [2021-06-05 21:17:48,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1091 to 869. [2021-06-05 21:17:48,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 2.975806451612903) internal successors, (2583), 868 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:48,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2583 transitions. [2021-06-05 21:17:48,710 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2583 transitions. Word has length 19 [2021-06-05 21:17:48,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:48,710 INFO L482 AbstractCegarLoop]: Abstraction has 869 states and 2583 transitions. [2021-06-05 21:17:48,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:48,710 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2583 transitions. [2021-06-05 21:17:48,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:17:48,712 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:48,712 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:48,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable530,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:48,916 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:48,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:48,916 INFO L82 PathProgramCache]: Analyzing trace with hash 634065319, now seen corresponding path program 89 times [2021-06-05 21:17:48,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:48,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000428902] [2021-06-05 21:17:48,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:48,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:48,962 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:48,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:48,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000428902] [2021-06-05 21:17:48,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000428902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:48,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354073093] [2021-06-05 21:17:48,963 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:48,986 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:17:48,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:48,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:17:48,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:49,020 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:49,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354073093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:49,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:49,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:17:49,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667738804] [2021-06-05 21:17:49,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:17:49,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:49,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:17:49,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:17:49,021 INFO L87 Difference]: Start difference. First operand 869 states and 2583 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:49,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:49,107 INFO L93 Difference]: Finished difference Result 1088 states and 2969 transitions. [2021-06-05 21:17:49,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:17:49,107 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:17:49,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:49,108 INFO L225 Difference]: With dead ends: 1088 [2021-06-05 21:17:49,109 INFO L226 Difference]: Without dead ends: 1088 [2021-06-05 21:17:49,109 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 66.7ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:17:49,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2021-06-05 21:17:49,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 899. [2021-06-05 21:17:49,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 2.9844097995545655) internal successors, (2680), 898 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:49,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2680 transitions. [2021-06-05 21:17:49,120 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2680 transitions. Word has length 19 [2021-06-05 21:17:49,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:49,120 INFO L482 AbstractCegarLoop]: Abstraction has 899 states and 2680 transitions. [2021-06-05 21:17:49,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:49,120 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2680 transitions. [2021-06-05 21:17:49,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:17:49,122 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:49,122 INFO L554 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:49,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable531 [2021-06-05 21:17:49,337 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:49,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:49,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1578827302, now seen corresponding path program 90 times [2021-06-05 21:17:49,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:49,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076836557] [2021-06-05 21:17:49,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:49,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:49,385 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:49,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:49,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076836557] [2021-06-05 21:17:49,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076836557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:49,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258437277] [2021-06-05 21:17:49,385 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:49,416 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:17:49,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:49,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:17:49,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:49,449 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:49,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258437277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:49,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:49,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:17:49,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004798575] [2021-06-05 21:17:49,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:17:49,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:49,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:17:49,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:17:49,449 INFO L87 Difference]: Start difference. First operand 899 states and 2680 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:49,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:49,553 INFO L93 Difference]: Finished difference Result 1083 states and 2957 transitions. [2021-06-05 21:17:49,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:17:49,554 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:17:49,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:49,555 INFO L225 Difference]: With dead ends: 1083 [2021-06-05 21:17:49,555 INFO L226 Difference]: Without dead ends: 1081 [2021-06-05 21:17:49,555 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 78.2ms TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:17:49,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2021-06-05 21:17:49,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 907. [2021-06-05 21:17:49,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 906 states have (on average 2.987858719646799) internal successors, (2707), 906 states have internal predecessors, (2707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:49,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 2707 transitions. [2021-06-05 21:17:49,570 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 2707 transitions. Word has length 19 [2021-06-05 21:17:49,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:49,571 INFO L482 AbstractCegarLoop]: Abstraction has 907 states and 2707 transitions. [2021-06-05 21:17:49,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:49,571 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 2707 transitions. [2021-06-05 21:17:49,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:17:49,572 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:49,572 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:49,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-06-05 21:17:49,790 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:49,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:49,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1915447287, now seen corresponding path program 91 times [2021-06-05 21:17:49,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:49,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041283956] [2021-06-05 21:17:49,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:49,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:49,840 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:49,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:49,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041283956] [2021-06-05 21:17:49,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041283956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:49,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626598085] [2021-06-05 21:17:49,841 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:49,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:49,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:17:49,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:49,902 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:49,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626598085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:49,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:49,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:17:49,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050110092] [2021-06-05 21:17:49,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:17:49,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:49,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:17:49,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:17:49,904 INFO L87 Difference]: Start difference. First operand 907 states and 2707 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:50,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:50,019 INFO L93 Difference]: Finished difference Result 1039 states and 2898 transitions. [2021-06-05 21:17:50,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:17:50,020 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:17:50,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:50,021 INFO L225 Difference]: With dead ends: 1039 [2021-06-05 21:17:50,021 INFO L226 Difference]: Without dead ends: 1037 [2021-06-05 21:17:50,021 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 77.1ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:17:50,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2021-06-05 21:17:50,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 884. [2021-06-05 21:17:50,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 2.9750849377123445) internal successors, (2627), 883 states have internal predecessors, (2627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:50,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 2627 transitions. [2021-06-05 21:17:50,031 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 2627 transitions. Word has length 19 [2021-06-05 21:17:50,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:50,031 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 2627 transitions. [2021-06-05 21:17:50,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:50,031 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 2627 transitions. [2021-06-05 21:17:50,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:17:50,032 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:50,032 INFO L554 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:50,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable533,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:50,233 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:50,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:50,233 INFO L82 PathProgramCache]: Analyzing trace with hash -998390934, now seen corresponding path program 92 times [2021-06-05 21:17:50,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:50,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547538809] [2021-06-05 21:17:50,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:50,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:50,279 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:50,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:50,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547538809] [2021-06-05 21:17:50,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547538809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:50,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665671310] [2021-06-05 21:17:50,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:50,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:17:50,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:50,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:17:50,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:50,347 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:50,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665671310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:50,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:50,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:17:50,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132700287] [2021-06-05 21:17:50,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:17:50,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:50,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:17:50,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:17:50,348 INFO L87 Difference]: Start difference. First operand 884 states and 2627 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:50,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:50,402 INFO L93 Difference]: Finished difference Result 1108 states and 2970 transitions. [2021-06-05 21:17:50,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:17:50,402 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:17:50,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:50,404 INFO L225 Difference]: With dead ends: 1108 [2021-06-05 21:17:50,404 INFO L226 Difference]: Without dead ends: 1108 [2021-06-05 21:17:50,404 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 45.7ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:17:50,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2021-06-05 21:17:50,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 887. [2021-06-05 21:17:50,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 2.9729119638826185) internal successors, (2634), 886 states have internal predecessors, (2634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:50,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 2634 transitions. [2021-06-05 21:17:50,419 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 2634 transitions. Word has length 19 [2021-06-05 21:17:50,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:50,419 INFO L482 AbstractCegarLoop]: Abstraction has 887 states and 2634 transitions. [2021-06-05 21:17:50,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:50,419 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 2634 transitions. [2021-06-05 21:17:50,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:17:50,420 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:50,421 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:50,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable534 [2021-06-05 21:17:50,641 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:50,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:50,642 INFO L82 PathProgramCache]: Analyzing trace with hash -204833979, now seen corresponding path program 93 times [2021-06-05 21:17:50,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:50,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605973771] [2021-06-05 21:17:50,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:50,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:50,694 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:50,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:50,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605973771] [2021-06-05 21:17:50,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605973771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:50,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701007507] [2021-06-05 21:17:50,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:50,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:17:50,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:50,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 21:17:50,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:50,840 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 21:17:50,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701007507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:50,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:50,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-06-05 21:17:50,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820455919] [2021-06-05 21:17:50,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:17:50,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:50,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:17:50,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:17:50,841 INFO L87 Difference]: Start difference. First operand 887 states and 2634 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:51,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:51,379 INFO L93 Difference]: Finished difference Result 2007 states and 5647 transitions. [2021-06-05 21:17:51,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 21:17:51,379 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:17:51,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:51,382 INFO L225 Difference]: With dead ends: 2007 [2021-06-05 21:17:51,382 INFO L226 Difference]: Without dead ends: 1998 [2021-06-05 21:17:51,382 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 452.4ms TimeCoverageRelationStatistics Valid=356, Invalid=2836, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 21:17:51,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1998 states. [2021-06-05 21:17:51,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1998 to 1397. [2021-06-05 21:17:51,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1397 states, 1396 states have (on average 2.930515759312321) internal successors, (4091), 1396 states have internal predecessors, (4091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:51,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 4091 transitions. [2021-06-05 21:17:51,406 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 4091 transitions. Word has length 19 [2021-06-05 21:17:51,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:51,406 INFO L482 AbstractCegarLoop]: Abstraction has 1397 states and 4091 transitions. [2021-06-05 21:17:51,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:51,406 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 4091 transitions. [2021-06-05 21:17:51,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:17:51,407 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:51,407 INFO L554 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:51,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable535,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:51,608 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:51,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:51,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1567529028, now seen corresponding path program 94 times [2021-06-05 21:17:51,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:51,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296360031] [2021-06-05 21:17:51,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:51,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:51,659 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:51,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:51,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296360031] [2021-06-05 21:17:51,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296360031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:51,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835498041] [2021-06-05 21:17:51,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:51,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:17:51,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:51,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:17:51,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:51,750 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:51,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835498041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:51,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:51,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 21:17:51,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778971721] [2021-06-05 21:17:51,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:17:51,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:51,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:17:51,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:17:51,751 INFO L87 Difference]: Start difference. First operand 1397 states and 4091 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:51,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:51,832 INFO L93 Difference]: Finished difference Result 1816 states and 4866 transitions. [2021-06-05 21:17:51,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:17:51,832 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:17:51,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:51,834 INFO L225 Difference]: With dead ends: 1816 [2021-06-05 21:17:51,834 INFO L226 Difference]: Without dead ends: 1816 [2021-06-05 21:17:51,834 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 69.3ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:17:51,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1816 states. [2021-06-05 21:17:51,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1816 to 1363. [2021-06-05 21:17:51,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1362 states have (on average 2.9140969162995596) internal successors, (3969), 1362 states have internal predecessors, (3969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:51,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 3969 transitions. [2021-06-05 21:17:51,857 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 3969 transitions. Word has length 19 [2021-06-05 21:17:51,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:51,858 INFO L482 AbstractCegarLoop]: Abstraction has 1363 states and 3969 transitions. [2021-06-05 21:17:51,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:51,858 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 3969 transitions. [2021-06-05 21:17:51,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:17:51,860 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:51,860 INFO L554 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:52,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable536 [2021-06-05 21:17:52,073 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:52,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:52,073 INFO L82 PathProgramCache]: Analyzing trace with hash 136071470, now seen corresponding path program 95 times [2021-06-05 21:17:52,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:52,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283579276] [2021-06-05 21:17:52,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:52,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:52,116 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:52,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:52,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283579276] [2021-06-05 21:17:52,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283579276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:52,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079049844] [2021-06-05 21:17:52,117 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:52,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:17:52,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:52,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:17:52,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:52,168 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:52,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079049844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:52,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:52,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:17:52,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142585402] [2021-06-05 21:17:52,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:17:52,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:52,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:17:52,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:17:52,169 INFO L87 Difference]: Start difference. First operand 1363 states and 3969 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:52,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:52,267 INFO L93 Difference]: Finished difference Result 1590 states and 4309 transitions. [2021-06-05 21:17:52,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:17:52,267 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:17:52,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:52,269 INFO L225 Difference]: With dead ends: 1590 [2021-06-05 21:17:52,269 INFO L226 Difference]: Without dead ends: 1588 [2021-06-05 21:17:52,272 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 73.1ms TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:17:52,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1588 states. [2021-06-05 21:17:52,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1588 to 1376. [2021-06-05 21:17:52,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1376 states, 1375 states have (on average 2.9134545454545453) internal successors, (4006), 1375 states have internal predecessors, (4006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:52,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1376 states to 1376 states and 4006 transitions. [2021-06-05 21:17:52,296 INFO L78 Accepts]: Start accepts. Automaton has 1376 states and 4006 transitions. Word has length 19 [2021-06-05 21:17:52,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:52,296 INFO L482 AbstractCegarLoop]: Abstraction has 1376 states and 4006 transitions. [2021-06-05 21:17:52,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:52,296 INFO L276 IsEmpty]: Start isEmpty. Operand 1376 states and 4006 transitions. [2021-06-05 21:17:52,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:17:52,299 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:52,299 INFO L554 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:52,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable537 [2021-06-05 21:17:52,513 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:52,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:52,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1853820530, now seen corresponding path program 96 times [2021-06-05 21:17:52,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:52,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426940444] [2021-06-05 21:17:52,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:52,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:52,557 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:52,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:52,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426940444] [2021-06-05 21:17:52,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426940444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:52,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10713092] [2021-06-05 21:17:52,557 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:52,582 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:17:52,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:52,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:17:52,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:52,614 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 17 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:52,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10713092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:52,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:52,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:17:52,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307721333] [2021-06-05 21:17:52,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:17:52,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:52,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:17:52,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:17:52,615 INFO L87 Difference]: Start difference. First operand 1376 states and 4006 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:52,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:52,662 INFO L93 Difference]: Finished difference Result 1582 states and 4263 transitions. [2021-06-05 21:17:52,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:17:52,662 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:17:52,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:52,664 INFO L225 Difference]: With dead ends: 1582 [2021-06-05 21:17:52,664 INFO L226 Difference]: Without dead ends: 1582 [2021-06-05 21:17:52,664 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 41.7ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:17:52,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2021-06-05 21:17:52,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1360. [2021-06-05 21:17:52,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1360 states, 1359 states have (on average 2.9021339220014717) internal successors, (3944), 1359 states have internal predecessors, (3944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:52,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 3944 transitions. [2021-06-05 21:17:52,678 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 3944 transitions. Word has length 19 [2021-06-05 21:17:52,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:52,678 INFO L482 AbstractCegarLoop]: Abstraction has 1360 states and 3944 transitions. [2021-06-05 21:17:52,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:52,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 3944 transitions. [2021-06-05 21:17:52,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:17:52,679 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:52,679 INFO L554 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:52,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable538,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:52,880 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:52,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:52,880 INFO L82 PathProgramCache]: Analyzing trace with hash 124773196, now seen corresponding path program 97 times [2021-06-05 21:17:52,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:52,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385266020] [2021-06-05 21:17:52,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:52,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:52,930 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:52,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:52,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385266020] [2021-06-05 21:17:52,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385266020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:52,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435151158] [2021-06-05 21:17:52,930 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:52,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:52,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:17:52,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:53,016 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:53,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435151158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:53,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:53,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:17:53,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38338684] [2021-06-05 21:17:53,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:17:53,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:53,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:17:53,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:17:53,017 INFO L87 Difference]: Start difference. First operand 1360 states and 3944 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:53,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:53,113 INFO L93 Difference]: Finished difference Result 1713 states and 4555 transitions. [2021-06-05 21:17:53,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:17:53,114 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:17:53,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:53,116 INFO L225 Difference]: With dead ends: 1713 [2021-06-05 21:17:53,116 INFO L226 Difference]: Without dead ends: 1713 [2021-06-05 21:17:53,116 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 60.7ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:17:53,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1713 states. [2021-06-05 21:17:53,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1713 to 1363. [2021-06-05 21:17:53,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1362 states have (on average 2.9023494860499266) internal successors, (3953), 1362 states have internal predecessors, (3953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:53,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 3953 transitions. [2021-06-05 21:17:53,138 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 3953 transitions. Word has length 19 [2021-06-05 21:17:53,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:53,138 INFO L482 AbstractCegarLoop]: Abstraction has 1363 states and 3953 transitions. [2021-06-05 21:17:53,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:53,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 3953 transitions. [2021-06-05 21:17:53,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:17:53,140 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:53,140 INFO L554 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:53,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable539,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:53,363 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:53,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:53,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1936086606, now seen corresponding path program 98 times [2021-06-05 21:17:53,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:53,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564602627] [2021-06-05 21:17:53,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:53,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:53,413 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:53,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:53,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564602627] [2021-06-05 21:17:53,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564602627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:53,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80178334] [2021-06-05 21:17:53,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:53,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:17:53,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:53,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:17:53,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:53,472 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:53,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80178334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:53,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:53,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:17:53,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301417940] [2021-06-05 21:17:53,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:17:53,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:53,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:17:53,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:17:53,473 INFO L87 Difference]: Start difference. First operand 1363 states and 3953 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:53,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:53,554 INFO L93 Difference]: Finished difference Result 2155 states and 5922 transitions. [2021-06-05 21:17:53,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:17:53,554 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:17:53,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:53,556 INFO L225 Difference]: With dead ends: 2155 [2021-06-05 21:17:53,556 INFO L226 Difference]: Without dead ends: 2155 [2021-06-05 21:17:53,556 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 75.6ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:17:53,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2155 states. [2021-06-05 21:17:53,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2155 to 1651. [2021-06-05 21:17:53,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 2.983030303030303) internal successors, (4922), 1650 states have internal predecessors, (4922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:53,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 4922 transitions. [2021-06-05 21:17:53,575 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 4922 transitions. Word has length 19 [2021-06-05 21:17:53,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:53,576 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 4922 transitions. [2021-06-05 21:17:53,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:53,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 4922 transitions. [2021-06-05 21:17:53,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:17:53,577 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:53,577 INFO L554 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:53,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable540 [2021-06-05 21:17:53,778 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:53,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:53,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1320949180, now seen corresponding path program 99 times [2021-06-05 21:17:53,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:53,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977893924] [2021-06-05 21:17:53,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:53,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:53,818 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:17:53,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:53,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977893924] [2021-06-05 21:17:53,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977893924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:53,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244984599] [2021-06-05 21:17:53,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:53,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:17:53,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:53,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:17:53,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:53,881 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:17:53,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244984599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:53,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:53,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 21:17:53,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408401133] [2021-06-05 21:17:53,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:17:53,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:53,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:17:53,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:17:53,882 INFO L87 Difference]: Start difference. First operand 1651 states and 4922 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:54,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:54,001 INFO L93 Difference]: Finished difference Result 1877 states and 5329 transitions. [2021-06-05 21:17:54,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:17:54,001 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:17:54,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:54,004 INFO L225 Difference]: With dead ends: 1877 [2021-06-05 21:17:54,004 INFO L226 Difference]: Without dead ends: 1873 [2021-06-05 21:17:54,004 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 75.9ms TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:17:54,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1873 states. [2021-06-05 21:17:54,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1873 to 1703. [2021-06-05 21:17:54,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1703 states, 1702 states have (on average 2.9958871915393654) internal successors, (5099), 1702 states have internal predecessors, (5099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:54,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1703 states to 1703 states and 5099 transitions. [2021-06-05 21:17:54,031 INFO L78 Accepts]: Start accepts. Automaton has 1703 states and 5099 transitions. Word has length 19 [2021-06-05 21:17:54,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:54,031 INFO L482 AbstractCegarLoop]: Abstraction has 1703 states and 5099 transitions. [2021-06-05 21:17:54,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:54,031 INFO L276 IsEmpty]: Start isEmpty. Operand 1703 states and 5099 transitions. [2021-06-05 21:17:54,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:17:54,033 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:54,034 INFO L554 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:54,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable541 [2021-06-05 21:17:54,246 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:54,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:54,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1089469124, now seen corresponding path program 100 times [2021-06-05 21:17:54,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:54,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938307186] [2021-06-05 21:17:54,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:54,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:54,300 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:54,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:54,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938307186] [2021-06-05 21:17:54,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938307186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:54,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090280248] [2021-06-05 21:17:54,300 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:54,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:17:54,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:54,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:17:54,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:54,364 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:54,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090280248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:54,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:54,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:17:54,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652095808] [2021-06-05 21:17:54,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:17:54,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:54,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:17:54,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:17:54,365 INFO L87 Difference]: Start difference. First operand 1703 states and 5099 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:54,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:54,453 INFO L93 Difference]: Finished difference Result 2270 states and 6309 transitions. [2021-06-05 21:17:54,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:17:54,453 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:17:54,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:54,455 INFO L225 Difference]: With dead ends: 2270 [2021-06-05 21:17:54,456 INFO L226 Difference]: Without dead ends: 2270 [2021-06-05 21:17:54,456 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 82.3ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:17:54,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2270 states. [2021-06-05 21:17:54,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2270 to 1409. [2021-06-05 21:17:54,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1408 states have (on average 2.9396306818181817) internal successors, (4139), 1408 states have internal predecessors, (4139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:54,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 4139 transitions. [2021-06-05 21:17:54,485 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 4139 transitions. Word has length 19 [2021-06-05 21:17:54,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:54,485 INFO L482 AbstractCegarLoop]: Abstraction has 1409 states and 4139 transitions. [2021-06-05 21:17:54,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:54,485 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 4139 transitions. [2021-06-05 21:17:54,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:17:54,487 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:54,487 INFO L554 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:54,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable542 [2021-06-05 21:17:54,688 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:54,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:54,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1639686362, now seen corresponding path program 101 times [2021-06-05 21:17:54,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:54,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895958569] [2021-06-05 21:17:54,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:54,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:54,731 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:54,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:54,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895958569] [2021-06-05 21:17:54,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895958569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:54,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274853233] [2021-06-05 21:17:54,732 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:54,766 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:17:54,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:54,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:17:54,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:54,796 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:54,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274853233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:54,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:54,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:17:54,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5230329] [2021-06-05 21:17:54,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:17:54,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:54,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:17:54,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:17:54,796 INFO L87 Difference]: Start difference. First operand 1409 states and 4139 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:54,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:54,904 INFO L93 Difference]: Finished difference Result 1616 states and 4431 transitions. [2021-06-05 21:17:54,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:17:54,905 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:17:54,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:54,906 INFO L225 Difference]: With dead ends: 1616 [2021-06-05 21:17:54,906 INFO L226 Difference]: Without dead ends: 1612 [2021-06-05 21:17:54,907 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 81.9ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:17:54,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2021-06-05 21:17:54,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 1392. [2021-06-05 21:17:54,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 2.9281092739036665) internal successors, (4073), 1391 states have internal predecessors, (4073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:54,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 4073 transitions. [2021-06-05 21:17:54,922 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 4073 transitions. Word has length 19 [2021-06-05 21:17:54,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:54,922 INFO L482 AbstractCegarLoop]: Abstraction has 1392 states and 4073 transitions. [2021-06-05 21:17:54,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:54,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 4073 transitions. [2021-06-05 21:17:54,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:17:54,924 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:54,924 INFO L554 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:55,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable543 [2021-06-05 21:17:55,124 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:55,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:55,125 INFO L82 PathProgramCache]: Analyzing trace with hash 78062698, now seen corresponding path program 102 times [2021-06-05 21:17:55,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:55,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519886455] [2021-06-05 21:17:55,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:55,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:55,164 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:55,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:55,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519886455] [2021-06-05 21:17:55,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519886455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:55,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909377161] [2021-06-05 21:17:55,164 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:55,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:17:55,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:55,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:17:55,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:55,220 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:55,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909377161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:55,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:55,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:17:55,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330643032] [2021-06-05 21:17:55,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:17:55,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:55,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:17:55,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:17:55,221 INFO L87 Difference]: Start difference. First operand 1392 states and 4073 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:55,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:55,273 INFO L93 Difference]: Finished difference Result 1671 states and 4517 transitions. [2021-06-05 21:17:55,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:17:55,273 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:17:55,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:55,275 INFO L225 Difference]: With dead ends: 1671 [2021-06-05 21:17:55,275 INFO L226 Difference]: Without dead ends: 1671 [2021-06-05 21:17:55,275 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 42.6ms TimeCoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:17:55,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1671 states. [2021-06-05 21:17:55,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1671 to 1393. [2021-06-05 21:17:55,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1393 states, 1392 states have (on average 2.923132183908046) internal successors, (4069), 1392 states have internal predecessors, (4069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:55,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 4069 transitions. [2021-06-05 21:17:55,291 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 4069 transitions. Word has length 19 [2021-06-05 21:17:55,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:55,291 INFO L482 AbstractCegarLoop]: Abstraction has 1393 states and 4069 transitions. [2021-06-05 21:17:55,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:55,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 4069 transitions. [2021-06-05 21:17:55,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:17:55,292 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:55,292 INFO L554 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:55,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable544 [2021-06-05 21:17:55,493 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:55,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:55,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1650984636, now seen corresponding path program 103 times [2021-06-05 21:17:55,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:55,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132837446] [2021-06-05 21:17:55,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:55,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:55,539 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:55,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:55,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132837446] [2021-06-05 21:17:55,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132837446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:55,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257822395] [2021-06-05 21:17:55,540 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:55,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:55,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:17:55,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:55,612 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:55,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257822395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:55,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:55,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 21:17:55,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733066959] [2021-06-05 21:17:55,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:17:55,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:55,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:17:55,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:17:55,613 INFO L87 Difference]: Start difference. First operand 1393 states and 4069 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:55,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:55,678 INFO L93 Difference]: Finished difference Result 1578 states and 4284 transitions. [2021-06-05 21:17:55,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:17:55,678 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:17:55,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:55,680 INFO L225 Difference]: With dead ends: 1578 [2021-06-05 21:17:55,681 INFO L226 Difference]: Without dead ends: 1578 [2021-06-05 21:17:55,681 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 57.3ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:17:55,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2021-06-05 21:17:55,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 1355. [2021-06-05 21:17:55,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1355 states, 1354 states have (on average 2.9084194977843425) internal successors, (3938), 1354 states have internal predecessors, (3938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:55,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1355 states to 1355 states and 3938 transitions. [2021-06-05 21:17:55,701 INFO L78 Accepts]: Start accepts. Automaton has 1355 states and 3938 transitions. Word has length 19 [2021-06-05 21:17:55,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:55,701 INFO L482 AbstractCegarLoop]: Abstraction has 1355 states and 3938 transitions. [2021-06-05 21:17:55,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:55,701 INFO L276 IsEmpty]: Start isEmpty. Operand 1355 states and 3938 transitions. [2021-06-05 21:17:55,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:17:55,703 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:55,703 INFO L554 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:55,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable545 [2021-06-05 21:17:55,925 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:55,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:55,926 INFO L82 PathProgramCache]: Analyzing trace with hash 583122858, now seen corresponding path program 104 times [2021-06-05 21:17:55,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:55,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119580453] [2021-06-05 21:17:55,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:55,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:55,971 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:55,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:55,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119580453] [2021-06-05 21:17:55,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119580453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:55,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661038995] [2021-06-05 21:17:55,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:55,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:17:55,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:55,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:17:55,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:56,035 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:56,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661038995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:56,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:56,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:17:56,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306100714] [2021-06-05 21:17:56,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:17:56,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:56,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:17:56,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:17:56,036 INFO L87 Difference]: Start difference. First operand 1355 states and 3938 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:56,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:56,123 INFO L93 Difference]: Finished difference Result 1698 states and 4556 transitions. [2021-06-05 21:17:56,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:17:56,124 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:17:56,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:56,126 INFO L225 Difference]: With dead ends: 1698 [2021-06-05 21:17:56,126 INFO L226 Difference]: Without dead ends: 1698 [2021-06-05 21:17:56,126 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 71.5ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:17:56,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2021-06-05 21:17:56,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 1299. [2021-06-05 21:17:56,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 2.8821263482280433) internal successors, (3741), 1298 states have internal predecessors, (3741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:56,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 3741 transitions. [2021-06-05 21:17:56,141 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 3741 transitions. Word has length 19 [2021-06-05 21:17:56,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:56,141 INFO L482 AbstractCegarLoop]: Abstraction has 1299 states and 3741 transitions. [2021-06-05 21:17:56,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:56,141 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 3741 transitions. [2021-06-05 21:17:56,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:17:56,142 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:56,142 INFO L554 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:56,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable546 [2021-06-05 21:17:56,343 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:56,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:56,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1120978436, now seen corresponding path program 105 times [2021-06-05 21:17:56,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:56,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905607621] [2021-06-05 21:17:56,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:56,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:56,411 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:56,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:56,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905607621] [2021-06-05 21:17:56,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905607621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:56,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36925995] [2021-06-05 21:17:56,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:56,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:17:56,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:56,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:17:56,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:56,487 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:56,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36925995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:56,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:56,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:17:56,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275260356] [2021-06-05 21:17:56,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:17:56,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:56,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:17:56,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:17:56,488 INFO L87 Difference]: Start difference. First operand 1299 states and 3741 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:56,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:56,640 INFO L93 Difference]: Finished difference Result 2138 states and 5768 transitions. [2021-06-05 21:17:56,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:17:56,640 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:17:56,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:56,642 INFO L225 Difference]: With dead ends: 2138 [2021-06-05 21:17:56,643 INFO L226 Difference]: Without dead ends: 2138 [2021-06-05 21:17:56,643 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 123.9ms TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:17:56,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2138 states. [2021-06-05 21:17:56,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2138 to 1510. [2021-06-05 21:17:56,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1510 states, 1509 states have (on average 2.952286282306163) internal successors, (4455), 1509 states have internal predecessors, (4455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:56,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 4455 transitions. [2021-06-05 21:17:56,663 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 4455 transitions. Word has length 19 [2021-06-05 21:17:56,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:56,663 INFO L482 AbstractCegarLoop]: Abstraction has 1510 states and 4455 transitions. [2021-06-05 21:17:56,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:56,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 4455 transitions. [2021-06-05 21:17:56,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:17:56,664 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:56,664 INFO L554 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:56,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable547,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:56,865 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:56,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:56,865 INFO L82 PathProgramCache]: Analyzing trace with hash 423925554, now seen corresponding path program 106 times [2021-06-05 21:17:56,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:56,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275684398] [2021-06-05 21:17:56,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:56,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:56,924 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:56,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:56,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275684398] [2021-06-05 21:17:56,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275684398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:56,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111688817] [2021-06-05 21:17:56,924 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:56,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:17:56,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:56,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:17:56,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:56,985 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:56,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111688817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:56,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:56,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:17:56,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852124662] [2021-06-05 21:17:56,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:17:56,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:56,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:17:56,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:17:56,985 INFO L87 Difference]: Start difference. First operand 1510 states and 4455 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:57,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:57,105 INFO L93 Difference]: Finished difference Result 1994 states and 5446 transitions. [2021-06-05 21:17:57,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:17:57,106 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:17:57,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:57,108 INFO L225 Difference]: With dead ends: 1994 [2021-06-05 21:17:57,108 INFO L226 Difference]: Without dead ends: 1994 [2021-06-05 21:17:57,108 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 101.7ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:17:57,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1994 states. [2021-06-05 21:17:57,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1994 to 1216. [2021-06-05 21:17:57,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1216 states, 1215 states have (on average 2.891358024691358) internal successors, (3513), 1215 states have internal predecessors, (3513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:57,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 3513 transitions. [2021-06-05 21:17:57,124 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 3513 transitions. Word has length 19 [2021-06-05 21:17:57,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:57,124 INFO L482 AbstractCegarLoop]: Abstraction has 1216 states and 3513 transitions. [2021-06-05 21:17:57,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:57,124 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 3513 transitions. [2021-06-05 21:17:57,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:17:57,125 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:57,125 INFO L554 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:57,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:57,325 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:57,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:57,326 INFO L82 PathProgramCache]: Analyzing trace with hash -853604306, now seen corresponding path program 107 times [2021-06-05 21:17:57,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:57,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939336221] [2021-06-05 21:17:57,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:57,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:57,373 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:57,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:57,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939336221] [2021-06-05 21:17:57,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939336221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:57,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296331569] [2021-06-05 21:17:57,374 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:57,396 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:17:57,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:57,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:17:57,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:57,424 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:57,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296331569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:57,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:57,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:17:57,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335888055] [2021-06-05 21:17:57,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:17:57,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:57,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:17:57,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:17:57,426 INFO L87 Difference]: Start difference. First operand 1216 states and 3513 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:57,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:57,560 INFO L93 Difference]: Finished difference Result 1394 states and 3767 transitions. [2021-06-05 21:17:57,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:17:57,561 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:17:57,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:57,562 INFO L225 Difference]: With dead ends: 1394 [2021-06-05 21:17:57,563 INFO L226 Difference]: Without dead ends: 1390 [2021-06-05 21:17:57,563 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 101.6ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:17:57,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2021-06-05 21:17:57,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 1183. [2021-06-05 21:17:57,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1183 states, 1182 states have (on average 2.8705583756345177) internal successors, (3393), 1182 states have internal predecessors, (3393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:57,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 3393 transitions. [2021-06-05 21:17:57,595 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 3393 transitions. Word has length 19 [2021-06-05 21:17:57,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:57,595 INFO L482 AbstractCegarLoop]: Abstraction has 1183 states and 3393 transitions. [2021-06-05 21:17:57,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:57,595 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 3393 transitions. [2021-06-05 21:17:57,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:17:57,597 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:57,597 INFO L554 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:57,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable549,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:57,813 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:57,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:57,813 INFO L82 PathProgramCache]: Analyzing trace with hash 864144754, now seen corresponding path program 108 times [2021-06-05 21:17:57,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:57,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822807622] [2021-06-05 21:17:57,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:57,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:57,851 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:57,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:57,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822807622] [2021-06-05 21:17:57,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822807622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:57,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131176073] [2021-06-05 21:17:57,852 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:57,874 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:17:57,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:57,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:17:57,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:57,906 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:57,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131176073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:57,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:57,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:17:57,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138211767] [2021-06-05 21:17:57,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:17:57,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:57,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:17:57,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:17:57,907 INFO L87 Difference]: Start difference. First operand 1183 states and 3393 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:57,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:57,965 INFO L93 Difference]: Finished difference Result 1453 states and 3839 transitions. [2021-06-05 21:17:57,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:17:57,965 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:17:57,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:57,967 INFO L225 Difference]: With dead ends: 1453 [2021-06-05 21:17:57,967 INFO L226 Difference]: Without dead ends: 1453 [2021-06-05 21:17:57,967 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 47.3ms TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:17:57,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1453 states. [2021-06-05 21:17:57,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1453 to 1189. [2021-06-05 21:17:57,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1188 states have (on average 2.8678451178451176) internal successors, (3407), 1188 states have internal predecessors, (3407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:57,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 3407 transitions. [2021-06-05 21:17:57,980 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 3407 transitions. Word has length 19 [2021-06-05 21:17:57,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:57,980 INFO L482 AbstractCegarLoop]: Abstraction has 1189 states and 3407 transitions. [2021-06-05 21:17:57,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:57,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 3407 transitions. [2021-06-05 21:17:57,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:17:57,981 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:57,981 INFO L554 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:58,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:58,181 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:58,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:58,182 INFO L82 PathProgramCache]: Analyzing trace with hash -864902580, now seen corresponding path program 109 times [2021-06-05 21:17:58,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:58,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734038544] [2021-06-05 21:17:58,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:58,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:58,226 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:58,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:58,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734038544] [2021-06-05 21:17:58,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734038544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:58,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830499717] [2021-06-05 21:17:58,227 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:58,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:58,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:17:58,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:58,283 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:58,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830499717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:58,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:58,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:17:58,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253873429] [2021-06-05 21:17:58,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:17:58,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:58,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:17:58,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:17:58,284 INFO L87 Difference]: Start difference. First operand 1189 states and 3407 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:58,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:58,349 INFO L93 Difference]: Finished difference Result 1449 states and 3831 transitions. [2021-06-05 21:17:58,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:17:58,350 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:17:58,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:58,351 INFO L225 Difference]: With dead ends: 1449 [2021-06-05 21:17:58,351 INFO L226 Difference]: Without dead ends: 1449 [2021-06-05 21:17:58,351 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 59.7ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:17:58,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1449 states. [2021-06-05 21:17:58,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1449 to 1136. [2021-06-05 21:17:58,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 2.845814977973568) internal successors, (3230), 1135 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:58,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 3230 transitions. [2021-06-05 21:17:58,364 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 3230 transitions. Word has length 19 [2021-06-05 21:17:58,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:58,364 INFO L482 AbstractCegarLoop]: Abstraction has 1136 states and 3230 transitions. [2021-06-05 21:17:58,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:58,364 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 3230 transitions. [2021-06-05 21:17:58,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:17:58,365 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:58,365 INFO L554 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:58,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable551 [2021-06-05 21:17:58,566 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:58,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:58,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1369204914, now seen corresponding path program 110 times [2021-06-05 21:17:58,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:58,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967759526] [2021-06-05 21:17:58,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:58,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:58,627 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:58,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:58,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967759526] [2021-06-05 21:17:58,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967759526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:58,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640573362] [2021-06-05 21:17:58,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:58,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:17:58,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:58,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:17:58,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:58,700 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:58,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640573362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:58,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:58,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:17:58,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464356992] [2021-06-05 21:17:58,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:17:58,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:58,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:17:58,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:17:58,701 INFO L87 Difference]: Start difference. First operand 1136 states and 3230 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:58,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:58,755 INFO L93 Difference]: Finished difference Result 1670 states and 4515 transitions. [2021-06-05 21:17:58,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:17:58,756 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:17:58,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:58,757 INFO L225 Difference]: With dead ends: 1670 [2021-06-05 21:17:58,757 INFO L226 Difference]: Without dead ends: 1670 [2021-06-05 21:17:58,757 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 61.6ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:17:58,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2021-06-05 21:17:58,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 1470. [2021-06-05 21:17:58,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1470 states, 1469 states have (on average 2.888359428182437) internal successors, (4243), 1469 states have internal predecessors, (4243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:58,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1470 states to 1470 states and 4243 transitions. [2021-06-05 21:17:58,776 INFO L78 Accepts]: Start accepts. Automaton has 1470 states and 4243 transitions. Word has length 19 [2021-06-05 21:17:58,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:58,776 INFO L482 AbstractCegarLoop]: Abstraction has 1470 states and 4243 transitions. [2021-06-05 21:17:58,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:58,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1470 states and 4243 transitions. [2021-06-05 21:17:58,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:17:58,778 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:58,778 INFO L554 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:58,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable552 [2021-06-05 21:17:58,978 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:58,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:58,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1907060492, now seen corresponding path program 111 times [2021-06-05 21:17:58,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:58,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90992185] [2021-06-05 21:17:58,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:58,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:59,033 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:59,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:59,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90992185] [2021-06-05 21:17:59,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90992185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:59,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598502859] [2021-06-05 21:17:59,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:59,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:17:59,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:59,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:17:59,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:59,102 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:59,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598502859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:59,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:59,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:17:59,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728672055] [2021-06-05 21:17:59,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:17:59,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:59,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:17:59,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:17:59,102 INFO L87 Difference]: Start difference. First operand 1470 states and 4243 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:59,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:59,206 INFO L93 Difference]: Finished difference Result 1718 states and 4617 transitions. [2021-06-05 21:17:59,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:17:59,206 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:17:59,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:59,208 INFO L225 Difference]: With dead ends: 1718 [2021-06-05 21:17:59,208 INFO L226 Difference]: Without dead ends: 1718 [2021-06-05 21:17:59,208 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 88.1ms TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:17:59,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2021-06-05 21:17:59,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 1404. [2021-06-05 21:17:59,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 1403 states have (on average 2.879543834640057) internal successors, (4040), 1403 states have internal predecessors, (4040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:59,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 4040 transitions. [2021-06-05 21:17:59,223 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 4040 transitions. Word has length 19 [2021-06-05 21:17:59,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:59,223 INFO L482 AbstractCegarLoop]: Abstraction has 1404 states and 4040 transitions. [2021-06-05 21:17:59,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:59,223 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 4040 transitions. [2021-06-05 21:17:59,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:17:59,224 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:59,225 INFO L554 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:59,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable553 [2021-06-05 21:17:59,432 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:59,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:59,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1400714226, now seen corresponding path program 112 times [2021-06-05 21:17:59,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:59,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785255861] [2021-06-05 21:17:59,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:59,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:59,488 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:59,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:59,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785255861] [2021-06-05 21:17:59,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785255861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:59,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188333639] [2021-06-05 21:17:59,488 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:59,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:17:59,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:59,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:17:59,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:59,561 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:59,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188333639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:59,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:59,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:17:59,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936053469] [2021-06-05 21:17:59,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:17:59,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:59,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:17:59,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:17:59,562 INFO L87 Difference]: Start difference. First operand 1404 states and 4040 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:59,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:59,716 INFO L93 Difference]: Finished difference Result 1961 states and 5383 transitions. [2021-06-05 21:17:59,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:17:59,717 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:17:59,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:59,718 INFO L225 Difference]: With dead ends: 1961 [2021-06-05 21:17:59,718 INFO L226 Difference]: Without dead ends: 1961 [2021-06-05 21:17:59,719 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 141.0ms TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:17:59,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2021-06-05 21:17:59,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1643. [2021-06-05 21:17:59,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1643 states, 1642 states have (on average 2.933617539585871) internal successors, (4817), 1642 states have internal predecessors, (4817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:59,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 4817 transitions. [2021-06-05 21:17:59,736 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 4817 transitions. Word has length 19 [2021-06-05 21:17:59,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:59,736 INFO L482 AbstractCegarLoop]: Abstraction has 1643 states and 4817 transitions. [2021-06-05 21:17:59,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:59,736 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 4817 transitions. [2021-06-05 21:17:59,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:17:59,738 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:59,738 INFO L554 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:59,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable554 [2021-06-05 21:17:59,953 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:59,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:59,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1043037158, now seen corresponding path program 113 times [2021-06-05 21:17:59,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:59,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959697309] [2021-06-05 21:17:59,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:59,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:00,003 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:00,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:00,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959697309] [2021-06-05 21:18:00,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959697309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:00,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285912113] [2021-06-05 21:18:00,004 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:00,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:18:00,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:00,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:18:00,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:00,054 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:00,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285912113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:00,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:00,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:18:00,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469126235] [2021-06-05 21:18:00,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:18:00,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:00,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:18:00,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:18:00,055 INFO L87 Difference]: Start difference. First operand 1643 states and 4817 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:00,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:00,189 INFO L93 Difference]: Finished difference Result 1862 states and 5178 transitions. [2021-06-05 21:18:00,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:18:00,189 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:18:00,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:00,191 INFO L225 Difference]: With dead ends: 1862 [2021-06-05 21:18:00,191 INFO L226 Difference]: Without dead ends: 1856 [2021-06-05 21:18:00,191 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 102.7ms TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:18:00,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1856 states. [2021-06-05 21:18:00,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1856 to 1674. [2021-06-05 21:18:00,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1673 states have (on average 2.9414225941422596) internal successors, (4921), 1673 states have internal predecessors, (4921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:00,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 4921 transitions. [2021-06-05 21:18:00,210 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 4921 transitions. Word has length 19 [2021-06-05 21:18:00,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:00,210 INFO L482 AbstractCegarLoop]: Abstraction has 1674 states and 4921 transitions. [2021-06-05 21:18:00,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:00,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 4921 transitions. [2021-06-05 21:18:00,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:18:00,212 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:00,212 INFO L554 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:00,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable555,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:00,413 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:00,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:00,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1871868906, now seen corresponding path program 114 times [2021-06-05 21:18:00,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:00,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982460782] [2021-06-05 21:18:00,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:00,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:00,460 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:00,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:00,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982460782] [2021-06-05 21:18:00,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982460782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:00,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218815705] [2021-06-05 21:18:00,460 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:00,483 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:18:00,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:00,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:18:00,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:00,522 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:00,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218815705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:00,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:00,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:18:00,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49951351] [2021-06-05 21:18:00,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:18:00,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:00,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:18:00,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:18:00,523 INFO L87 Difference]: Start difference. First operand 1674 states and 4921 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:00,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:00,577 INFO L93 Difference]: Finished difference Result 1907 states and 5367 transitions. [2021-06-05 21:18:00,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:18:00,578 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:18:00,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:00,579 INFO L225 Difference]: With dead ends: 1907 [2021-06-05 21:18:00,579 INFO L226 Difference]: Without dead ends: 1907 [2021-06-05 21:18:00,580 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 54.9ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:18:00,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1907 states. [2021-06-05 21:18:00,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1907 to 1673. [2021-06-05 21:18:00,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1673 states, 1672 states have (on average 2.9318181818181817) internal successors, (4902), 1672 states have internal predecessors, (4902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:00,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 4902 transitions. [2021-06-05 21:18:00,604 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 4902 transitions. Word has length 19 [2021-06-05 21:18:00,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:00,604 INFO L482 AbstractCegarLoop]: Abstraction has 1673 states and 4902 transitions. [2021-06-05 21:18:00,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:00,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 4902 transitions. [2021-06-05 21:18:00,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:18:00,606 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:00,606 INFO L554 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:00,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable556 [2021-06-05 21:18:00,806 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:00,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:00,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1885242812, now seen corresponding path program 115 times [2021-06-05 21:18:00,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:00,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385155694] [2021-06-05 21:18:00,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:00,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:00,867 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:00,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:00,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385155694] [2021-06-05 21:18:00,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385155694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:00,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052970499] [2021-06-05 21:18:00,867 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:00,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:00,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:18:00,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:00,933 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:00,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052970499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:00,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:00,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:18:00,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433058730] [2021-06-05 21:18:00,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:18:00,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:00,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:18:00,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:18:00,934 INFO L87 Difference]: Start difference. First operand 1673 states and 4902 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:01,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:01,042 INFO L93 Difference]: Finished difference Result 1965 states and 5492 transitions. [2021-06-05 21:18:01,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:18:01,043 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:18:01,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:01,044 INFO L225 Difference]: With dead ends: 1965 [2021-06-05 21:18:01,045 INFO L226 Difference]: Without dead ends: 1965 [2021-06-05 21:18:01,045 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 99.9ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:18:01,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1965 states. [2021-06-05 21:18:01,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1965 to 1412. [2021-06-05 21:18:01,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1411 states have (on average 2.888731396172927) internal successors, (4076), 1411 states have internal predecessors, (4076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:01,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 4076 transitions. [2021-06-05 21:18:01,065 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 4076 transitions. Word has length 19 [2021-06-05 21:18:01,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:01,065 INFO L482 AbstractCegarLoop]: Abstraction has 1412 states and 4076 transitions. [2021-06-05 21:18:01,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:01,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 4076 transitions. [2021-06-05 21:18:01,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:18:01,066 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:01,066 INFO L554 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:01,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable557,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:01,267 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:01,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:01,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1903378218, now seen corresponding path program 116 times [2021-06-05 21:18:01,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:01,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373528239] [2021-06-05 21:18:01,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:01,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:01,321 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:01,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:01,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373528239] [2021-06-05 21:18:01,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373528239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:01,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144377705] [2021-06-05 21:18:01,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:01,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:18:01,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:01,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:18:01,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:01,379 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:01,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144377705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:01,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:01,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:18:01,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036830257] [2021-06-05 21:18:01,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:18:01,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:01,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:18:01,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:18:01,381 INFO L87 Difference]: Start difference. First operand 1412 states and 4076 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:01,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:01,539 INFO L93 Difference]: Finished difference Result 1975 states and 5352 transitions. [2021-06-05 21:18:01,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:18:01,540 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:18:01,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:01,542 INFO L225 Difference]: With dead ends: 1975 [2021-06-05 21:18:01,542 INFO L226 Difference]: Without dead ends: 1975 [2021-06-05 21:18:01,542 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 137.2ms TimeCoverageRelationStatistics Valid=220, Invalid=430, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:18:01,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2021-06-05 21:18:01,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 1385. [2021-06-05 21:18:01,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1385 states, 1384 states have (on average 2.9010115606936417) internal successors, (4015), 1384 states have internal predecessors, (4015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:01,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1385 states to 1385 states and 4015 transitions. [2021-06-05 21:18:01,557 INFO L78 Accepts]: Start accepts. Automaton has 1385 states and 4015 transitions. Word has length 19 [2021-06-05 21:18:01,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:01,557 INFO L482 AbstractCegarLoop]: Abstraction has 1385 states and 4015 transitions. [2021-06-05 21:18:01,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:01,557 INFO L276 IsEmpty]: Start isEmpty. Operand 1385 states and 4015 transitions. [2021-06-05 21:18:01,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:18:01,558 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:01,558 INFO L554 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:01,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable558 [2021-06-05 21:18:01,761 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:01,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:01,761 INFO L82 PathProgramCache]: Analyzing trace with hash 2143162372, now seen corresponding path program 117 times [2021-06-05 21:18:01,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:01,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807245998] [2021-06-05 21:18:01,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:01,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:01,803 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:01,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:01,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807245998] [2021-06-05 21:18:01,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807245998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:01,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189688820] [2021-06-05 21:18:01,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:01,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:18:01,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:01,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:18:01,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:01,869 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:01,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189688820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:01,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:01,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:18:01,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423378630] [2021-06-05 21:18:01,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:18:01,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:01,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:18:01,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:18:01,870 INFO L87 Difference]: Start difference. First operand 1385 states and 4015 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:01,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:01,979 INFO L93 Difference]: Finished difference Result 1517 states and 4176 transitions. [2021-06-05 21:18:01,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:18:01,979 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:18:01,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:01,980 INFO L225 Difference]: With dead ends: 1517 [2021-06-05 21:18:01,981 INFO L226 Difference]: Without dead ends: 1513 [2021-06-05 21:18:01,981 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 77.9ms TimeCoverageRelationStatistics Valid=119, Invalid=223, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:18:01,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1513 states. [2021-06-05 21:18:02,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1513 to 1380. [2021-06-05 21:18:02,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 2.897026831036983) internal successors, (3995), 1379 states have internal predecessors, (3995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:02,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 3995 transitions. [2021-06-05 21:18:02,009 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 3995 transitions. Word has length 19 [2021-06-05 21:18:02,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:02,010 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 3995 transitions. [2021-06-05 21:18:02,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:02,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 3995 transitions. [2021-06-05 21:18:02,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:18:02,011 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:02,011 INFO L554 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:02,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable559 [2021-06-05 21:18:02,211 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:02,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:02,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1266911364, now seen corresponding path program 118 times [2021-06-05 21:18:02,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:02,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760209932] [2021-06-05 21:18:02,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:02,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:02,263 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:02,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:02,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760209932] [2021-06-05 21:18:02,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760209932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:02,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464022825] [2021-06-05 21:18:02,264 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:02,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:18:02,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:02,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:18:02,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:02,322 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:02,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464022825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:02,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:02,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:18:02,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005098496] [2021-06-05 21:18:02,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:18:02,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:02,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:18:02,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:18:02,323 INFO L87 Difference]: Start difference. First operand 1380 states and 3995 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:02,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:02,470 INFO L93 Difference]: Finished difference Result 1622 states and 4384 transitions. [2021-06-05 21:18:02,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:18:02,470 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:18:02,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:02,472 INFO L225 Difference]: With dead ends: 1622 [2021-06-05 21:18:02,472 INFO L226 Difference]: Without dead ends: 1622 [2021-06-05 21:18:02,472 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 130.8ms TimeCoverageRelationStatistics Valid=223, Invalid=427, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:18:02,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2021-06-05 21:18:02,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1221. [2021-06-05 21:18:02,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1220 states have (on average 2.8721311475409834) internal successors, (3504), 1220 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:02,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 3504 transitions. [2021-06-05 21:18:02,484 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 3504 transitions. Word has length 19 [2021-06-05 21:18:02,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:02,484 INFO L482 AbstractCegarLoop]: Abstraction has 1221 states and 3504 transitions. [2021-06-05 21:18:02,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:02,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 3504 transitions. [2021-06-05 21:18:02,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:18:02,485 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:02,486 INFO L554 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:02,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable560,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:02,686 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:02,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:02,686 INFO L82 PathProgramCache]: Analyzing trace with hash 2040102950, now seen corresponding path program 119 times [2021-06-05 21:18:02,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:02,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700977226] [2021-06-05 21:18:02,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:02,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:02,729 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:02,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:02,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700977226] [2021-06-05 21:18:02,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700977226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:02,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105611988] [2021-06-05 21:18:02,729 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:02,753 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:18:02,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:02,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:18:02,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:02,793 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:02,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105611988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:02,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:02,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:18:02,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794131392] [2021-06-05 21:18:02,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:18:02,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:02,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:18:02,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:18:02,794 INFO L87 Difference]: Start difference. First operand 1221 states and 3504 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:02,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:02,891 INFO L93 Difference]: Finished difference Result 1376 states and 3711 transitions. [2021-06-05 21:18:02,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:18:02,891 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:18:02,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:02,893 INFO L225 Difference]: With dead ends: 1376 [2021-06-05 21:18:02,893 INFO L226 Difference]: Without dead ends: 1372 [2021-06-05 21:18:02,893 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 69.5ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:18:02,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1372 states. [2021-06-05 21:18:02,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1372 to 1231. [2021-06-05 21:18:02,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 1230 states have (on average 2.873170731707317) internal successors, (3534), 1230 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:02,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 3534 transitions. [2021-06-05 21:18:02,911 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 3534 transitions. Word has length 19 [2021-06-05 21:18:02,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:02,912 INFO L482 AbstractCegarLoop]: Abstraction has 1231 states and 3534 transitions. [2021-06-05 21:18:02,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:02,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 3534 transitions. [2021-06-05 21:18:02,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:18:02,913 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:02,913 INFO L554 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:03,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:03,137 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:03,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:03,137 INFO L82 PathProgramCache]: Analyzing trace with hash -537115286, now seen corresponding path program 120 times [2021-06-05 21:18:03,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:03,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970844752] [2021-06-05 21:18:03,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:03,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:03,177 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:03,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:03,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970844752] [2021-06-05 21:18:03,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970844752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:03,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670948905] [2021-06-05 21:18:03,178 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:03,200 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:18:03,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:03,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:18:03,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:03,233 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:03,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670948905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:03,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:03,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:18:03,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846707986] [2021-06-05 21:18:03,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:18:03,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:03,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:18:03,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:18:03,234 INFO L87 Difference]: Start difference. First operand 1231 states and 3534 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:03,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:03,299 INFO L93 Difference]: Finished difference Result 1459 states and 3899 transitions. [2021-06-05 21:18:03,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:18:03,300 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:18:03,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:03,301 INFO L225 Difference]: With dead ends: 1459 [2021-06-05 21:18:03,301 INFO L226 Difference]: Without dead ends: 1459 [2021-06-05 21:18:03,301 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 55.0ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:18:03,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1459 states. [2021-06-05 21:18:03,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1459 to 1232. [2021-06-05 21:18:03,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1232 states, 1231 states have (on average 2.8732737611697807) internal successors, (3537), 1231 states have internal predecessors, (3537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:03,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 3537 transitions. [2021-06-05 21:18:03,314 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 3537 transitions. Word has length 19 [2021-06-05 21:18:03,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:03,314 INFO L482 AbstractCegarLoop]: Abstraction has 1232 states and 3537 transitions. [2021-06-05 21:18:03,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:03,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 3537 transitions. [2021-06-05 21:18:03,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:18:03,315 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:03,316 INFO L554 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:03,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable562 [2021-06-05 21:18:03,528 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:03,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:03,528 INFO L82 PathProgramCache]: Analyzing trace with hash 2028804676, now seen corresponding path program 121 times [2021-06-05 21:18:03,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:03,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208435910] [2021-06-05 21:18:03,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:03,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:03,568 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:03,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:03,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208435910] [2021-06-05 21:18:03,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208435910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:03,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010678336] [2021-06-05 21:18:03,568 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:03,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:03,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:18:03,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:03,635 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:03,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010678336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:03,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:03,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 21:18:03,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218787691] [2021-06-05 21:18:03,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:18:03,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:03,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:18:03,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:18:03,636 INFO L87 Difference]: Start difference. First operand 1232 states and 3537 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:03,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:03,728 INFO L93 Difference]: Finished difference Result 1479 states and 3939 transitions. [2021-06-05 21:18:03,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:18:03,728 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:18:03,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:03,730 INFO L225 Difference]: With dead ends: 1479 [2021-06-05 21:18:03,730 INFO L226 Difference]: Without dead ends: 1479 [2021-06-05 21:18:03,730 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 73.2ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:18:03,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1479 states. [2021-06-05 21:18:03,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1479 to 1233. [2021-06-05 21:18:03,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 1232 states have (on average 2.8733766233766236) internal successors, (3540), 1232 states have internal predecessors, (3540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:03,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 3540 transitions. [2021-06-05 21:18:03,742 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 3540 transitions. Word has length 19 [2021-06-05 21:18:03,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:03,742 INFO L482 AbstractCegarLoop]: Abstraction has 1233 states and 3540 transitions. [2021-06-05 21:18:03,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:03,743 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 3540 transitions. [2021-06-05 21:18:03,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:18:03,744 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:03,744 INFO L554 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:03,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable563,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:03,945 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:03,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:03,946 INFO L82 PathProgramCache]: Analyzing trace with hash -32055126, now seen corresponding path program 122 times [2021-06-05 21:18:03,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:03,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893116389] [2021-06-05 21:18:03,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:03,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:03,999 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:03,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:03,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893116389] [2021-06-05 21:18:03,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893116389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:03,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402176394] [2021-06-05 21:18:03,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:04,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:18:04,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:04,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:18:04,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:04,060 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:04,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402176394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:04,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:04,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:18:04,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919323473] [2021-06-05 21:18:04,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:18:04,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:04,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:18:04,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:18:04,061 INFO L87 Difference]: Start difference. First operand 1233 states and 3540 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:04,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:04,144 INFO L93 Difference]: Finished difference Result 1443 states and 3863 transitions. [2021-06-05 21:18:04,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:18:04,144 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:18:04,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:04,145 INFO L225 Difference]: With dead ends: 1443 [2021-06-05 21:18:04,145 INFO L226 Difference]: Without dead ends: 1443 [2021-06-05 21:18:04,145 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 80.2ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:18:04,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2021-06-05 21:18:04,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 1226. [2021-06-05 21:18:04,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 1225 states have (on average 2.874285714285714) internal successors, (3521), 1225 states have internal predecessors, (3521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:04,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 3521 transitions. [2021-06-05 21:18:04,159 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 3521 transitions. Word has length 19 [2021-06-05 21:18:04,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:04,159 INFO L482 AbstractCegarLoop]: Abstraction has 1226 states and 3521 transitions. [2021-06-05 21:18:04,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:04,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 3521 transitions. [2021-06-05 21:18:04,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:18:04,160 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:04,160 INFO L554 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:04,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable564 [2021-06-05 21:18:04,361 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:04,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:04,361 INFO L82 PathProgramCache]: Analyzing trace with hash 505800452, now seen corresponding path program 123 times [2021-06-05 21:18:04,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:04,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580607108] [2021-06-05 21:18:04,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:04,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:04,416 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:04,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:04,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580607108] [2021-06-05 21:18:04,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580607108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:04,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778950050] [2021-06-05 21:18:04,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:04,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:18:04,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:04,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:18:04,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:04,481 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:04,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778950050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:04,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:04,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:18:04,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669365742] [2021-06-05 21:18:04,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:18:04,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:04,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:18:04,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:18:04,482 INFO L87 Difference]: Start difference. First operand 1226 states and 3521 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:04,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:04,554 INFO L93 Difference]: Finished difference Result 1646 states and 4470 transitions. [2021-06-05 21:18:04,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:18:04,554 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:18:04,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:04,555 INFO L225 Difference]: With dead ends: 1646 [2021-06-05 21:18:04,555 INFO L226 Difference]: Without dead ends: 1646 [2021-06-05 21:18:04,556 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 77.8ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:18:04,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2021-06-05 21:18:04,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1435. [2021-06-05 21:18:04,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1435 states, 1434 states have (on average 2.8870292887029287) internal successors, (4140), 1434 states have internal predecessors, (4140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:04,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1435 states to 1435 states and 4140 transitions. [2021-06-05 21:18:04,569 INFO L78 Accepts]: Start accepts. Automaton has 1435 states and 4140 transitions. Word has length 19 [2021-06-05 21:18:04,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:04,569 INFO L482 AbstractCegarLoop]: Abstraction has 1435 states and 4140 transitions. [2021-06-05 21:18:04,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:04,570 INFO L276 IsEmpty]: Start isEmpty. Operand 1435 states and 4140 transitions. [2021-06-05 21:18:04,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:18:04,571 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:04,571 INFO L554 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:04,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable565 [2021-06-05 21:18:04,773 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:04,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:04,773 INFO L82 PathProgramCache]: Analyzing trace with hash -545814, now seen corresponding path program 124 times [2021-06-05 21:18:04,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:04,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482802679] [2021-06-05 21:18:04,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:04,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:04,844 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:04,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:04,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482802679] [2021-06-05 21:18:04,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482802679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:04,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753837985] [2021-06-05 21:18:04,845 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:04,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:18:04,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:04,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:18:04,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:04,910 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:04,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753837985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:04,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:04,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:18:04,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311299442] [2021-06-05 21:18:04,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:18:04,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:04,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:18:04,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:18:04,911 INFO L87 Difference]: Start difference. First operand 1435 states and 4140 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:05,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:05,064 INFO L93 Difference]: Finished difference Result 1661 states and 4495 transitions. [2021-06-05 21:18:05,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:18:05,064 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:18:05,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:05,067 INFO L225 Difference]: With dead ends: 1661 [2021-06-05 21:18:05,067 INFO L226 Difference]: Without dead ends: 1661 [2021-06-05 21:18:05,067 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 123.7ms TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:18:05,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2021-06-05 21:18:05,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1435. [2021-06-05 21:18:05,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1435 states, 1434 states have (on average 2.8870292887029287) internal successors, (4140), 1434 states have internal predecessors, (4140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:05,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1435 states to 1435 states and 4140 transitions. [2021-06-05 21:18:05,089 INFO L78 Accepts]: Start accepts. Automaton has 1435 states and 4140 transitions. Word has length 19 [2021-06-05 21:18:05,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:05,089 INFO L482 AbstractCegarLoop]: Abstraction has 1435 states and 4140 transitions. [2021-06-05 21:18:05,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:05,089 INFO L276 IsEmpty]: Start isEmpty. Operand 1435 states and 4140 transitions. [2021-06-05 21:18:05,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:18:05,091 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:05,091 INFO L554 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:05,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable566 [2021-06-05 21:18:05,293 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:05,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:05,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1482589124, now seen corresponding path program 125 times [2021-06-05 21:18:05,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:05,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629855093] [2021-06-05 21:18:05,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:05,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:05,348 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:05,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:05,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629855093] [2021-06-05 21:18:05,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629855093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:05,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130359155] [2021-06-05 21:18:05,349 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:05,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:18:05,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:05,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:18:05,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:05,413 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:05,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130359155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:05,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:05,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:18:05,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571320311] [2021-06-05 21:18:05,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:18:05,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:05,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:18:05,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:18:05,414 INFO L87 Difference]: Start difference. First operand 1435 states and 4140 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:05,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:05,617 INFO L93 Difference]: Finished difference Result 1853 states and 5030 transitions. [2021-06-05 21:18:05,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:18:05,618 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:18:05,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:05,620 INFO L225 Difference]: With dead ends: 1853 [2021-06-05 21:18:05,620 INFO L226 Difference]: Without dead ends: 1853 [2021-06-05 21:18:05,620 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 180.9ms TimeCoverageRelationStatistics Valid=293, Invalid=577, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:18:05,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1853 states. [2021-06-05 21:18:05,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1853 to 1564. [2021-06-05 21:18:05,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1564 states, 1563 states have (on average 2.9021113243762) internal successors, (4536), 1563 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:05,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 4536 transitions. [2021-06-05 21:18:05,636 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 4536 transitions. Word has length 19 [2021-06-05 21:18:05,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:05,636 INFO L482 AbstractCegarLoop]: Abstraction has 1564 states and 4536 transitions. [2021-06-05 21:18:05,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:05,637 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 4536 transitions. [2021-06-05 21:18:05,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:18:05,638 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:05,638 INFO L554 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:05,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable567,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:05,853 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:05,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:05,853 INFO L82 PathProgramCache]: Analyzing trace with hash -554248274, now seen corresponding path program 126 times [2021-06-05 21:18:05,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:05,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376465255] [2021-06-05 21:18:05,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:05,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:05,919 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:05,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:05,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376465255] [2021-06-05 21:18:05,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376465255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:05,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061810862] [2021-06-05 21:18:05,919 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:05,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:18:05,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:05,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:18:05,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:05,980 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:05,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061810862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:05,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:05,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-06-05 21:18:05,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431590641] [2021-06-05 21:18:05,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:18:05,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:05,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:18:05,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:18:05,981 INFO L87 Difference]: Start difference. First operand 1564 states and 4536 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:06,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:06,161 INFO L93 Difference]: Finished difference Result 1749 states and 4790 transitions. [2021-06-05 21:18:06,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:18:06,161 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:18:06,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:06,163 INFO L225 Difference]: With dead ends: 1749 [2021-06-05 21:18:06,163 INFO L226 Difference]: Without dead ends: 1743 [2021-06-05 21:18:06,163 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 149.8ms TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:18:06,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1743 states. [2021-06-05 21:18:06,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1743 to 1529. [2021-06-05 21:18:06,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 2.8841623036649215) internal successors, (4407), 1528 states have internal predecessors, (4407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:06,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 4407 transitions. [2021-06-05 21:18:06,184 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 4407 transitions. Word has length 19 [2021-06-05 21:18:06,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:06,184 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 4407 transitions. [2021-06-05 21:18:06,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:06,184 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 4407 transitions. [2021-06-05 21:18:06,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:18:06,186 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:06,186 INFO L554 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:06,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable568 [2021-06-05 21:18:06,408 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:06,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:06,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1091484980, now seen corresponding path program 127 times [2021-06-05 21:18:06,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:06,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797727617] [2021-06-05 21:18:06,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:06,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:06,462 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:06,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:06,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797727617] [2021-06-05 21:18:06,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797727617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:06,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111962912] [2021-06-05 21:18:06,462 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:06,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:06,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:18:06,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:06,544 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:06,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111962912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:06,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:06,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-05 21:18:06,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767890466] [2021-06-05 21:18:06,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:18:06,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:06,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:18:06,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:18:06,545 INFO L87 Difference]: Start difference. First operand 1529 states and 4407 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:06,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:06,687 INFO L93 Difference]: Finished difference Result 1732 states and 4850 transitions. [2021-06-05 21:18:06,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:18:06,688 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:18:06,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:06,689 INFO L225 Difference]: With dead ends: 1732 [2021-06-05 21:18:06,689 INFO L226 Difference]: Without dead ends: 1732 [2021-06-05 21:18:06,689 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 150.0ms TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:18:06,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1732 states. [2021-06-05 21:18:06,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1732 to 1596. [2021-06-05 21:18:06,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1596 states, 1595 states have (on average 2.889655172413793) internal successors, (4609), 1595 states have internal predecessors, (4609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:06,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1596 states to 1596 states and 4609 transitions. [2021-06-05 21:18:06,704 INFO L78 Accepts]: Start accepts. Automaton has 1596 states and 4609 transitions. Word has length 19 [2021-06-05 21:18:06,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:06,705 INFO L482 AbstractCegarLoop]: Abstraction has 1596 states and 4609 transitions. [2021-06-05 21:18:06,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:06,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1596 states and 4609 transitions. [2021-06-05 21:18:06,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:18:06,706 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:06,706 INFO L554 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:06,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable569 [2021-06-05 21:18:06,907 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:06,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:06,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1597831246, now seen corresponding path program 128 times [2021-06-05 21:18:06,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:06,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042857793] [2021-06-05 21:18:06,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:06,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:06,969 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:06,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:06,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042857793] [2021-06-05 21:18:06,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042857793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:06,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056912160] [2021-06-05 21:18:06,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:07,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:18:07,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:07,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:18:07,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:07,068 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:07,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056912160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:07,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:07,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-05 21:18:07,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551006433] [2021-06-05 21:18:07,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:18:07,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:07,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:18:07,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:18:07,069 INFO L87 Difference]: Start difference. First operand 1596 states and 4609 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:07,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:07,302 INFO L93 Difference]: Finished difference Result 1746 states and 4863 transitions. [2021-06-05 21:18:07,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:18:07,302 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:18:07,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:07,304 INFO L225 Difference]: With dead ends: 1746 [2021-06-05 21:18:07,304 INFO L226 Difference]: Without dead ends: 1746 [2021-06-05 21:18:07,307 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 200.0ms TimeCoverageRelationStatistics Valid=331, Invalid=661, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:18:07,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1746 states. [2021-06-05 21:18:07,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1746 to 1507. [2021-06-05 21:18:07,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1507 states, 1506 states have (on average 2.8771580345285526) internal successors, (4333), 1506 states have internal predecessors, (4333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:07,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1507 states to 1507 states and 4333 transitions. [2021-06-05 21:18:07,327 INFO L78 Accepts]: Start accepts. Automaton has 1507 states and 4333 transitions. Word has length 19 [2021-06-05 21:18:07,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:07,327 INFO L482 AbstractCegarLoop]: Abstraction has 1507 states and 4333 transitions. [2021-06-05 21:18:07,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:07,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1507 states and 4333 transitions. [2021-06-05 21:18:07,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:18:07,330 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:07,330 INFO L554 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:07,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable570,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:07,552 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:07,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:07,553 INFO L82 PathProgramCache]: Analyzing trace with hash -114696308, now seen corresponding path program 129 times [2021-06-05 21:18:07,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:07,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113315298] [2021-06-05 21:18:07,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:07,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:07,621 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:07,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:07,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113315298] [2021-06-05 21:18:07,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113315298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:07,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750036933] [2021-06-05 21:18:07,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:07,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:18:07,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:07,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:18:07,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:07,724 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:07,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750036933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:07,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:07,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-05 21:18:07,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015356823] [2021-06-05 21:18:07,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:18:07,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:07,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:18:07,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:18:07,725 INFO L87 Difference]: Start difference. First operand 1507 states and 4333 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:08,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:08,017 INFO L93 Difference]: Finished difference Result 1884 states and 5161 transitions. [2021-06-05 21:18:08,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:18:08,018 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:18:08,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:08,020 INFO L225 Difference]: With dead ends: 1884 [2021-06-05 21:18:08,020 INFO L226 Difference]: Without dead ends: 1884 [2021-06-05 21:18:08,020 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 257.2ms TimeCoverageRelationStatistics Valid=395, Invalid=795, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:18:08,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2021-06-05 21:18:08,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1484. [2021-06-05 21:18:08,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1484 states, 1483 states have (on average 2.8792987188132164) internal successors, (4270), 1483 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:08,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 4270 transitions. [2021-06-05 21:18:08,044 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 4270 transitions. Word has length 19 [2021-06-05 21:18:08,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:08,044 INFO L482 AbstractCegarLoop]: Abstraction has 1484 states and 4270 transitions. [2021-06-05 21:18:08,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:08,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 4270 transitions. [2021-06-05 21:18:08,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:18:08,047 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:08,047 INFO L554 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:08,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable571,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:08,270 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:08,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:08,271 INFO L82 PathProgramCache]: Analyzing trace with hash -2004726350, now seen corresponding path program 130 times [2021-06-05 21:18:08,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:08,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008461172] [2021-06-05 21:18:08,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:08,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:08,333 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:08,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:08,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008461172] [2021-06-05 21:18:08,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008461172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:08,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194609176] [2021-06-05 21:18:08,333 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:08,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:18:08,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:08,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:18:08,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:08,390 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:08,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194609176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:08,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:08,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-06-05 21:18:08,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350750079] [2021-06-05 21:18:08,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:18:08,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:08,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:18:08,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:18:08,391 INFO L87 Difference]: Start difference. First operand 1484 states and 4270 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:08,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:08,541 INFO L93 Difference]: Finished difference Result 1607 states and 4421 transitions. [2021-06-05 21:18:08,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:18:08,541 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:18:08,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:08,543 INFO L225 Difference]: With dead ends: 1607 [2021-06-05 21:18:08,543 INFO L226 Difference]: Without dead ends: 1603 [2021-06-05 21:18:08,543 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 128.9ms TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:18:08,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1603 states. [2021-06-05 21:18:08,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1603 to 1484. [2021-06-05 21:18:08,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1484 states, 1483 states have (on average 2.8772757923128793) internal successors, (4267), 1483 states have internal predecessors, (4267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:08,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 4267 transitions. [2021-06-05 21:18:08,558 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 4267 transitions. Word has length 19 [2021-06-05 21:18:08,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:08,558 INFO L482 AbstractCegarLoop]: Abstraction has 1484 states and 4267 transitions. [2021-06-05 21:18:08,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:08,558 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 4267 transitions. [2021-06-05 21:18:08,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:18:08,560 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:08,560 INFO L554 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:08,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable572,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:08,781 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:08,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:08,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1629667698, now seen corresponding path program 131 times [2021-06-05 21:18:08,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:08,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326318643] [2021-06-05 21:18:08,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:08,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:08,845 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:08,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:08,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326318643] [2021-06-05 21:18:08,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326318643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:08,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050370047] [2021-06-05 21:18:08,845 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:08,867 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:18:08,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:08,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:18:08,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:08,921 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:08,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050370047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:08,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:08,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-06-05 21:18:08,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579879277] [2021-06-05 21:18:08,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:18:08,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:08,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:18:08,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:18:08,922 INFO L87 Difference]: Start difference. First operand 1484 states and 4267 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:09,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:09,172 INFO L93 Difference]: Finished difference Result 1883 states and 5198 transitions. [2021-06-05 21:18:09,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:18:09,172 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:18:09,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:09,174 INFO L225 Difference]: With dead ends: 1883 [2021-06-05 21:18:09,174 INFO L226 Difference]: Without dead ends: 1883 [2021-06-05 21:18:09,175 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 218.2ms TimeCoverageRelationStatistics Valid=331, Invalid=725, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:18:09,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1883 states. [2021-06-05 21:18:09,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1883 to 1685. [2021-06-05 21:18:09,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1685 states, 1684 states have (on average 2.8966745843230406) internal successors, (4878), 1684 states have internal predecessors, (4878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:09,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1685 states to 1685 states and 4878 transitions. [2021-06-05 21:18:09,207 INFO L78 Accepts]: Start accepts. Automaton has 1685 states and 4878 transitions. Word has length 19 [2021-06-05 21:18:09,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:09,207 INFO L482 AbstractCegarLoop]: Abstraction has 1685 states and 4878 transitions. [2021-06-05 21:18:09,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:09,208 INFO L276 IsEmpty]: Start isEmpty. Operand 1685 states and 4878 transitions. [2021-06-05 21:18:09,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:18:09,210 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:09,211 INFO L554 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:09,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable573 [2021-06-05 21:18:09,425 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:09,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:09,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1550714670, now seen corresponding path program 132 times [2021-06-05 21:18:09,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:09,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347314990] [2021-06-05 21:18:09,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:09,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:09,487 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:09,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:09,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347314990] [2021-06-05 21:18:09,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347314990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:09,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642986434] [2021-06-05 21:18:09,488 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:09,518 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:18:09,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:09,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:18:09,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:09,555 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:09,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642986434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:09,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:09,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 13 [2021-06-05 21:18:09,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204206436] [2021-06-05 21:18:09,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:18:09,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:09,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:18:09,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:18:09,555 INFO L87 Difference]: Start difference. First operand 1685 states and 4878 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:09,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:09,676 INFO L93 Difference]: Finished difference Result 1804 states and 5036 transitions. [2021-06-05 21:18:09,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:18:09,676 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:18:09,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:09,678 INFO L225 Difference]: With dead ends: 1804 [2021-06-05 21:18:09,679 INFO L226 Difference]: Without dead ends: 1802 [2021-06-05 21:18:09,679 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 110.0ms TimeCoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:18:09,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2021-06-05 21:18:09,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1697. [2021-06-05 21:18:09,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1697 states, 1696 states have (on average 2.8985849056603774) internal successors, (4916), 1696 states have internal predecessors, (4916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:09,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1697 states to 1697 states and 4916 transitions. [2021-06-05 21:18:09,696 INFO L78 Accepts]: Start accepts. Automaton has 1697 states and 4916 transitions. Word has length 19 [2021-06-05 21:18:09,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:09,696 INFO L482 AbstractCegarLoop]: Abstraction has 1697 states and 4916 transitions. [2021-06-05 21:18:09,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:09,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1697 states and 4916 transitions. [2021-06-05 21:18:09,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:18:09,699 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:09,699 INFO L554 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:09,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable574 [2021-06-05 21:18:09,922 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:09,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:09,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1026503566, now seen corresponding path program 133 times [2021-06-05 21:18:09,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:09,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537068780] [2021-06-05 21:18:09,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:09,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:09,983 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:09,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:09,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537068780] [2021-06-05 21:18:09,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537068780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:09,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966073291] [2021-06-05 21:18:09,983 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:10,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:10,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:18:10,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:10,050 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:10,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966073291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:10,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:10,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 13 [2021-06-05 21:18:10,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982420730] [2021-06-05 21:18:10,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:18:10,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:10,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:18:10,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:18:10,051 INFO L87 Difference]: Start difference. First operand 1697 states and 4916 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:10,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:10,170 INFO L93 Difference]: Finished difference Result 1866 states and 5178 transitions. [2021-06-05 21:18:10,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:18:10,170 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:18:10,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:10,172 INFO L225 Difference]: With dead ends: 1866 [2021-06-05 21:18:10,172 INFO L226 Difference]: Without dead ends: 1866 [2021-06-05 21:18:10,173 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 119.5ms TimeCoverageRelationStatistics Valid=170, Invalid=336, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:18:10,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1866 states. [2021-06-05 21:18:10,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1866 to 1698. [2021-06-05 21:18:10,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1698 states, 1697 states have (on average 2.897466116676488) internal successors, (4917), 1697 states have internal predecessors, (4917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:10,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1698 states to 1698 states and 4917 transitions. [2021-06-05 21:18:10,191 INFO L78 Accepts]: Start accepts. Automaton has 1698 states and 4917 transitions. Word has length 19 [2021-06-05 21:18:10,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:10,191 INFO L482 AbstractCegarLoop]: Abstraction has 1698 states and 4917 transitions. [2021-06-05 21:18:10,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:10,191 INFO L276 IsEmpty]: Start isEmpty. Operand 1698 states and 4917 transitions. [2021-06-05 21:18:10,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:18:10,193 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:10,193 INFO L554 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:10,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable575 [2021-06-05 21:18:10,409 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:10,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:10,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1539416396, now seen corresponding path program 134 times [2021-06-05 21:18:10,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:10,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991887838] [2021-06-05 21:18:10,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:10,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:10,473 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:10,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:10,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991887838] [2021-06-05 21:18:10,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991887838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:10,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276095884] [2021-06-05 21:18:10,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:10,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:18:10,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:10,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:18:10,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:10,541 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:10,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276095884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:10,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:10,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 14 [2021-06-05 21:18:10,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254440199] [2021-06-05 21:18:10,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:18:10,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:10,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:18:10,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:18:10,542 INFO L87 Difference]: Start difference. First operand 1698 states and 4917 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:10,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:10,701 INFO L93 Difference]: Finished difference Result 1913 states and 5283 transitions. [2021-06-05 21:18:10,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:18:10,701 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:18:10,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:10,703 INFO L225 Difference]: With dead ends: 1913 [2021-06-05 21:18:10,703 INFO L226 Difference]: Without dead ends: 1913 [2021-06-05 21:18:10,703 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 148.4ms TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:18:10,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2021-06-05 21:18:10,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1700. [2021-06-05 21:18:10,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1700 states, 1699 states have (on average 2.896409652736904) internal successors, (4921), 1699 states have internal predecessors, (4921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:10,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1700 states to 1700 states and 4921 transitions. [2021-06-05 21:18:10,719 INFO L78 Accepts]: Start accepts. Automaton has 1700 states and 4921 transitions. Word has length 19 [2021-06-05 21:18:10,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:10,719 INFO L482 AbstractCegarLoop]: Abstraction has 1700 states and 4921 transitions. [2021-06-05 21:18:10,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:10,719 INFO L276 IsEmpty]: Start isEmpty. Operand 1700 states and 4921 transitions. [2021-06-05 21:18:10,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:18:10,721 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:10,721 INFO L554 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:10,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable576 [2021-06-05 21:18:10,921 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:10,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:10,921 INFO L82 PathProgramCache]: Analyzing trace with hash -521443406, now seen corresponding path program 135 times [2021-06-05 21:18:10,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:10,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55023926] [2021-06-05 21:18:10,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:10,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:10,990 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:10,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:10,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55023926] [2021-06-05 21:18:10,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55023926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:10,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25369947] [2021-06-05 21:18:10,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:11,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:18:11,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:11,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:18:11,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:11,083 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:11,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25369947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:11,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:11,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 14 [2021-06-05 21:18:11,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635592589] [2021-06-05 21:18:11,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:18:11,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:11,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:18:11,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:18:11,084 INFO L87 Difference]: Start difference. First operand 1700 states and 4921 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:11,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:11,285 INFO L93 Difference]: Finished difference Result 2111 states and 5864 transitions. [2021-06-05 21:18:11,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:18:11,285 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:18:11,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:11,287 INFO L225 Difference]: With dead ends: 2111 [2021-06-05 21:18:11,287 INFO L226 Difference]: Without dead ends: 2111 [2021-06-05 21:18:11,288 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 194.8ms TimeCoverageRelationStatistics Valid=269, Invalid=601, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:18:11,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2111 states. [2021-06-05 21:18:11,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2111 to 1895. [2021-06-05 21:18:11,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1895 states, 1894 states have (on average 2.9123548046462515) internal successors, (5516), 1894 states have internal predecessors, (5516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:11,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1895 states to 1895 states and 5516 transitions. [2021-06-05 21:18:11,308 INFO L78 Accepts]: Start accepts. Automaton has 1895 states and 5516 transitions. Word has length 19 [2021-06-05 21:18:11,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:11,308 INFO L482 AbstractCegarLoop]: Abstraction has 1895 states and 5516 transitions. [2021-06-05 21:18:11,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:11,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1895 states and 5516 transitions. [2021-06-05 21:18:11,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:18:11,312 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:11,312 INFO L554 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:11,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable577,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:11,534 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:11,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:11,535 INFO L82 PathProgramCache]: Analyzing trace with hash 16412172, now seen corresponding path program 136 times [2021-06-05 21:18:11,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:11,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677336758] [2021-06-05 21:18:11,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:11,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:11,608 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:11,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:11,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677336758] [2021-06-05 21:18:11,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677336758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:11,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297263689] [2021-06-05 21:18:11,608 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:11,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:18:11,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:11,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:18:11,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:11,683 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:11,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297263689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:11,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:11,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 15 [2021-06-05 21:18:11,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418857057] [2021-06-05 21:18:11,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:18:11,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:11,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:18:11,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:18:11,684 INFO L87 Difference]: Start difference. First operand 1895 states and 5516 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:11,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:11,864 INFO L93 Difference]: Finished difference Result 2071 states and 5772 transitions. [2021-06-05 21:18:11,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:18:11,864 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:18:11,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:11,866 INFO L225 Difference]: With dead ends: 2071 [2021-06-05 21:18:11,866 INFO L226 Difference]: Without dead ends: 2071 [2021-06-05 21:18:11,867 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 188.6ms TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:18:11,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2021-06-05 21:18:11,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 1876. [2021-06-05 21:18:11,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1876 states, 1875 states have (on average 2.9082666666666666) internal successors, (5453), 1875 states have internal predecessors, (5453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:11,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 5453 transitions. [2021-06-05 21:18:11,900 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 5453 transitions. Word has length 19 [2021-06-05 21:18:11,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:11,900 INFO L482 AbstractCegarLoop]: Abstraction has 1876 states and 5453 transitions. [2021-06-05 21:18:11,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:11,901 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 5453 transitions. [2021-06-05 21:18:11,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:18:11,903 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:11,903 INFO L554 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:12,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable578 [2021-06-05 21:18:12,125 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:12,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:12,125 INFO L82 PathProgramCache]: Analyzing trace with hash -489934094, now seen corresponding path program 137 times [2021-06-05 21:18:12,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:12,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072056996] [2021-06-05 21:18:12,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:12,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:12,202 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:12,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:12,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072056996] [2021-06-05 21:18:12,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072056996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:12,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804876357] [2021-06-05 21:18:12,203 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:12,231 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:18:12,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:12,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:18:12,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:12,292 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:12,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804876357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:12,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:12,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 15 [2021-06-05 21:18:12,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9240399] [2021-06-05 21:18:12,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:18:12,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:12,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:18:12,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:18:12,293 INFO L87 Difference]: Start difference. First operand 1876 states and 5453 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:12,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:12,458 INFO L93 Difference]: Finished difference Result 2136 states and 6078 transitions. [2021-06-05 21:18:12,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:18:12,459 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:18:12,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:12,461 INFO L225 Difference]: With dead ends: 2136 [2021-06-05 21:18:12,461 INFO L226 Difference]: Without dead ends: 2136 [2021-06-05 21:18:12,461 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 192.2ms TimeCoverageRelationStatistics Valid=241, Invalid=571, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:18:12,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2136 states. [2021-06-05 21:18:12,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2136 to 2034. [2021-06-05 21:18:12,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2034 states, 2033 states have (on average 2.9188391539596656) internal successors, (5934), 2033 states have internal predecessors, (5934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:12,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2034 states to 2034 states and 5934 transitions. [2021-06-05 21:18:12,483 INFO L78 Accepts]: Start accepts. Automaton has 2034 states and 5934 transitions. Word has length 19 [2021-06-05 21:18:12,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:12,483 INFO L482 AbstractCegarLoop]: Abstraction has 2034 states and 5934 transitions. [2021-06-05 21:18:12,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:12,483 INFO L276 IsEmpty]: Start isEmpty. Operand 2034 states and 5934 transitions. [2021-06-05 21:18:12,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:18:12,485 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:12,485 INFO L554 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:12,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable579 [2021-06-05 21:18:12,685 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:12,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:12,686 INFO L82 PathProgramCache]: Analyzing trace with hash 993200844, now seen corresponding path program 138 times [2021-06-05 21:18:12,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:12,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411834072] [2021-06-05 21:18:12,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:12,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:12,750 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:12,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:12,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411834072] [2021-06-05 21:18:12,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411834072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:12,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790461171] [2021-06-05 21:18:12,751 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:12,773 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:18:12,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:12,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:18:12,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:12,843 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:12,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790461171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:12,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:12,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 21:18:12,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844944417] [2021-06-05 21:18:12,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:18:12,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:12,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:18:12,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:18:12,844 INFO L87 Difference]: Start difference. First operand 2034 states and 5934 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:13,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:13,023 INFO L93 Difference]: Finished difference Result 2171 states and 6166 transitions. [2021-06-05 21:18:13,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:18:13,024 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:18:13,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:13,025 INFO L225 Difference]: With dead ends: 2171 [2021-06-05 21:18:13,026 INFO L226 Difference]: Without dead ends: 2171 [2021-06-05 21:18:13,026 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 196.6ms TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:18:13,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2021-06-05 21:18:13,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 2028. [2021-06-05 21:18:13,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 2.9181055747409967) internal successors, (5915), 2027 states have internal predecessors, (5915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:13,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 5915 transitions. [2021-06-05 21:18:13,045 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 5915 transitions. Word has length 19 [2021-06-05 21:18:13,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:13,045 INFO L482 AbstractCegarLoop]: Abstraction has 2028 states and 5915 transitions. [2021-06-05 21:18:13,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:13,045 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 5915 transitions. [2021-06-05 21:18:13,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:18:13,047 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:13,047 INFO L554 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:13,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:13,247 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:13,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:13,247 INFO L82 PathProgramCache]: Analyzing trace with hash -274256334, now seen corresponding path program 139 times [2021-06-05 21:18:13,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:13,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561436675] [2021-06-05 21:18:13,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:13,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:13,337 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:13,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:13,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561436675] [2021-06-05 21:18:13,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561436675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:13,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196717357] [2021-06-05 21:18:13,337 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:13,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:13,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:18:13,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:13,424 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:13,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196717357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:13,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:13,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 21:18:13,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228493657] [2021-06-05 21:18:13,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:18:13,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:13,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:18:13,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:18:13,425 INFO L87 Difference]: Start difference. First operand 2028 states and 5915 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:13,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:13,712 INFO L93 Difference]: Finished difference Result 2447 states and 6973 transitions. [2021-06-05 21:18:13,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 21:18:13,712 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 21:18:13,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:13,714 INFO L225 Difference]: With dead ends: 2447 [2021-06-05 21:18:13,714 INFO L226 Difference]: Without dead ends: 2447 [2021-06-05 21:18:13,714 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 297.7ms TimeCoverageRelationStatistics Valid=495, Invalid=1145, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 21:18:13,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2021-06-05 21:18:13,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 2072. [2021-06-05 21:18:13,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 2071 states have (on average 2.920328343795268) internal successors, (6048), 2071 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:13,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 6048 transitions. [2021-06-05 21:18:13,735 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 6048 transitions. Word has length 19 [2021-06-05 21:18:13,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:13,735 INFO L482 AbstractCegarLoop]: Abstraction has 2072 states and 6048 transitions. [2021-06-05 21:18:13,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:13,735 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 6048 transitions. [2021-06-05 21:18:13,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:18:13,736 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:13,736 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:13,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:13,937 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:13,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:13,937 INFO L82 PathProgramCache]: Analyzing trace with hash 935559555, now seen corresponding path program 140 times [2021-06-05 21:18:13,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:13,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158152376] [2021-06-05 21:18:13,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:13,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:13,984 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:13,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:13,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158152376] [2021-06-05 21:18:13,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158152376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:13,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282960759] [2021-06-05 21:18:13,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:14,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:18:14,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:14,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:18:14,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:14,036 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:18:14,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282960759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:14,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:14,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 11 [2021-06-05 21:18:14,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566552426] [2021-06-05 21:18:14,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:18:14,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:14,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:18:14,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:18:14,036 INFO L87 Difference]: Start difference. First operand 2072 states and 6048 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:14,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:14,182 INFO L93 Difference]: Finished difference Result 2203 states and 6267 transitions. [2021-06-05 21:18:14,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:18:14,182 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:18:14,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:14,184 INFO L225 Difference]: With dead ends: 2203 [2021-06-05 21:18:14,184 INFO L226 Difference]: Without dead ends: 2199 [2021-06-05 21:18:14,185 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 107.0ms TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:18:14,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-06-05 21:18:14,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 2069. [2021-06-05 21:18:14,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2069 states, 2068 states have (on average 2.9192456479690523) internal successors, (6037), 2068 states have internal predecessors, (6037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:14,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2069 states to 2069 states and 6037 transitions. [2021-06-05 21:18:14,204 INFO L78 Accepts]: Start accepts. Automaton has 2069 states and 6037 transitions. Word has length 20 [2021-06-05 21:18:14,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:14,204 INFO L482 AbstractCegarLoop]: Abstraction has 2069 states and 6037 transitions. [2021-06-05 21:18:14,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:14,204 INFO L276 IsEmpty]: Start isEmpty. Operand 2069 states and 6037 transitions. [2021-06-05 21:18:14,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:18:14,205 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:14,205 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:14,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable582,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:14,406 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:14,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:14,406 INFO L82 PathProgramCache]: Analyzing trace with hash -221292409, now seen corresponding path program 141 times [2021-06-05 21:18:14,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:14,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040267982] [2021-06-05 21:18:14,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:14,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:14,447 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:14,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:14,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040267982] [2021-06-05 21:18:14,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040267982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:14,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765490279] [2021-06-05 21:18:14,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:14,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:18:14,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:14,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:18:14,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:14,518 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:18:14,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765490279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:14,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:14,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:18:14,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544666433] [2021-06-05 21:18:14,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:18:14,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:14,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:18:14,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:18:14,519 INFO L87 Difference]: Start difference. First operand 2069 states and 6037 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:14,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:14,583 INFO L93 Difference]: Finished difference Result 2256 states and 6332 transitions. [2021-06-05 21:18:14,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:18:14,584 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:18:14,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:14,586 INFO L225 Difference]: With dead ends: 2256 [2021-06-05 21:18:14,586 INFO L226 Difference]: Without dead ends: 2254 [2021-06-05 21:18:14,586 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 61.6ms TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:18:14,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2254 states. [2021-06-05 21:18:14,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2254 to 2079. [2021-06-05 21:18:14,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2079 states, 2078 states have (on average 2.9181905678537055) internal successors, (6064), 2078 states have internal predecessors, (6064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:14,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2079 states to 2079 states and 6064 transitions. [2021-06-05 21:18:14,607 INFO L78 Accepts]: Start accepts. Automaton has 2079 states and 6064 transitions. Word has length 20 [2021-06-05 21:18:14,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:14,607 INFO L482 AbstractCegarLoop]: Abstraction has 2079 states and 6064 transitions. [2021-06-05 21:18:14,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:14,607 INFO L276 IsEmpty]: Start isEmpty. Operand 2079 states and 6064 transitions. [2021-06-05 21:18:14,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:18:14,609 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:14,609 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:14,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable583 [2021-06-05 21:18:14,809 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:14,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:14,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1524162281, now seen corresponding path program 142 times [2021-06-05 21:18:14,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:14,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841885979] [2021-06-05 21:18:14,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:14,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:14,849 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:14,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:14,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841885979] [2021-06-05 21:18:14,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841885979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:14,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310763648] [2021-06-05 21:18:14,849 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:14,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:18:14,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:14,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:18:14,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:14,925 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:18:14,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310763648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:14,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:14,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-05 21:18:14,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035043852] [2021-06-05 21:18:14,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:18:14,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:14,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:18:14,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:18:14,926 INFO L87 Difference]: Start difference. First operand 2079 states and 6064 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:15,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:15,035 INFO L93 Difference]: Finished difference Result 2285 states and 6387 transitions. [2021-06-05 21:18:15,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:18:15,035 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:18:15,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:15,038 INFO L225 Difference]: With dead ends: 2285 [2021-06-05 21:18:15,038 INFO L226 Difference]: Without dead ends: 2284 [2021-06-05 21:18:15,039 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 76.0ms TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:18:15,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2284 states. [2021-06-05 21:18:15,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2284 to 2072. [2021-06-05 21:18:15,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 2071 states have (on average 2.91405118300338) internal successors, (6035), 2071 states have internal predecessors, (6035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:15,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 6035 transitions. [2021-06-05 21:18:15,068 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 6035 transitions. Word has length 20 [2021-06-05 21:18:15,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:15,068 INFO L482 AbstractCegarLoop]: Abstraction has 2072 states and 6035 transitions. [2021-06-05 21:18:15,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:15,068 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 6035 transitions. [2021-06-05 21:18:15,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:18:15,070 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:15,070 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:15,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable584 [2021-06-05 21:18:15,271 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:15,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:15,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1060191707, now seen corresponding path program 143 times [2021-06-05 21:18:15,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:15,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368570611] [2021-06-05 21:18:15,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:15,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:15,323 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:15,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:15,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368570611] [2021-06-05 21:18:15,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368570611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:15,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057319435] [2021-06-05 21:18:15,324 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:15,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:18:15,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:15,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:18:15,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:15,401 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:15,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057319435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:15,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:15,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:18:15,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939328800] [2021-06-05 21:18:15,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:18:15,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:15,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:18:15,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:18:15,402 INFO L87 Difference]: Start difference. First operand 2072 states and 6035 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:15,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:15,548 INFO L93 Difference]: Finished difference Result 2223 states and 6241 transitions. [2021-06-05 21:18:15,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:18:15,549 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:18:15,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:15,552 INFO L225 Difference]: With dead ends: 2223 [2021-06-05 21:18:15,552 INFO L226 Difference]: Without dead ends: 2220 [2021-06-05 21:18:15,552 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 98.8ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:18:15,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2220 states. [2021-06-05 21:18:15,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2220 to 2065. [2021-06-05 21:18:15,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2065 states, 2064 states have (on average 2.9084302325581395) internal successors, (6003), 2064 states have internal predecessors, (6003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:15,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 6003 transitions. [2021-06-05 21:18:15,582 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 6003 transitions. Word has length 20 [2021-06-05 21:18:15,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:15,582 INFO L482 AbstractCegarLoop]: Abstraction has 2065 states and 6003 transitions. [2021-06-05 21:18:15,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:15,582 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 6003 transitions. [2021-06-05 21:18:15,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:18:15,584 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:15,584 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:15,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable585 [2021-06-05 21:18:15,807 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:15,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:15,807 INFO L82 PathProgramCache]: Analyzing trace with hash 429213289, now seen corresponding path program 144 times [2021-06-05 21:18:15,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:15,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396454157] [2021-06-05 21:18:15,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:15,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:15,859 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:15,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:15,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396454157] [2021-06-05 21:18:15,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396454157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:15,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698021786] [2021-06-05 21:18:15,859 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:15,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:18:15,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:15,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:18:15,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:15,933 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:15,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698021786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:15,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:15,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:18:15,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520588656] [2021-06-05 21:18:15,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:18:15,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:15,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:18:15,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:18:15,934 INFO L87 Difference]: Start difference. First operand 2065 states and 6003 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:16,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:16,081 INFO L93 Difference]: Finished difference Result 2220 states and 6216 transitions. [2021-06-05 21:18:16,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:18:16,081 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:18:16,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:16,083 INFO L225 Difference]: With dead ends: 2220 [2021-06-05 21:18:16,084 INFO L226 Difference]: Without dead ends: 2216 [2021-06-05 21:18:16,084 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 101.8ms TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:18:16,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2216 states. [2021-06-05 21:18:16,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2216 to 2065. [2021-06-05 21:18:16,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2065 states, 2064 states have (on average 2.9040697674418605) internal successors, (5994), 2064 states have internal predecessors, (5994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:16,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 5994 transitions. [2021-06-05 21:18:16,105 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 5994 transitions. Word has length 20 [2021-06-05 21:18:16,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:16,106 INFO L482 AbstractCegarLoop]: Abstraction has 2065 states and 5994 transitions. [2021-06-05 21:18:16,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:16,106 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 5994 transitions. [2021-06-05 21:18:16,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:18:16,107 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:16,107 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:16,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable586 [2021-06-05 21:18:16,308 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:16,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:16,308 INFO L82 PathProgramCache]: Analyzing trace with hash -643872091, now seen corresponding path program 145 times [2021-06-05 21:18:16,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:16,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997066755] [2021-06-05 21:18:16,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:16,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:16,365 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:16,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:16,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997066755] [2021-06-05 21:18:16,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997066755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:16,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697619026] [2021-06-05 21:18:16,366 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:16,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:16,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:18:16,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:16,417 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:16,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697619026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:16,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:16,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 12 [2021-06-05 21:18:16,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140700706] [2021-06-05 21:18:16,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:18:16,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:16,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:18:16,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:18:16,418 INFO L87 Difference]: Start difference. First operand 2065 states and 5994 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:16,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:16,539 INFO L93 Difference]: Finished difference Result 2259 states and 6407 transitions. [2021-06-05 21:18:16,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:18:16,539 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:18:16,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:16,541 INFO L225 Difference]: With dead ends: 2259 [2021-06-05 21:18:16,541 INFO L226 Difference]: Without dead ends: 2253 [2021-06-05 21:18:16,542 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:18:16,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2253 states. [2021-06-05 21:18:16,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2253 to 2076. [2021-06-05 21:18:16,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2076 states, 2075 states have (on average 2.9016867469879517) internal successors, (6021), 2075 states have internal predecessors, (6021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:16,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 6021 transitions. [2021-06-05 21:18:16,562 INFO L78 Accepts]: Start accepts. Automaton has 2076 states and 6021 transitions. Word has length 20 [2021-06-05 21:18:16,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:16,562 INFO L482 AbstractCegarLoop]: Abstraction has 2076 states and 6021 transitions. [2021-06-05 21:18:16,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:16,562 INFO L276 IsEmpty]: Start isEmpty. Operand 2076 states and 6021 transitions. [2021-06-05 21:18:16,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:18:16,564 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:16,564 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:16,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable587 [2021-06-05 21:18:16,764 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:16,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:16,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1340924973, now seen corresponding path program 146 times [2021-06-05 21:18:16,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:16,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695555945] [2021-06-05 21:18:16,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:16,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:16,826 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:16,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:16,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695555945] [2021-06-05 21:18:16,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695555945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:16,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211395883] [2021-06-05 21:18:16,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:16,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:18:16,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:16,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:18:16,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:16,876 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:16,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211395883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:16,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:16,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 12 [2021-06-05 21:18:16,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334924298] [2021-06-05 21:18:16,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:18:16,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:16,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:18:16,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:18:16,877 INFO L87 Difference]: Start difference. First operand 2076 states and 6021 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:17,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:17,019 INFO L93 Difference]: Finished difference Result 2223 states and 6260 transitions. [2021-06-05 21:18:17,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:18:17,019 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:18:17,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:17,021 INFO L225 Difference]: With dead ends: 2223 [2021-06-05 21:18:17,021 INFO L226 Difference]: Without dead ends: 2214 [2021-06-05 21:18:17,021 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 103.4ms TimeCoverageRelationStatistics Valid=151, Invalid=311, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:18:17,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2214 states. [2021-06-05 21:18:17,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2214 to 2064. [2021-06-05 21:18:17,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2064 states, 2063 states have (on average 2.9015996122152203) internal successors, (5986), 2063 states have internal predecessors, (5986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:17,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 5986 transitions. [2021-06-05 21:18:17,043 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 5986 transitions. Word has length 20 [2021-06-05 21:18:17,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:17,043 INFO L482 AbstractCegarLoop]: Abstraction has 2064 states and 5986 transitions. [2021-06-05 21:18:17,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:17,043 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 5986 transitions. [2021-06-05 21:18:17,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:18:17,056 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:17,056 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:17,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable588,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:17,257 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:17,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:17,257 INFO L82 PathProgramCache]: Analyzing trace with hash 564789647, now seen corresponding path program 147 times [2021-06-05 21:18:17,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:17,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805706487] [2021-06-05 21:18:17,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:17,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:17,299 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:17,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:17,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805706487] [2021-06-05 21:18:17,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805706487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:17,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248865520] [2021-06-05 21:18:17,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:17,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:18:17,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:17,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:18:17,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:17,365 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:18:17,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248865520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:17,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:17,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:18:17,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173866125] [2021-06-05 21:18:17,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:18:17,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:17,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:18:17,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:18:17,366 INFO L87 Difference]: Start difference. First operand 2064 states and 5986 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:17,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:17,425 INFO L93 Difference]: Finished difference Result 2236 states and 6252 transitions. [2021-06-05 21:18:17,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:18:17,425 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:18:17,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:17,427 INFO L225 Difference]: With dead ends: 2236 [2021-06-05 21:18:17,427 INFO L226 Difference]: Without dead ends: 2236 [2021-06-05 21:18:17,427 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 46.7ms TimeCoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:18:17,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2236 states. [2021-06-05 21:18:17,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2236 to 2065. [2021-06-05 21:18:17,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2065 states, 2064 states have (on average 2.9001937984496124) internal successors, (5986), 2064 states have internal predecessors, (5986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:17,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 5986 transitions. [2021-06-05 21:18:17,449 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 5986 transitions. Word has length 20 [2021-06-05 21:18:17,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:17,449 INFO L482 AbstractCegarLoop]: Abstraction has 2065 states and 5986 transitions. [2021-06-05 21:18:17,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:17,449 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 5986 transitions. [2021-06-05 21:18:17,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:18:17,451 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:17,451 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:17,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable589 [2021-06-05 21:18:17,652 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:17,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:17,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1984722959, now seen corresponding path program 148 times [2021-06-05 21:18:17,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:17,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620717382] [2021-06-05 21:18:17,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:17,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:17,698 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:17,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:17,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620717382] [2021-06-05 21:18:17,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620717382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:17,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609865594] [2021-06-05 21:18:17,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:17,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:18:17,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:17,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:18:17,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:17,765 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:18:17,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609865594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:17,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:17,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-05 21:18:17,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413370836] [2021-06-05 21:18:17,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:18:17,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:17,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:18:17,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:18:17,766 INFO L87 Difference]: Start difference. First operand 2065 states and 5986 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:17,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:17,841 INFO L93 Difference]: Finished difference Result 2263 states and 6281 transitions. [2021-06-05 21:18:17,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:18:17,842 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:18:17,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:17,844 INFO L225 Difference]: With dead ends: 2263 [2021-06-05 21:18:17,844 INFO L226 Difference]: Without dead ends: 2262 [2021-06-05 21:18:17,844 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 61.9ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:18:17,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2021-06-05 21:18:17,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 2069. [2021-06-05 21:18:17,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2069 states, 2068 states have (on average 2.897001934235977) internal successors, (5991), 2068 states have internal predecessors, (5991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:17,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2069 states to 2069 states and 5991 transitions. [2021-06-05 21:18:17,867 INFO L78 Accepts]: Start accepts. Automaton has 2069 states and 5991 transitions. Word has length 20 [2021-06-05 21:18:17,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:17,867 INFO L482 AbstractCegarLoop]: Abstraction has 2069 states and 5991 transitions. [2021-06-05 21:18:17,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:17,867 INFO L276 IsEmpty]: Start isEmpty. Operand 2069 states and 5991 transitions. [2021-06-05 21:18:17,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:18:17,869 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:17,869 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:18,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable590 [2021-06-05 21:18:18,071 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:18,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:18,071 INFO L82 PathProgramCache]: Analyzing trace with hash -274109651, now seen corresponding path program 149 times [2021-06-05 21:18:18,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:18,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704028784] [2021-06-05 21:18:18,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:18,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:18,114 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:18,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:18,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704028784] [2021-06-05 21:18:18,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704028784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:18,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732304054] [2021-06-05 21:18:18,115 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:18,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:18:18,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:18,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:18:18,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:18,167 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:18,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732304054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:18,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:18,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 11 [2021-06-05 21:18:18,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074747671] [2021-06-05 21:18:18,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:18:18,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:18,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:18:18,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:18:18,168 INFO L87 Difference]: Start difference. First operand 2069 states and 5991 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:18,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:18,284 INFO L93 Difference]: Finished difference Result 2229 states and 6208 transitions. [2021-06-05 21:18:18,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:18:18,285 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:18:18,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:18,287 INFO L225 Difference]: With dead ends: 2229 [2021-06-05 21:18:18,287 INFO L226 Difference]: Without dead ends: 2225 [2021-06-05 21:18:18,287 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 80.0ms TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:18:18,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2021-06-05 21:18:18,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 2054. [2021-06-05 21:18:18,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2054 states, 2053 states have (on average 2.8913784705309302) internal successors, (5936), 2053 states have internal predecessors, (5936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:18,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2054 states to 2054 states and 5936 transitions. [2021-06-05 21:18:18,308 INFO L78 Accepts]: Start accepts. Automaton has 2054 states and 5936 transitions. Word has length 20 [2021-06-05 21:18:18,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:18,308 INFO L482 AbstractCegarLoop]: Abstraction has 2054 states and 5936 transitions. [2021-06-05 21:18:18,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:18,308 INFO L276 IsEmpty]: Start isEmpty. Operand 2054 states and 5936 transitions. [2021-06-05 21:18:18,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:18:18,310 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:18,310 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:18,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:18,525 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:18,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:18,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1215295345, now seen corresponding path program 150 times [2021-06-05 21:18:18,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:18,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898705841] [2021-06-05 21:18:18,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:18,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:18,581 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:18,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:18,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898705841] [2021-06-05 21:18:18,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898705841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:18,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042134647] [2021-06-05 21:18:18,581 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:18,606 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:18:18,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:18,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:18:18,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:18,643 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:18,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042134647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:18,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:18,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 21:18:18,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855729686] [2021-06-05 21:18:18,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:18:18,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:18,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:18:18,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:18:18,644 INFO L87 Difference]: Start difference. First operand 2054 states and 5936 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:18,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:18,778 INFO L93 Difference]: Finished difference Result 2217 states and 6160 transitions. [2021-06-05 21:18:18,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:18:18,779 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:18:18,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:18,781 INFO L225 Difference]: With dead ends: 2217 [2021-06-05 21:18:18,782 INFO L226 Difference]: Without dead ends: 2211 [2021-06-05 21:18:18,782 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 105.6ms TimeCoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:18:18,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2211 states. [2021-06-05 21:18:18,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2211 to 2046. [2021-06-05 21:18:18,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2046 states, 2045 states have (on average 2.8880195599022005) internal successors, (5906), 2045 states have internal predecessors, (5906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:18,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2046 states to 2046 states and 5906 transitions. [2021-06-05 21:18:18,805 INFO L78 Accepts]: Start accepts. Automaton has 2046 states and 5906 transitions. Word has length 20 [2021-06-05 21:18:18,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:18,805 INFO L482 AbstractCegarLoop]: Abstraction has 2046 states and 5906 transitions. [2021-06-05 21:18:18,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:18,805 INFO L276 IsEmpty]: Start isEmpty. Operand 2046 states and 5906 transitions. [2021-06-05 21:18:18,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:18:18,807 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:18,807 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:19,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:19,007 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:19,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:19,007 INFO L82 PathProgramCache]: Analyzing trace with hash 142209965, now seen corresponding path program 151 times [2021-06-05 21:18:19,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:19,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389785177] [2021-06-05 21:18:19,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:19,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:19,061 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:19,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:19,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389785177] [2021-06-05 21:18:19,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389785177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:19,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879290315] [2021-06-05 21:18:19,061 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:19,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:19,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:18:19,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:19,117 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:19,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879290315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:19,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:19,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-06-05 21:18:19,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118847637] [2021-06-05 21:18:19,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:18:19,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:19,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:18:19,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:18:19,118 INFO L87 Difference]: Start difference. First operand 2046 states and 5906 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:19,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:19,273 INFO L93 Difference]: Finished difference Result 2213 states and 6136 transitions. [2021-06-05 21:18:19,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:18:19,274 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:18:19,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:19,276 INFO L225 Difference]: With dead ends: 2213 [2021-06-05 21:18:19,276 INFO L226 Difference]: Without dead ends: 2207 [2021-06-05 21:18:19,276 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 122.7ms TimeCoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:18:19,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2207 states. [2021-06-05 21:18:19,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2207 to 2047. [2021-06-05 21:18:19,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2047 states, 2046 states have (on average 2.8836754643206257) internal successors, (5900), 2046 states have internal predecessors, (5900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:19,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2047 states to 2047 states and 5900 transitions. [2021-06-05 21:18:19,296 INFO L78 Accepts]: Start accepts. Automaton has 2047 states and 5900 transitions. Word has length 20 [2021-06-05 21:18:19,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:19,296 INFO L482 AbstractCegarLoop]: Abstraction has 2047 states and 5900 transitions. [2021-06-05 21:18:19,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:19,296 INFO L276 IsEmpty]: Start isEmpty. Operand 2047 states and 5900 transitions. [2021-06-05 21:18:19,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:18:19,298 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:19,298 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:19,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable593,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:19,499 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:19,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:19,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1236301553, now seen corresponding path program 152 times [2021-06-05 21:18:19,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:19,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698435881] [2021-06-05 21:18:19,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:19,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:19,554 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:19,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:19,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698435881] [2021-06-05 21:18:19,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698435881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:19,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036533985] [2021-06-05 21:18:19,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:19,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:18:19,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:19,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:18:19,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:19,613 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:19,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036533985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:19,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:19,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-06-05 21:18:19,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020259555] [2021-06-05 21:18:19,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:18:19,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:19,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:18:19,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:18:19,614 INFO L87 Difference]: Start difference. First operand 2047 states and 5900 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:19,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:19,780 INFO L93 Difference]: Finished difference Result 2421 states and 6711 transitions. [2021-06-05 21:18:19,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:18:19,780 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:18:19,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:19,783 INFO L225 Difference]: With dead ends: 2421 [2021-06-05 21:18:19,783 INFO L226 Difference]: Without dead ends: 2413 [2021-06-05 21:18:19,783 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 132.7ms TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:18:19,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2413 states. [2021-06-05 21:18:19,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2413 to 2084. [2021-06-05 21:18:19,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2084 states, 2083 states have (on average 2.884301488238118) internal successors, (6008), 2083 states have internal predecessors, (6008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:19,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2084 states to 2084 states and 6008 transitions. [2021-06-05 21:18:19,806 INFO L78 Accepts]: Start accepts. Automaton has 2084 states and 6008 transitions. Word has length 20 [2021-06-05 21:18:19,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:19,806 INFO L482 AbstractCegarLoop]: Abstraction has 2084 states and 6008 transitions. [2021-06-05 21:18:19,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:19,806 INFO L276 IsEmpty]: Start isEmpty. Operand 2084 states and 6008 transitions. [2021-06-05 21:18:19,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:18:19,808 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:19,808 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:20,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable594,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:20,009 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:20,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:20,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1102498691, now seen corresponding path program 153 times [2021-06-05 21:18:20,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:20,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236373724] [2021-06-05 21:18:20,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:20,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:20,089 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:20,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:20,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236373724] [2021-06-05 21:18:20,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236373724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:20,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514519513] [2021-06-05 21:18:20,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:20,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:18:20,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:20,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:18:20,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:20,142 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:20,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514519513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:20,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:20,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:18:20,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531394703] [2021-06-05 21:18:20,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:18:20,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:20,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:18:20,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:18:20,143 INFO L87 Difference]: Start difference. First operand 2084 states and 6008 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:20,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:20,304 INFO L93 Difference]: Finished difference Result 2248 states and 6298 transitions. [2021-06-05 21:18:20,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:18:20,304 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:18:20,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:20,306 INFO L225 Difference]: With dead ends: 2248 [2021-06-05 21:18:20,306 INFO L226 Difference]: Without dead ends: 2240 [2021-06-05 21:18:20,307 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 135.3ms TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:18:20,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2240 states. [2021-06-05 21:18:20,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2240 to 2079. [2021-06-05 21:18:20,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2079 states, 2078 states have (on average 2.8816169393647737) internal successors, (5988), 2078 states have internal predecessors, (5988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:20,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2079 states to 2079 states and 5988 transitions. [2021-06-05 21:18:20,326 INFO L78 Accepts]: Start accepts. Automaton has 2079 states and 5988 transitions. Word has length 20 [2021-06-05 21:18:20,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:20,326 INFO L482 AbstractCegarLoop]: Abstraction has 2079 states and 5988 transitions. [2021-06-05 21:18:20,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:20,326 INFO L276 IsEmpty]: Start isEmpty. Operand 2079 states and 5988 transitions. [2021-06-05 21:18:20,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:18:20,327 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:20,327 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:20,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable595 [2021-06-05 21:18:20,528 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:20,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:20,528 INFO L82 PathProgramCache]: Analyzing trace with hash -836470393, now seen corresponding path program 154 times [2021-06-05 21:18:20,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:20,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587328942] [2021-06-05 21:18:20,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:20,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:20,568 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:20,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:20,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587328942] [2021-06-05 21:18:20,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587328942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:20,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102125440] [2021-06-05 21:18:20,569 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:20,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:18:20,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:20,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:18:20,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:20,624 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:18:20,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102125440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:20,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:20,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 21:18:20,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809341532] [2021-06-05 21:18:20,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:18:20,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:20,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:18:20,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:18:20,625 INFO L87 Difference]: Start difference. First operand 2079 states and 5988 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:20,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:20,669 INFO L93 Difference]: Finished difference Result 2261 states and 6260 transitions. [2021-06-05 21:18:20,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:18:20,670 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:18:20,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:20,672 INFO L225 Difference]: With dead ends: 2261 [2021-06-05 21:18:20,672 INFO L226 Difference]: Without dead ends: 2259 [2021-06-05 21:18:20,672 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 39.8ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:18:20,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2259 states. [2021-06-05 21:18:20,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2259 to 2075. [2021-06-05 21:18:20,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2075 states, 2074 states have (on average 2.880424300867888) internal successors, (5974), 2074 states have internal predecessors, (5974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:20,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2075 states to 2075 states and 5974 transitions. [2021-06-05 21:18:20,696 INFO L78 Accepts]: Start accepts. Automaton has 2075 states and 5974 transitions. Word has length 20 [2021-06-05 21:18:20,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:20,696 INFO L482 AbstractCegarLoop]: Abstraction has 2075 states and 5974 transitions. [2021-06-05 21:18:20,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:20,697 INFO L276 IsEmpty]: Start isEmpty. Operand 2075 states and 5974 transitions. [2021-06-05 21:18:20,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:18:20,698 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:20,698 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:20,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable596,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:20,899 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:20,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:20,899 INFO L82 PathProgramCache]: Analyzing trace with hash 908984297, now seen corresponding path program 155 times [2021-06-05 21:18:20,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:20,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895874629] [2021-06-05 21:18:20,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:20,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:20,938 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:20,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:20,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895874629] [2021-06-05 21:18:20,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895874629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:20,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108540622] [2021-06-05 21:18:20,938 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:20,974 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:18:20,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:20,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:18:20,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:21,007 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:18:21,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108540622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:21,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:21,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-05 21:18:21,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680522550] [2021-06-05 21:18:21,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:18:21,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:21,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:18:21,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:18:21,008 INFO L87 Difference]: Start difference. First operand 2075 states and 5974 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:21,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:21,070 INFO L93 Difference]: Finished difference Result 2242 states and 6197 transitions. [2021-06-05 21:18:21,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:18:21,071 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:18:21,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:21,073 INFO L225 Difference]: With dead ends: 2242 [2021-06-05 21:18:21,073 INFO L226 Difference]: Without dead ends: 2242 [2021-06-05 21:18:21,073 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 46.1ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:18:21,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2021-06-05 21:18:21,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 2065. [2021-06-05 21:18:21,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2065 states, 2064 states have (on average 2.874515503875969) internal successors, (5933), 2064 states have internal predecessors, (5933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:21,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 5933 transitions. [2021-06-05 21:18:21,094 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 5933 transitions. Word has length 20 [2021-06-05 21:18:21,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:21,094 INFO L482 AbstractCegarLoop]: Abstraction has 2065 states and 5933 transitions. [2021-06-05 21:18:21,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:21,094 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 5933 transitions. [2021-06-05 21:18:21,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:18:21,096 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:21,096 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:21,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable597 [2021-06-05 21:18:21,297 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:21,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:21,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1675369691, now seen corresponding path program 156 times [2021-06-05 21:18:21,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:21,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742949674] [2021-06-05 21:18:21,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:21,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:21,342 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:21,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:21,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742949674] [2021-06-05 21:18:21,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742949674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:21,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803823200] [2021-06-05 21:18:21,342 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:21,365 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:18:21,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:21,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:18:21,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:21,403 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:21,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803823200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:21,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:21,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:18:21,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006582872] [2021-06-05 21:18:21,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:18:21,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:21,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:18:21,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:18:21,404 INFO L87 Difference]: Start difference. First operand 2065 states and 5933 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:21,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:21,523 INFO L93 Difference]: Finished difference Result 2234 states and 6164 transitions. [2021-06-05 21:18:21,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:18:21,524 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:18:21,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:21,526 INFO L225 Difference]: With dead ends: 2234 [2021-06-05 21:18:21,526 INFO L226 Difference]: Without dead ends: 2231 [2021-06-05 21:18:21,526 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 78.8ms TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:18:21,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2231 states. [2021-06-05 21:18:21,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2231 to 2055. [2021-06-05 21:18:21,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 2.8690360272638755) internal successors, (5893), 2054 states have internal predecessors, (5893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:21,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 5893 transitions. [2021-06-05 21:18:21,546 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 5893 transitions. Word has length 20 [2021-06-05 21:18:21,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:21,546 INFO L482 AbstractCegarLoop]: Abstraction has 2055 states and 5893 transitions. [2021-06-05 21:18:21,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:21,546 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 5893 transitions. [2021-06-05 21:18:21,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:18:21,547 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:21,547 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:21,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-06-05 21:18:21,748 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:21,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:21,748 INFO L82 PathProgramCache]: Analyzing trace with hash -185964695, now seen corresponding path program 157 times [2021-06-05 21:18:21,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:21,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143054634] [2021-06-05 21:18:21,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:21,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:21,800 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:21,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:21,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143054634] [2021-06-05 21:18:21,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143054634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:21,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86456672] [2021-06-05 21:18:21,801 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:21,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:21,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:18:21,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:21,851 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:21,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86456672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:21,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:21,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 12 [2021-06-05 21:18:21,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375732897] [2021-06-05 21:18:21,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:18:21,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:21,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:18:21,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:18:21,852 INFO L87 Difference]: Start difference. First operand 2055 states and 5893 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:21,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:21,975 INFO L93 Difference]: Finished difference Result 2228 states and 6131 transitions. [2021-06-05 21:18:21,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:18:21,976 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:18:21,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:21,978 INFO L225 Difference]: With dead ends: 2228 [2021-06-05 21:18:21,978 INFO L226 Difference]: Without dead ends: 2224 [2021-06-05 21:18:21,978 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 91.4ms TimeCoverageRelationStatistics Valid=140, Invalid=280, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:18:21,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2224 states. [2021-06-05 21:18:21,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2224 to 2055. [2021-06-05 21:18:21,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 2.862706913339825) internal successors, (5880), 2054 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:21,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 5880 transitions. [2021-06-05 21:18:21,998 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 5880 transitions. Word has length 20 [2021-06-05 21:18:21,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:21,999 INFO L482 AbstractCegarLoop]: Abstraction has 2055 states and 5880 transitions. [2021-06-05 21:18:21,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:21,999 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 5880 transitions. [2021-06-05 21:18:22,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:18:22,000 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:22,000 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:22,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable599 [2021-06-05 21:18:22,201 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:22,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:22,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1259050075, now seen corresponding path program 158 times [2021-06-05 21:18:22,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:22,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099712988] [2021-06-05 21:18:22,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:22,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:22,256 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:22,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:22,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099712988] [2021-06-05 21:18:22,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099712988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:22,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461866299] [2021-06-05 21:18:22,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:22,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:18:22,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:22,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:18:22,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:22,311 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:18:22,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461866299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:22,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:22,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 12 [2021-06-05 21:18:22,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562391951] [2021-06-05 21:18:22,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:18:22,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:22,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:18:22,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:18:22,312 INFO L87 Difference]: Start difference. First operand 2055 states and 5880 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:22,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:22,435 INFO L93 Difference]: Finished difference Result 2691 states and 7378 transitions. [2021-06-05 21:18:22,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:18:22,435 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:18:22,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:22,437 INFO L225 Difference]: With dead ends: 2691 [2021-06-05 21:18:22,437 INFO L226 Difference]: Without dead ends: 2685 [2021-06-05 21:18:22,438 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 108.5ms TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:18:22,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2685 states. [2021-06-05 21:18:22,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2685 to 2055. [2021-06-05 21:18:22,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 2.8612463485881205) internal successors, (5877), 2054 states have internal predecessors, (5877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:22,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 5877 transitions. [2021-06-05 21:18:22,459 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 5877 transitions. Word has length 20 [2021-06-05 21:18:22,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:22,459 INFO L482 AbstractCegarLoop]: Abstraction has 2055 states and 5877 transitions. [2021-06-05 21:18:22,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:22,459 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 5877 transitions. [2021-06-05 21:18:22,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:18:22,461 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:22,461 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:22,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable600,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:22,661 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:22,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:22,662 INFO L82 PathProgramCache]: Analyzing trace with hash -164958487, now seen corresponding path program 159 times [2021-06-05 21:18:22,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:22,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013996315] [2021-06-05 21:18:22,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:22,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:22,725 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:22,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:22,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013996315] [2021-06-05 21:18:22,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013996315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:22,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446132919] [2021-06-05 21:18:22,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:22,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:18:22,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:22,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:18:22,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:22,779 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:22,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446132919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:22,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:22,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:18:22,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394092909] [2021-06-05 21:18:22,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:18:22,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:22,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:18:22,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:18:22,780 INFO L87 Difference]: Start difference. First operand 2055 states and 5877 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:22,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:22,917 INFO L93 Difference]: Finished difference Result 2703 states and 7388 transitions. [2021-06-05 21:18:22,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:18:22,917 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:18:22,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:22,920 INFO L225 Difference]: With dead ends: 2703 [2021-06-05 21:18:22,920 INFO L226 Difference]: Without dead ends: 2695 [2021-06-05 21:18:22,920 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 113.2ms TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:18:22,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2695 states. [2021-06-05 21:18:22,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2695 to 2065. [2021-06-05 21:18:22,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2065 states, 2064 states have (on average 2.862403100775194) internal successors, (5908), 2064 states have internal predecessors, (5908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:22,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 5908 transitions. [2021-06-05 21:18:22,943 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 5908 transitions. Word has length 20 [2021-06-05 21:18:22,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:22,943 INFO L482 AbstractCegarLoop]: Abstraction has 2065 states and 5908 transitions. [2021-06-05 21:18:22,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:22,943 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 5908 transitions. [2021-06-05 21:18:22,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:18:22,945 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:22,945 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:23,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable601 [2021-06-05 21:18:23,146 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:23,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:23,146 INFO L82 PathProgramCache]: Analyzing trace with hash -607857627, now seen corresponding path program 160 times [2021-06-05 21:18:23,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:23,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332621672] [2021-06-05 21:18:23,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:23,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:23,213 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:23,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:23,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332621672] [2021-06-05 21:18:23,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332621672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:23,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080755567] [2021-06-05 21:18:23,214 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:23,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:18:23,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:23,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:18:23,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:23,267 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:23,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080755567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:23,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:23,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-06-05 21:18:23,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529757038] [2021-06-05 21:18:23,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:18:23,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:23,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:18:23,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:18:23,267 INFO L87 Difference]: Start difference. First operand 2065 states and 5908 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:23,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:23,408 INFO L93 Difference]: Finished difference Result 2452 states and 6775 transitions. [2021-06-05 21:18:23,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:18:23,409 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:18:23,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:23,411 INFO L225 Difference]: With dead ends: 2452 [2021-06-05 21:18:23,411 INFO L226 Difference]: Without dead ends: 2442 [2021-06-05 21:18:23,411 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 135.3ms TimeCoverageRelationStatistics Valid=192, Invalid=408, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:18:23,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2021-06-05 21:18:23,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 2065. [2021-06-05 21:18:23,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2065 states, 2064 states have (on average 2.8614341085271318) internal successors, (5906), 2064 states have internal predecessors, (5906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:23,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 5906 transitions. [2021-06-05 21:18:23,430 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 5906 transitions. Word has length 20 [2021-06-05 21:18:23,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:23,430 INFO L482 AbstractCegarLoop]: Abstraction has 2065 states and 5906 transitions. [2021-06-05 21:18:23,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:23,430 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 5906 transitions. [2021-06-05 21:18:23,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:18:23,431 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:23,431 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:23,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable602,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:23,632 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:23,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:23,632 INFO L82 PathProgramCache]: Analyzing trace with hash 130741455, now seen corresponding path program 161 times [2021-06-05 21:18:23,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:23,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103437974] [2021-06-05 21:18:23,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:23,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:23,696 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:23,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:23,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103437974] [2021-06-05 21:18:23,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103437974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:23,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301147001] [2021-06-05 21:18:23,696 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:23,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:18:23,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:23,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:18:23,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:23,771 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:18:23,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301147001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:23,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:23,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-06-05 21:18:23,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385634148] [2021-06-05 21:18:23,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:18:23,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:23,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:18:23,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:18:23,772 INFO L87 Difference]: Start difference. First operand 2065 states and 5906 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:23,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:23,885 INFO L93 Difference]: Finished difference Result 2203 states and 6075 transitions. [2021-06-05 21:18:23,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:18:23,885 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:18:23,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:23,887 INFO L225 Difference]: With dead ends: 2203 [2021-06-05 21:18:23,887 INFO L226 Difference]: Without dead ends: 2199 [2021-06-05 21:18:23,888 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 123.1ms TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:18:23,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-06-05 21:18:23,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 2018. [2021-06-05 21:18:23,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2018 states, 2017 states have (on average 2.8507684680218146) internal successors, (5750), 2017 states have internal predecessors, (5750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:23,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2018 states to 2018 states and 5750 transitions. [2021-06-05 21:18:23,908 INFO L78 Accepts]: Start accepts. Automaton has 2018 states and 5750 transitions. Word has length 20 [2021-06-05 21:18:23,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:23,908 INFO L482 AbstractCegarLoop]: Abstraction has 2018 states and 5750 transitions. [2021-06-05 21:18:23,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:23,908 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states and 5750 transitions. [2021-06-05 21:18:23,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:18:23,910 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:23,910 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:24,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable603,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:24,111 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:24,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:24,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1438631789, now seen corresponding path program 162 times [2021-06-05 21:18:24,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:24,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838115010] [2021-06-05 21:18:24,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:24,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:24,164 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:24,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:24,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838115010] [2021-06-05 21:18:24,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838115010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:24,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391504103] [2021-06-05 21:18:24,164 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:24,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:18:24,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:24,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:18:24,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:24,234 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:24,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391504103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:24,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:24,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:18:24,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979107183] [2021-06-05 21:18:24,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:18:24,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:24,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:18:24,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:18:24,235 INFO L87 Difference]: Start difference. First operand 2018 states and 5750 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:24,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:24,363 INFO L93 Difference]: Finished difference Result 2240 states and 6144 transitions. [2021-06-05 21:18:24,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:18:24,364 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:18:24,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:24,367 INFO L225 Difference]: With dead ends: 2240 [2021-06-05 21:18:24,367 INFO L226 Difference]: Without dead ends: 2231 [2021-06-05 21:18:24,367 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 97.5ms TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:18:24,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2231 states. [2021-06-05 21:18:24,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2231 to 2011. [2021-06-05 21:18:24,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2011 states, 2010 states have (on average 2.846268656716418) internal successors, (5721), 2010 states have internal predecessors, (5721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:24,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2011 states to 2011 states and 5721 transitions. [2021-06-05 21:18:24,396 INFO L78 Accepts]: Start accepts. Automaton has 2011 states and 5721 transitions. Word has length 20 [2021-06-05 21:18:24,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:24,396 INFO L482 AbstractCegarLoop]: Abstraction has 2011 states and 5721 transitions. [2021-06-05 21:18:24,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:24,396 INFO L276 IsEmpty]: Start isEmpty. Operand 2011 states and 5721 transitions. [2021-06-05 21:18:24,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:18:24,398 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:24,398 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:24,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable604 [2021-06-05 21:18:24,621 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:24,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:24,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1762243919, now seen corresponding path program 163 times [2021-06-05 21:18:24,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:24,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789918855] [2021-06-05 21:18:24,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:24,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:24,680 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:24,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:24,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789918855] [2021-06-05 21:18:24,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789918855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:24,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188899901] [2021-06-05 21:18:24,681 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:24,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:24,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:18:24,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:24,732 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:24,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188899901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:24,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:24,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-06-05 21:18:24,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814342116] [2021-06-05 21:18:24,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:18:24,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:24,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:18:24,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:18:24,733 INFO L87 Difference]: Start difference. First operand 2011 states and 5721 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:24,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:24,894 INFO L93 Difference]: Finished difference Result 2239 states and 6126 transitions. [2021-06-05 21:18:24,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:18:24,894 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:18:24,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:24,897 INFO L225 Difference]: With dead ends: 2239 [2021-06-05 21:18:24,897 INFO L226 Difference]: Without dead ends: 2231 [2021-06-05 21:18:24,897 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 129.3ms TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:18:24,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2231 states. [2021-06-05 21:18:24,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2231 to 2024. [2021-06-05 21:18:24,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 2023 states have (on average 2.842313395946614) internal successors, (5750), 2023 states have internal predecessors, (5750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:24,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 5750 transitions. [2021-06-05 21:18:24,935 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 5750 transitions. Word has length 20 [2021-06-05 21:18:24,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:24,935 INFO L482 AbstractCegarLoop]: Abstraction has 2024 states and 5750 transitions. [2021-06-05 21:18:24,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:24,935 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 5750 transitions. [2021-06-05 21:18:24,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:18:24,937 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:24,937 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:25,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable605,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:25,153 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:25,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:25,153 INFO L82 PathProgramCache]: Analyzing trace with hash 2089824237, now seen corresponding path program 164 times [2021-06-05 21:18:25,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:25,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587947469] [2021-06-05 21:18:25,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:25,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:25,221 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:25,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:25,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587947469] [2021-06-05 21:18:25,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587947469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:25,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570721831] [2021-06-05 21:18:25,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:25,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:18:25,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:25,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:18:25,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:25,289 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:25,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570721831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:25,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:25,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-06-05 21:18:25,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704653625] [2021-06-05 21:18:25,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:18:25,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:25,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:18:25,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:18:25,290 INFO L87 Difference]: Start difference. First operand 2024 states and 5750 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:25,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:25,428 INFO L93 Difference]: Finished difference Result 2477 states and 6771 transitions. [2021-06-05 21:18:25,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:18:25,429 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:18:25,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:25,431 INFO L225 Difference]: With dead ends: 2477 [2021-06-05 21:18:25,431 INFO L226 Difference]: Without dead ends: 2467 [2021-06-05 21:18:25,431 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 133.8ms TimeCoverageRelationStatistics Valid=193, Invalid=407, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:18:25,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2467 states. [2021-06-05 21:18:25,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2467 to 2031. [2021-06-05 21:18:25,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 2030 states have (on average 2.840394088669951) internal successors, (5766), 2030 states have internal predecessors, (5766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:25,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 5766 transitions. [2021-06-05 21:18:25,451 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 5766 transitions. Word has length 20 [2021-06-05 21:18:25,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:25,451 INFO L482 AbstractCegarLoop]: Abstraction has 2031 states and 5766 transitions. [2021-06-05 21:18:25,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:25,451 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 5766 transitions. [2021-06-05 21:18:25,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:18:25,452 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:25,453 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:25,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable606,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:25,653 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:25,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:25,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1135579185, now seen corresponding path program 165 times [2021-06-05 21:18:25,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:25,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195323826] [2021-06-05 21:18:25,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:25,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:25,700 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:25,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:25,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195323826] [2021-06-05 21:18:25,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195323826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:25,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549224183] [2021-06-05 21:18:25,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:25,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:18:25,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:25,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:18:25,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:25,759 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:25,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549224183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:25,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:25,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:18:25,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494295886] [2021-06-05 21:18:25,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:18:25,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:25,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:18:25,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:18:25,759 INFO L87 Difference]: Start difference. First operand 2031 states and 5766 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:25,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:25,836 INFO L93 Difference]: Finished difference Result 2228 states and 6076 transitions. [2021-06-05 21:18:25,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:18:25,836 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:18:25,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:25,839 INFO L225 Difference]: With dead ends: 2228 [2021-06-05 21:18:25,839 INFO L226 Difference]: Without dead ends: 2228 [2021-06-05 21:18:25,839 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 61.2ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:18:25,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2228 states. [2021-06-05 21:18:25,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2228 to 2015. [2021-06-05 21:18:25,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2015 states, 2014 states have (on average 2.837140019860973) internal successors, (5714), 2014 states have internal predecessors, (5714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:25,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2015 states to 2015 states and 5714 transitions. [2021-06-05 21:18:25,862 INFO L78 Accepts]: Start accepts. Automaton has 2015 states and 5714 transitions. Word has length 20 [2021-06-05 21:18:25,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:25,862 INFO L482 AbstractCegarLoop]: Abstraction has 2015 states and 5714 transitions. [2021-06-05 21:18:25,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:25,862 INFO L276 IsEmpty]: Start isEmpty. Operand 2015 states and 5714 transitions. [2021-06-05 21:18:25,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:18:25,863 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:25,863 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:26,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable607,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:26,065 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:26,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:26,065 INFO L82 PathProgramCache]: Analyzing trace with hash -460779053, now seen corresponding path program 166 times [2021-06-05 21:18:26,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:26,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784748151] [2021-06-05 21:18:26,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:26,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:26,127 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:26,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:26,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784748151] [2021-06-05 21:18:26,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784748151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:26,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879603173] [2021-06-05 21:18:26,128 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:26,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:18:26,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:26,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:18:26,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:26,185 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:26,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879603173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:26,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:26,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-06-05 21:18:26,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185369228] [2021-06-05 21:18:26,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:18:26,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:26,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:18:26,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:18:26,186 INFO L87 Difference]: Start difference. First operand 2015 states and 5714 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:26,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:26,344 INFO L93 Difference]: Finished difference Result 2228 states and 6116 transitions. [2021-06-05 21:18:26,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:18:26,344 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:18:26,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:26,346 INFO L225 Difference]: With dead ends: 2228 [2021-06-05 21:18:26,346 INFO L226 Difference]: Without dead ends: 2218 [2021-06-05 21:18:26,346 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 131.7ms TimeCoverageRelationStatistics Valid=192, Invalid=408, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:18:26,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2218 states. [2021-06-05 21:18:26,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2218 to 2010. [2021-06-05 21:18:26,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2010 states, 2009 states have (on average 2.8322548531607765) internal successors, (5690), 2009 states have internal predecessors, (5690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:26,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2010 states to 2010 states and 5690 transitions. [2021-06-05 21:18:26,368 INFO L78 Accepts]: Start accepts. Automaton has 2010 states and 5690 transitions. Word has length 20 [2021-06-05 21:18:26,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:26,368 INFO L482 AbstractCegarLoop]: Abstraction has 2010 states and 5690 transitions. [2021-06-05 21:18:26,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:26,368 INFO L276 IsEmpty]: Start isEmpty. Operand 2010 states and 5690 transitions. [2021-06-05 21:18:26,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:18:26,369 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:26,369 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:26,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable608,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:26,570 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:26,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:26,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1325858673, now seen corresponding path program 167 times [2021-06-05 21:18:26,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:26,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46740170] [2021-06-05 21:18:26,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:26,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:26,610 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:26,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:26,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46740170] [2021-06-05 21:18:26,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46740170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:26,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537298542] [2021-06-05 21:18:26,611 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:26,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:18:26,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:26,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:18:26,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:26,668 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:18:26,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537298542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:26,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:26,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-05 21:18:26,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727587504] [2021-06-05 21:18:26,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:18:26,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:26,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:18:26,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:18:26,669 INFO L87 Difference]: Start difference. First operand 2010 states and 5690 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:26,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:26,729 INFO L93 Difference]: Finished difference Result 2251 states and 6063 transitions. [2021-06-05 21:18:26,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:18:26,729 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:18:26,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:26,731 INFO L225 Difference]: With dead ends: 2251 [2021-06-05 21:18:26,731 INFO L226 Difference]: Without dead ends: 2251 [2021-06-05 21:18:26,731 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 46.2ms TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:18:26,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2251 states. [2021-06-05 21:18:26,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2251 to 2017. [2021-06-05 21:18:26,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2017 states, 2016 states have (on average 2.8348214285714284) internal successors, (5715), 2016 states have internal predecessors, (5715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:26,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 5715 transitions. [2021-06-05 21:18:26,754 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 5715 transitions. Word has length 20 [2021-06-05 21:18:26,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:26,754 INFO L482 AbstractCegarLoop]: Abstraction has 2017 states and 5715 transitions. [2021-06-05 21:18:26,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:26,754 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 5715 transitions. [2021-06-05 21:18:26,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:18:26,756 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:26,756 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:26,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable609,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:26,957 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:26,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:26,957 INFO L82 PathProgramCache]: Analyzing trace with hash 2130209325, now seen corresponding path program 168 times [2021-06-05 21:18:26,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:26,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978659371] [2021-06-05 21:18:26,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:26,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:27,006 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:27,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:27,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978659371] [2021-06-05 21:18:27,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978659371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:27,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987920967] [2021-06-05 21:18:27,006 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:27,029 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:18:27,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:27,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:18:27,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:27,059 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:27,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987920967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:27,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:27,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:18:27,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170827863] [2021-06-05 21:18:27,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:18:27,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:27,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:18:27,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:18:27,060 INFO L87 Difference]: Start difference. First operand 2017 states and 5715 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:27,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:27,162 INFO L93 Difference]: Finished difference Result 2206 states and 5970 transitions. [2021-06-05 21:18:27,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:18:27,163 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:18:27,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:27,165 INFO L225 Difference]: With dead ends: 2206 [2021-06-05 21:18:27,165 INFO L226 Difference]: Without dead ends: 2204 [2021-06-05 21:18:27,165 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 82.2ms TimeCoverageRelationStatistics Valid=119, Invalid=223, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:18:27,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2204 states. [2021-06-05 21:18:27,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2204 to 2017. [2021-06-05 21:18:27,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2017 states, 2016 states have (on average 2.831845238095238) internal successors, (5709), 2016 states have internal predecessors, (5709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:27,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 5709 transitions. [2021-06-05 21:18:27,187 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 5709 transitions. Word has length 20 [2021-06-05 21:18:27,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:27,187 INFO L482 AbstractCegarLoop]: Abstraction has 2017 states and 5709 transitions. [2021-06-05 21:18:27,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:27,187 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 5709 transitions. [2021-06-05 21:18:27,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:18:27,188 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:27,188 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:27,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable610,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:27,389 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:27,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:27,389 INFO L82 PathProgramCache]: Analyzing trace with hash -675352975, now seen corresponding path program 169 times [2021-06-05 21:18:27,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:27,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875371817] [2021-06-05 21:18:27,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:27,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:27,445 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:27,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:27,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875371817] [2021-06-05 21:18:27,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875371817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:27,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030463555] [2021-06-05 21:18:27,446 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:27,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:27,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:18:27,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:27,501 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 22 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:18:27,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030463555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:27,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:27,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2021-06-05 21:18:27,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754764556] [2021-06-05 21:18:27,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:18:27,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:27,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:18:27,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:18:27,501 INFO L87 Difference]: Start difference. First operand 2017 states and 5709 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:27,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:27,622 INFO L93 Difference]: Finished difference Result 2212 states and 5972 transitions. [2021-06-05 21:18:27,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:18:27,622 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:18:27,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:27,625 INFO L225 Difference]: With dead ends: 2212 [2021-06-05 21:18:27,625 INFO L226 Difference]: Without dead ends: 2208 [2021-06-05 21:18:27,625 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 97.5ms TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:18:27,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2021-06-05 21:18:27,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 2017. [2021-06-05 21:18:27,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2017 states, 2016 states have (on average 2.825892857142857) internal successors, (5697), 2016 states have internal predecessors, (5697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:27,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 5697 transitions. [2021-06-05 21:18:27,646 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 5697 transitions. Word has length 20 [2021-06-05 21:18:27,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:27,646 INFO L482 AbstractCegarLoop]: Abstraction has 2017 states and 5697 transitions. [2021-06-05 21:18:27,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:27,646 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 5697 transitions. [2021-06-05 21:18:27,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:18:27,647 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:27,647 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:27,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable611 [2021-06-05 21:18:27,848 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:27,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:27,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1748438355, now seen corresponding path program 170 times [2021-06-05 21:18:27,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:27,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300599065] [2021-06-05 21:18:27,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:27,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:27,910 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:27,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:27,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300599065] [2021-06-05 21:18:27,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300599065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:27,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474692958] [2021-06-05 21:18:27,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:27,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:18:27,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:27,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:18:27,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:27,995 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:27,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474692958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:27,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:27,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-06-05 21:18:27,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359791575] [2021-06-05 21:18:27,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:18:27,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:27,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:18:27,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:18:27,996 INFO L87 Difference]: Start difference. First operand 2017 states and 5697 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:28,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:28,129 INFO L93 Difference]: Finished difference Result 2220 states and 5971 transitions. [2021-06-05 21:18:28,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:18:28,130 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:18:28,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:28,132 INFO L225 Difference]: With dead ends: 2220 [2021-06-05 21:18:28,132 INFO L226 Difference]: Without dead ends: 2214 [2021-06-05 21:18:28,132 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 115.1ms TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:18:28,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2214 states. [2021-06-05 21:18:28,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2214 to 2017. [2021-06-05 21:18:28,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2017 states, 2016 states have (on average 2.8179563492063493) internal successors, (5681), 2016 states have internal predecessors, (5681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:28,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 5681 transitions. [2021-06-05 21:18:28,153 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 5681 transitions. Word has length 20 [2021-06-05 21:18:28,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:28,153 INFO L482 AbstractCegarLoop]: Abstraction has 2017 states and 5681 transitions. [2021-06-05 21:18:28,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:28,153 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 5681 transitions. [2021-06-05 21:18:28,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:18:28,155 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:28,155 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:28,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable612,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:28,355 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:28,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:28,356 INFO L82 PathProgramCache]: Analyzing trace with hash -654346767, now seen corresponding path program 171 times [2021-06-05 21:18:28,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:28,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675314164] [2021-06-05 21:18:28,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:28,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:28,412 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:28,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:28,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675314164] [2021-06-05 21:18:28,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675314164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:28,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664496393] [2021-06-05 21:18:28,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:28,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:18:28,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:28,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:18:28,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:28,471 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:28,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664496393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:28,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:28,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:18:28,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508578696] [2021-06-05 21:18:28,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:18:28,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:28,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:18:28,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:18:28,474 INFO L87 Difference]: Start difference. First operand 2017 states and 5681 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:28,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:28,611 INFO L93 Difference]: Finished difference Result 2831 states and 7603 transitions. [2021-06-05 21:18:28,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:18:28,612 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:18:28,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:28,614 INFO L225 Difference]: With dead ends: 2831 [2021-06-05 21:18:28,615 INFO L226 Difference]: Without dead ends: 2823 [2021-06-05 21:18:28,615 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 119.6ms TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:18:28,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2823 states. [2021-06-05 21:18:28,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2823 to 2036. [2021-06-05 21:18:28,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2036 states, 2035 states have (on average 2.8147420147420146) internal successors, (5728), 2035 states have internal predecessors, (5728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:28,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2036 states to 2036 states and 5728 transitions. [2021-06-05 21:18:28,637 INFO L78 Accepts]: Start accepts. Automaton has 2036 states and 5728 transitions. Word has length 20 [2021-06-05 21:18:28,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:28,638 INFO L482 AbstractCegarLoop]: Abstraction has 2036 states and 5728 transitions. [2021-06-05 21:18:28,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:28,638 INFO L276 IsEmpty]: Start isEmpty. Operand 2036 states and 5728 transitions. [2021-06-05 21:18:28,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:18:28,639 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:28,639 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:28,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable613 [2021-06-05 21:18:28,840 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:28,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:28,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1097245907, now seen corresponding path program 172 times [2021-06-05 21:18:28,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:28,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441589613] [2021-06-05 21:18:28,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:28,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:28,922 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:28,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:28,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441589613] [2021-06-05 21:18:28,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441589613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:28,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571165135] [2021-06-05 21:18:28,922 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:28,948 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:18:28,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:28,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:18:28,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:28,982 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:28,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571165135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:28,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:28,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-06-05 21:18:28,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279800558] [2021-06-05 21:18:28,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:18:28,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:28,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:18:28,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:18:28,983 INFO L87 Difference]: Start difference. First operand 2036 states and 5728 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:29,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:29,143 INFO L93 Difference]: Finished difference Result 2850 states and 7623 transitions. [2021-06-05 21:18:29,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:18:29,143 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:18:29,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:29,147 INFO L225 Difference]: With dead ends: 2850 [2021-06-05 21:18:29,147 INFO L226 Difference]: Without dead ends: 2840 [2021-06-05 21:18:29,147 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 154.3ms TimeCoverageRelationStatistics Valid=209, Invalid=441, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:18:29,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2021-06-05 21:18:29,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 2053. [2021-06-05 21:18:29,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2053 states, 2052 states have (on average 2.8118908382066277) internal successors, (5770), 2052 states have internal predecessors, (5770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:29,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2053 states to 2053 states and 5770 transitions. [2021-06-05 21:18:29,171 INFO L78 Accepts]: Start accepts. Automaton has 2053 states and 5770 transitions. Word has length 20 [2021-06-05 21:18:29,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:29,171 INFO L482 AbstractCegarLoop]: Abstraction has 2053 states and 5770 transitions. [2021-06-05 21:18:29,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:29,171 INFO L276 IsEmpty]: Start isEmpty. Operand 2053 states and 5770 transitions. [2021-06-05 21:18:29,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:18:29,173 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:29,173 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:29,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable614,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:29,373 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:29,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:29,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1942217359, now seen corresponding path program 173 times [2021-06-05 21:18:29,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:29,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952086253] [2021-06-05 21:18:29,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:29,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:29,439 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:29,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:29,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952086253] [2021-06-05 21:18:29,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952086253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:29,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935972166] [2021-06-05 21:18:29,440 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:29,462 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:18:29,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:29,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:18:29,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:29,497 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:29,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935972166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:29,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:29,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-06-05 21:18:29,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872684858] [2021-06-05 21:18:29,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:18:29,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:29,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:18:29,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:18:29,498 INFO L87 Difference]: Start difference. First operand 2053 states and 5770 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:29,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:29,689 INFO L93 Difference]: Finished difference Result 2624 states and 7060 transitions. [2021-06-05 21:18:29,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:18:29,689 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:18:29,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:29,692 INFO L225 Difference]: With dead ends: 2624 [2021-06-05 21:18:29,692 INFO L226 Difference]: Without dead ends: 2612 [2021-06-05 21:18:29,692 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 167.8ms TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:18:29,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2612 states. [2021-06-05 21:18:29,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2612 to 2055. [2021-06-05 21:18:29,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 2.809152872444012) internal successors, (5770), 2054 states have internal predecessors, (5770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:29,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 5770 transitions. [2021-06-05 21:18:29,715 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 5770 transitions. Word has length 20 [2021-06-05 21:18:29,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:29,715 INFO L482 AbstractCegarLoop]: Abstraction has 2055 states and 5770 transitions. [2021-06-05 21:18:29,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:29,715 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 5770 transitions. [2021-06-05 21:18:29,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:18:29,717 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:29,717 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:29,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable615,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:29,917 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:29,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:29,917 INFO L82 PathProgramCache]: Analyzing trace with hash -2140466681, now seen corresponding path program 174 times [2021-06-05 21:18:29,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:29,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72743060] [2021-06-05 21:18:29,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:29,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:29,992 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:29,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:29,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72743060] [2021-06-05 21:18:29,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72743060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:29,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737016162] [2021-06-05 21:18:29,993 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:30,016 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:18:30,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:30,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:18:30,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:30,057 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:30,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737016162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:30,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:30,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-06-05 21:18:30,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143268813] [2021-06-05 21:18:30,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:18:30,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:30,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:18:30,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:18:30,058 INFO L87 Difference]: Start difference. First operand 2055 states and 5770 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:30,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:30,188 INFO L93 Difference]: Finished difference Result 2268 states and 6139 transitions. [2021-06-05 21:18:30,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:18:30,188 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:18:30,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:30,190 INFO L225 Difference]: With dead ends: 2268 [2021-06-05 21:18:30,190 INFO L226 Difference]: Without dead ends: 2264 [2021-06-05 21:18:30,190 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 110.2ms TimeCoverageRelationStatistics Valid=154, Invalid=308, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:18:30,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-06-05 21:18:30,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 2086. [2021-06-05 21:18:30,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2086 states, 2085 states have (on average 2.8134292565947243) internal successors, (5866), 2085 states have internal predecessors, (5866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:30,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2086 states to 2086 states and 5866 transitions. [2021-06-05 21:18:30,210 INFO L78 Accepts]: Start accepts. Automaton has 2086 states and 5866 transitions. Word has length 20 [2021-06-05 21:18:30,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:30,210 INFO L482 AbstractCegarLoop]: Abstraction has 2086 states and 5866 transitions. [2021-06-05 21:18:30,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:30,211 INFO L276 IsEmpty]: Start isEmpty. Operand 2086 states and 5866 transitions. [2021-06-05 21:18:30,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:18:30,212 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:30,212 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:30,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable616 [2021-06-05 21:18:30,413 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:30,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:30,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1369412393, now seen corresponding path program 175 times [2021-06-05 21:18:30,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:30,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134165749] [2021-06-05 21:18:30,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:30,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:30,470 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:30,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:30,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134165749] [2021-06-05 21:18:30,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134165749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:30,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917685799] [2021-06-05 21:18:30,470 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:30,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:30,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:18:30,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:30,537 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:18:30,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917685799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:30,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:30,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 14 [2021-06-05 21:18:30,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373354915] [2021-06-05 21:18:30,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:18:30,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:30,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:18:30,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:18:30,538 INFO L87 Difference]: Start difference. First operand 2086 states and 5866 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:30,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:30,673 INFO L93 Difference]: Finished difference Result 2348 states and 6353 transitions. [2021-06-05 21:18:30,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:18:30,674 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:18:30,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:30,676 INFO L225 Difference]: With dead ends: 2348 [2021-06-05 21:18:30,676 INFO L226 Difference]: Without dead ends: 2340 [2021-06-05 21:18:30,676 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 119.2ms TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:18:30,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2340 states. [2021-06-05 21:18:30,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2340 to 2086. [2021-06-05 21:18:30,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2086 states, 2085 states have (on average 2.809592326139089) internal successors, (5858), 2085 states have internal predecessors, (5858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:30,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2086 states to 2086 states and 5858 transitions. [2021-06-05 21:18:30,696 INFO L78 Accepts]: Start accepts. Automaton has 2086 states and 5858 transitions. Word has length 20 [2021-06-05 21:18:30,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:30,696 INFO L482 AbstractCegarLoop]: Abstraction has 2086 states and 5858 transitions. [2021-06-05 21:18:30,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:30,696 INFO L276 IsEmpty]: Start isEmpty. Operand 2086 states and 5858 transitions. [2021-06-05 21:18:30,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:18:30,698 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:30,698 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:30,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable617,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:30,899 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:30,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:30,899 INFO L82 PathProgramCache]: Analyzing trace with hash 926513253, now seen corresponding path program 176 times [2021-06-05 21:18:30,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:30,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707740306] [2021-06-05 21:18:30,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:30,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:30,991 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:30,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:30,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707740306] [2021-06-05 21:18:30,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707740306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:30,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895463060] [2021-06-05 21:18:30,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:31,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:18:31,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:31,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:18:31,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:31,058 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:31,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895463060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:31,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:31,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 15 [2021-06-05 21:18:31,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336838167] [2021-06-05 21:18:31,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:18:31,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:31,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:18:31,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:18:31,059 INFO L87 Difference]: Start difference. First operand 2086 states and 5858 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:31,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:31,208 INFO L93 Difference]: Finished difference Result 2366 states and 6371 transitions. [2021-06-05 21:18:31,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:18:31,208 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:18:31,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:31,210 INFO L225 Difference]: With dead ends: 2366 [2021-06-05 21:18:31,210 INFO L226 Difference]: Without dead ends: 2356 [2021-06-05 21:18:31,210 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 145.0ms TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:18:31,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2356 states. [2021-06-05 21:18:31,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2356 to 2100. [2021-06-05 21:18:31,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2100 states, 2099 states have (on average 2.8075273939971415) internal successors, (5893), 2099 states have internal predecessors, (5893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:31,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2100 states to 2100 states and 5893 transitions. [2021-06-05 21:18:31,240 INFO L78 Accepts]: Start accepts. Automaton has 2100 states and 5893 transitions. Word has length 20 [2021-06-05 21:18:31,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:31,241 INFO L482 AbstractCegarLoop]: Abstraction has 2100 states and 5893 transitions. [2021-06-05 21:18:31,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:31,241 INFO L276 IsEmpty]: Start isEmpty. Operand 2100 states and 5893 transitions. [2021-06-05 21:18:31,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:18:31,243 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:31,243 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:31,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable618,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:31,464 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:31,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:31,465 INFO L82 PathProgramCache]: Analyzing trace with hash 81541801, now seen corresponding path program 177 times [2021-06-05 21:18:31,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:31,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886983070] [2021-06-05 21:18:31,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:31,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:31,532 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:31,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:31,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886983070] [2021-06-05 21:18:31,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886983070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:31,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8250144] [2021-06-05 21:18:31,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:31,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:18:31,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:31,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:18:31,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:31,599 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:31,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8250144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:31,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:31,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-05 21:18:31,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151090624] [2021-06-05 21:18:31,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:18:31,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:31,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:18:31,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:18:31,599 INFO L87 Difference]: Start difference. First operand 2100 states and 5893 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:31,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:31,781 INFO L93 Difference]: Finished difference Result 2617 states and 7055 transitions. [2021-06-05 21:18:31,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:18:31,782 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:18:31,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:31,784 INFO L225 Difference]: With dead ends: 2617 [2021-06-05 21:18:31,784 INFO L226 Difference]: Without dead ends: 2605 [2021-06-05 21:18:31,785 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 170.0ms TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:18:31,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2605 states. [2021-06-05 21:18:31,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2605 to 2100. [2021-06-05 21:18:31,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2100 states, 2099 states have (on average 2.806574559313959) internal successors, (5891), 2099 states have internal predecessors, (5891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:31,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2100 states to 2100 states and 5891 transitions. [2021-06-05 21:18:31,807 INFO L78 Accepts]: Start accepts. Automaton has 2100 states and 5891 transitions. Word has length 20 [2021-06-05 21:18:31,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:31,808 INFO L482 AbstractCegarLoop]: Abstraction has 2100 states and 5891 transitions. [2021-06-05 21:18:31,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:31,808 INFO L276 IsEmpty]: Start isEmpty. Operand 2100 states and 5891 transitions. [2021-06-05 21:18:31,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:18:31,810 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:31,810 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:32,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable619,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:32,010 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:32,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:32,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1400047683, now seen corresponding path program 178 times [2021-06-05 21:18:32,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:32,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234982634] [2021-06-05 21:18:32,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:32,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:32,074 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:32,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:32,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234982634] [2021-06-05 21:18:32,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234982634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:32,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119166821] [2021-06-05 21:18:32,074 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:32,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:18:32,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:32,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:18:32,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:32,160 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:32,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119166821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:32,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:32,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-06-05 21:18:32,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265100713] [2021-06-05 21:18:32,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:18:32,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:32,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:18:32,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:18:32,161 INFO L87 Difference]: Start difference. First operand 2100 states and 5891 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:32,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:32,276 INFO L93 Difference]: Finished difference Result 2417 states and 6519 transitions. [2021-06-05 21:18:32,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:18:32,276 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:18:32,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:32,279 INFO L225 Difference]: With dead ends: 2417 [2021-06-05 21:18:32,279 INFO L226 Difference]: Without dead ends: 2417 [2021-06-05 21:18:32,279 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 99.5ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:18:32,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2021-06-05 21:18:32,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 2170. [2021-06-05 21:18:32,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2170 states, 2169 states have (on average 2.827109266943292) internal successors, (6132), 2169 states have internal predecessors, (6132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:32,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2170 states to 2170 states and 6132 transitions. [2021-06-05 21:18:32,308 INFO L78 Accepts]: Start accepts. Automaton has 2170 states and 6132 transitions. Word has length 20 [2021-06-05 21:18:32,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:32,308 INFO L482 AbstractCegarLoop]: Abstraction has 2170 states and 6132 transitions. [2021-06-05 21:18:32,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:32,309 INFO L276 IsEmpty]: Start isEmpty. Operand 2170 states and 6132 transitions. [2021-06-05 21:18:32,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:18:32,311 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:32,311 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:32,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable620 [2021-06-05 21:18:32,532 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:32,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:32,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1677748861, now seen corresponding path program 179 times [2021-06-05 21:18:32,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:32,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895584977] [2021-06-05 21:18:32,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:32,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:32,613 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:32,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:32,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895584977] [2021-06-05 21:18:32,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895584977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:32,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681805295] [2021-06-05 21:18:32,614 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:32,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:18:32,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:32,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:18:32,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:32,707 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:32,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681805295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:32,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:32,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 16 [2021-06-05 21:18:32,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661257672] [2021-06-05 21:18:32,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:18:32,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:32,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:18:32,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:18:32,708 INFO L87 Difference]: Start difference. First operand 2170 states and 6132 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:32,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:32,868 INFO L93 Difference]: Finished difference Result 2716 states and 7385 transitions. [2021-06-05 21:18:32,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:18:32,868 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:18:32,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:32,871 INFO L225 Difference]: With dead ends: 2716 [2021-06-05 21:18:32,871 INFO L226 Difference]: Without dead ends: 2704 [2021-06-05 21:18:32,871 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 173.0ms TimeCoverageRelationStatistics Valid=206, Invalid=496, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:18:32,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2704 states. [2021-06-05 21:18:32,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2704 to 2170. [2021-06-05 21:18:32,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2170 states, 2169 states have (on average 2.8261871830336562) internal successors, (6130), 2169 states have internal predecessors, (6130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:32,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2170 states to 2170 states and 6130 transitions. [2021-06-05 21:18:32,895 INFO L78 Accepts]: Start accepts. Automaton has 2170 states and 6130 transitions. Word has length 20 [2021-06-05 21:18:32,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:32,895 INFO L482 AbstractCegarLoop]: Abstraction has 2170 states and 6130 transitions. [2021-06-05 21:18:32,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:32,896 INFO L276 IsEmpty]: Start isEmpty. Operand 2170 states and 6130 transitions. [2021-06-05 21:18:32,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:18:32,897 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:32,898 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:33,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable621 [2021-06-05 21:18:33,098 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:33,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:33,098 INFO L82 PathProgramCache]: Analyzing trace with hash 682973831, now seen corresponding path program 180 times [2021-06-05 21:18:33,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:33,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295982416] [2021-06-05 21:18:33,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:33,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:33,163 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:33,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:33,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295982416] [2021-06-05 21:18:33,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295982416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:33,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729185864] [2021-06-05 21:18:33,163 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:33,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:18:33,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:33,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:18:33,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:33,226 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:33,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729185864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:33,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:33,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 14 [2021-06-05 21:18:33,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373303374] [2021-06-05 21:18:33,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:18:33,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:33,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:18:33,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:18:33,227 INFO L87 Difference]: Start difference. First operand 2170 states and 6130 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:33,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:33,308 INFO L93 Difference]: Finished difference Result 2664 states and 7257 transitions. [2021-06-05 21:18:33,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:18:33,308 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:18:33,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:33,310 INFO L225 Difference]: With dead ends: 2664 [2021-06-05 21:18:33,310 INFO L226 Difference]: Without dead ends: 2664 [2021-06-05 21:18:33,311 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 72.0ms TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:18:33,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2664 states. [2021-06-05 21:18:33,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2664 to 2389. [2021-06-05 21:18:33,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2389 states, 2388 states have (on average 2.8618090452261304) internal successors, (6834), 2388 states have internal predecessors, (6834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:33,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2389 states to 2389 states and 6834 transitions. [2021-06-05 21:18:33,334 INFO L78 Accepts]: Start accepts. Automaton has 2389 states and 6834 transitions. Word has length 20 [2021-06-05 21:18:33,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:33,334 INFO L482 AbstractCegarLoop]: Abstraction has 2389 states and 6834 transitions. [2021-06-05 21:18:33,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:33,335 INFO L276 IsEmpty]: Start isEmpty. Operand 2389 states and 6834 transitions. [2021-06-05 21:18:33,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:18:33,336 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:33,336 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:33,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable622,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:33,537 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:33,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:33,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1866538775, now seen corresponding path program 181 times [2021-06-05 21:18:33,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:33,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136702799] [2021-06-05 21:18:33,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:33,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:33,614 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:33,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:33,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136702799] [2021-06-05 21:18:33,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136702799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:33,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595255386] [2021-06-05 21:18:33,615 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:33,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:33,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:18:33,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:33,683 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 35 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:33,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595255386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:33,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:33,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 15 [2021-06-05 21:18:33,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307071257] [2021-06-05 21:18:33,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:18:33,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:33,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:18:33,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:18:33,684 INFO L87 Difference]: Start difference. First operand 2389 states and 6834 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:33,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:33,751 INFO L93 Difference]: Finished difference Result 2613 states and 7149 transitions. [2021-06-05 21:18:33,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:18:33,752 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:18:33,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:33,754 INFO L225 Difference]: With dead ends: 2613 [2021-06-05 21:18:33,754 INFO L226 Difference]: Without dead ends: 2613 [2021-06-05 21:18:33,754 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 84.9ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:18:33,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2613 states. [2021-06-05 21:18:33,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2613 to 2388. [2021-06-05 21:18:33,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2388 states, 2387 states have (on average 2.860913280268119) internal successors, (6829), 2387 states have internal predecessors, (6829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:33,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2388 states to 2388 states and 6829 transitions. [2021-06-05 21:18:33,790 INFO L78 Accepts]: Start accepts. Automaton has 2388 states and 6829 transitions. Word has length 20 [2021-06-05 21:18:33,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:33,790 INFO L482 AbstractCegarLoop]: Abstraction has 2388 states and 6829 transitions. [2021-06-05 21:18:33,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:33,790 INFO L276 IsEmpty]: Start isEmpty. Operand 2388 states and 6829 transitions. [2021-06-05 21:18:33,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:18:33,792 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:33,792 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:33,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable623 [2021-06-05 21:18:33,992 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:33,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:33,993 INFO L82 PathProgramCache]: Analyzing trace with hash -155925467, now seen corresponding path program 182 times [2021-06-05 21:18:33,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:33,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28233078] [2021-06-05 21:18:33,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:33,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:34,058 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:34,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:34,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28233078] [2021-06-05 21:18:34,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28233078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:34,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971291217] [2021-06-05 21:18:34,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:34,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:18:34,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:34,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:18:34,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:34,136 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 31 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:18:34,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971291217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:34,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:34,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 14 [2021-06-05 21:18:34,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669557608] [2021-06-05 21:18:34,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:18:34,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:34,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:18:34,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:18:34,137 INFO L87 Difference]: Start difference. First operand 2388 states and 6829 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:34,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:34,265 INFO L93 Difference]: Finished difference Result 2617 states and 7158 transitions. [2021-06-05 21:18:34,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:18:34,265 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:18:34,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:34,267 INFO L225 Difference]: With dead ends: 2617 [2021-06-05 21:18:34,267 INFO L226 Difference]: Without dead ends: 2615 [2021-06-05 21:18:34,267 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 114.8ms TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:18:34,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2615 states. [2021-06-05 21:18:34,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2615 to 2388. [2021-06-05 21:18:34,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2388 states, 2387 states have (on average 2.8600754084625053) internal successors, (6827), 2387 states have internal predecessors, (6827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:34,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2388 states to 2388 states and 6827 transitions. [2021-06-05 21:18:34,292 INFO L78 Accepts]: Start accepts. Automaton has 2388 states and 6827 transitions. Word has length 20 [2021-06-05 21:18:34,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:34,292 INFO L482 AbstractCegarLoop]: Abstraction has 2388 states and 6827 transitions. [2021-06-05 21:18:34,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:34,292 INFO L276 IsEmpty]: Start isEmpty. Operand 2388 states and 6827 transitions. [2021-06-05 21:18:34,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:18:34,294 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:34,294 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:34,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable624 [2021-06-05 21:18:34,495 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:34,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:34,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1333479529, now seen corresponding path program 183 times [2021-06-05 21:18:34,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:34,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541816556] [2021-06-05 21:18:34,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:34,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:34,560 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:34,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:34,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541816556] [2021-06-05 21:18:34,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541816556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:34,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773792340] [2021-06-05 21:18:34,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:34,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:18:34,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:34,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:18:34,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:34,626 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:34,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773792340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:34,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:34,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 15 [2021-06-05 21:18:34,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047643589] [2021-06-05 21:18:34,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:18:34,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:34,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:18:34,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:18:34,627 INFO L87 Difference]: Start difference. First operand 2388 states and 6827 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:34,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:34,766 INFO L93 Difference]: Finished difference Result 2623 states and 7164 transitions. [2021-06-05 21:18:34,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:18:34,766 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:18:34,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:34,769 INFO L225 Difference]: With dead ends: 2623 [2021-06-05 21:18:34,769 INFO L226 Difference]: Without dead ends: 2619 [2021-06-05 21:18:34,769 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 126.6ms TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:18:34,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2619 states. [2021-06-05 21:18:34,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2619 to 2395. [2021-06-05 21:18:34,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2395 states, 2394 states have (on average 2.8613199665831246) internal successors, (6850), 2394 states have internal predecessors, (6850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:34,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2395 states to 2395 states and 6850 transitions. [2021-06-05 21:18:34,794 INFO L78 Accepts]: Start accepts. Automaton has 2395 states and 6850 transitions. Word has length 20 [2021-06-05 21:18:34,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:34,794 INFO L482 AbstractCegarLoop]: Abstraction has 2395 states and 6850 transitions. [2021-06-05 21:18:34,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:34,794 INFO L276 IsEmpty]: Start isEmpty. Operand 2395 states and 6850 transitions. [2021-06-05 21:18:34,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:18:34,796 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:34,796 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:34,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable625 [2021-06-05 21:18:34,997 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:34,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:34,997 INFO L82 PathProgramCache]: Analyzing trace with hash 260394149, now seen corresponding path program 184 times [2021-06-05 21:18:34,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:34,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132780696] [2021-06-05 21:18:34,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:34,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:35,063 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:35,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:35,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132780696] [2021-06-05 21:18:35,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132780696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:35,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142882928] [2021-06-05 21:18:35,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:35,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:18:35,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:35,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:18:35,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:35,141 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:18:35,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142882928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:35,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:35,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 15 [2021-06-05 21:18:35,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810509873] [2021-06-05 21:18:35,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:18:35,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:35,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:18:35,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:18:35,141 INFO L87 Difference]: Start difference. First operand 2395 states and 6850 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:35,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:35,275 INFO L93 Difference]: Finished difference Result 3316 states and 9099 transitions. [2021-06-05 21:18:35,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:18:35,276 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:18:35,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:35,279 INFO L225 Difference]: With dead ends: 3316 [2021-06-05 21:18:35,279 INFO L226 Difference]: Without dead ends: 3310 [2021-06-05 21:18:35,279 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 126.4ms TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:18:35,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3310 states. [2021-06-05 21:18:35,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3310 to 2395. [2021-06-05 21:18:35,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2395 states, 2394 states have (on average 2.8592314118629907) internal successors, (6845), 2394 states have internal predecessors, (6845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:35,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2395 states to 2395 states and 6845 transitions. [2021-06-05 21:18:35,307 INFO L78 Accepts]: Start accepts. Automaton has 2395 states and 6845 transitions. Word has length 20 [2021-06-05 21:18:35,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:35,307 INFO L482 AbstractCegarLoop]: Abstraction has 2395 states and 6845 transitions. [2021-06-05 21:18:35,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:35,307 INFO L276 IsEmpty]: Start isEmpty. Operand 2395 states and 6845 transitions. [2021-06-05 21:18:35,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:18:35,309 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:35,309 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:35,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable626,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:35,510 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:35,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:35,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1354485737, now seen corresponding path program 185 times [2021-06-05 21:18:35,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:35,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673910953] [2021-06-05 21:18:35,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:35,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:35,588 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:35,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:35,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673910953] [2021-06-05 21:18:35,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673910953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:35,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956175983] [2021-06-05 21:18:35,589 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:35,618 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:18:35,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:35,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:18:35,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:35,680 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 22 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:35,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956175983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:35,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:35,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 16 [2021-06-05 21:18:35,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910378866] [2021-06-05 21:18:35,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:18:35,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:35,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:18:35,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:18:35,681 INFO L87 Difference]: Start difference. First operand 2395 states and 6845 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:35,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:35,861 INFO L93 Difference]: Finished difference Result 3332 states and 9114 transitions. [2021-06-05 21:18:35,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:18:35,861 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:18:35,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:35,866 INFO L225 Difference]: With dead ends: 3332 [2021-06-05 21:18:35,866 INFO L226 Difference]: Without dead ends: 3324 [2021-06-05 21:18:35,867 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 167.9ms TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:18:35,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3324 states. [2021-06-05 21:18:35,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3324 to 2411. [2021-06-05 21:18:35,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2411 states, 2410 states have (on average 2.85850622406639) internal successors, (6889), 2410 states have internal predecessors, (6889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:35,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2411 states to 2411 states and 6889 transitions. [2021-06-05 21:18:35,908 INFO L78 Accepts]: Start accepts. Automaton has 2411 states and 6889 transitions. Word has length 20 [2021-06-05 21:18:35,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:35,908 INFO L482 AbstractCegarLoop]: Abstraction has 2411 states and 6889 transitions. [2021-06-05 21:18:35,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:35,908 INFO L276 IsEmpty]: Start isEmpty. Operand 2411 states and 6889 transitions. [2021-06-05 21:18:35,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:18:35,911 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:35,911 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:36,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable627,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:36,132 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:36,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:36,133 INFO L82 PathProgramCache]: Analyzing trace with hash 911586597, now seen corresponding path program 186 times [2021-06-05 21:18:36,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:36,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513014954] [2021-06-05 21:18:36,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:36,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:36,214 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:36,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:36,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513014954] [2021-06-05 21:18:36,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513014954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:36,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757908566] [2021-06-05 21:18:36,215 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:36,244 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:18:36,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:36,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:18:36,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:36,306 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:36,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757908566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:36,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:36,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 16 [2021-06-05 21:18:36,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15764161] [2021-06-05 21:18:36,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:18:36,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:36,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:18:36,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:18:36,307 INFO L87 Difference]: Start difference. First operand 2411 states and 6889 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:36,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:36,473 INFO L93 Difference]: Finished difference Result 3194 states and 8791 transitions. [2021-06-05 21:18:36,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:18:36,473 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:18:36,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:36,476 INFO L225 Difference]: With dead ends: 3194 [2021-06-05 21:18:36,476 INFO L226 Difference]: Without dead ends: 3184 [2021-06-05 21:18:36,477 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 181.3ms TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:18:36,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3184 states. [2021-06-05 21:18:36,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3184 to 2411. [2021-06-05 21:18:36,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2411 states, 2410 states have (on average 2.857676348547718) internal successors, (6887), 2410 states have internal predecessors, (6887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:36,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2411 states to 2411 states and 6887 transitions. [2021-06-05 21:18:36,505 INFO L78 Accepts]: Start accepts. Automaton has 2411 states and 6887 transitions. Word has length 20 [2021-06-05 21:18:36,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:36,505 INFO L482 AbstractCegarLoop]: Abstraction has 2411 states and 6887 transitions. [2021-06-05 21:18:36,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:36,505 INFO L276 IsEmpty]: Start isEmpty. Operand 2411 states and 6887 transitions. [2021-06-05 21:18:36,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:18:36,507 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:36,507 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:36,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable628 [2021-06-05 21:18:36,708 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:36,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:36,708 INFO L82 PathProgramCache]: Analyzing trace with hash 66615145, now seen corresponding path program 187 times [2021-06-05 21:18:36,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:36,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514007152] [2021-06-05 21:18:36,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:36,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:36,778 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:36,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:36,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514007152] [2021-06-05 21:18:36,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514007152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:36,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678955936] [2021-06-05 21:18:36,779 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:36,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:36,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:18:36,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:36,881 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:36,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678955936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:36,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:36,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2021-06-05 21:18:36,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707129825] [2021-06-05 21:18:36,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:18:36,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:36,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:18:36,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:18:36,882 INFO L87 Difference]: Start difference. First operand 2411 states and 6887 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:37,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:37,088 INFO L93 Difference]: Finished difference Result 3215 states and 8812 transitions. [2021-06-05 21:18:37,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:18:37,088 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:18:37,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:37,093 INFO L225 Difference]: With dead ends: 3215 [2021-06-05 21:18:37,093 INFO L226 Difference]: Without dead ends: 3203 [2021-06-05 21:18:37,093 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 192.2ms TimeCoverageRelationStatistics Valid=213, Invalid=543, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:18:37,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3203 states. [2021-06-05 21:18:37,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3203 to 2417. [2021-06-05 21:18:37,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 2.857201986754967) internal successors, (6903), 2416 states have internal predecessors, (6903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:37,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 6903 transitions. [2021-06-05 21:18:37,134 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 6903 transitions. Word has length 20 [2021-06-05 21:18:37,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:37,135 INFO L482 AbstractCegarLoop]: Abstraction has 2417 states and 6903 transitions. [2021-06-05 21:18:37,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:37,135 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 6903 transitions. [2021-06-05 21:18:37,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 21:18:37,138 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:37,138 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:37,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable629,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:37,362 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:37,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:37,362 INFO L82 PathProgramCache]: Analyzing trace with hash -357696091, now seen corresponding path program 188 times [2021-06-05 21:18:37,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:37,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922467433] [2021-06-05 21:18:37,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:37,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:37,438 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:37,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:37,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922467433] [2021-06-05 21:18:37,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922467433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:37,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635240544] [2021-06-05 21:18:37,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:37,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:18:37,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:37,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:18:37,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:37,540 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 35 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:37,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635240544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:37,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:37,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 18 [2021-06-05 21:18:37,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139947357] [2021-06-05 21:18:37,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:18:37,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:37,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:18:37,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:18:37,541 INFO L87 Difference]: Start difference. First operand 2417 states and 6903 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:37,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:37,703 INFO L93 Difference]: Finished difference Result 2609 states and 7349 transitions. [2021-06-05 21:18:37,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:18:37,703 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 21:18:37,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:37,706 INFO L225 Difference]: With dead ends: 2609 [2021-06-05 21:18:37,706 INFO L226 Difference]: Without dead ends: 2602 [2021-06-05 21:18:37,706 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 193.5ms TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:18:37,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2602 states. [2021-06-05 21:18:37,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2602 to 2417. [2021-06-05 21:18:37,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 2.8567880794701987) internal successors, (6902), 2416 states have internal predecessors, (6902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:37,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 6902 transitions. [2021-06-05 21:18:37,732 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 6902 transitions. Word has length 20 [2021-06-05 21:18:37,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:37,732 INFO L482 AbstractCegarLoop]: Abstraction has 2417 states and 6902 transitions. [2021-06-05 21:18:37,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:37,732 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 6902 transitions. [2021-06-05 21:18:37,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:18:37,735 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:37,735 INFO L554 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:37,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable630 [2021-06-05 21:18:37,945 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:37,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:37,945 INFO L82 PathProgramCache]: Analyzing trace with hash 208179366, now seen corresponding path program 189 times [2021-06-05 21:18:37,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:37,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31718836] [2021-06-05 21:18:37,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:37,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:37,996 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:37,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:37,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31718836] [2021-06-05 21:18:37,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31718836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:37,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816886525] [2021-06-05 21:18:37,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:38,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:18:38,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:38,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:18:38,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:38,292 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:18:38,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 21:18:39,400 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 475 DAG size of output: 373 [2021-06-05 21:18:39,577 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 475 DAG size of output: 373 [2021-06-05 21:18:39,767 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 486 DAG size of output: 384 [2021-06-05 21:18:40,076 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 477 [2021-06-05 21:18:40,974 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 258 DAG size of output: 357 [2021-06-05 21:18:41,095 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 278 [2021-06-05 21:18:41,234 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 261 [2021-06-05 21:18:42,252 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 495 DAG size of output: 289 [2021-06-05 21:18:42,381 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 502 DAG size of output: 290 [2021-06-05 21:18:42,601 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 647 DAG size of output: 412 [2021-06-05 21:18:42,989 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 859 DAG size of output: 552 [2021-06-05 21:18:43,605 WARN L205 SmtUtils]: Spent 611.00 ms on a formula simplification. DAG size of input: 1137 DAG size of output: 709 [2021-06-05 21:18:44,151 WARN L205 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 1137 DAG size of output: 709 [2021-06-05 21:18:44,740 WARN L205 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 1142 DAG size of output: 714 [2021-06-05 21:18:45,557 WARN L205 SmtUtils]: Spent 813.00 ms on a formula simplification. DAG size of input: 716 DAG size of output: 705 [2021-06-05 21:18:45,868 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 413 DAG size of output: 442 [2021-06-05 21:18:46,635 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 480 DAG size of output: 220 [2021-06-05 21:18:46,859 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 483 DAG size of output: 224 [2021-06-05 21:18:47,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:18:47,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:18:47,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:18:47,071 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 21:18:47,076 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:47,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816886525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:47,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:47,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-06-05 21:18:47,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843136006] [2021-06-05 21:18:47,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:18:47,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:47,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:18:47,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:18:47,077 INFO L87 Difference]: Start difference. First operand 2417 states and 6902 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:47,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:47,302 INFO L93 Difference]: Finished difference Result 2595 states and 7261 transitions. [2021-06-05 21:18:47,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:18:47,302 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:18:47,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:47,305 INFO L225 Difference]: With dead ends: 2595 [2021-06-05 21:18:47,305 INFO L226 Difference]: Without dead ends: 2592 [2021-06-05 21:18:47,306 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 189.8ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:18:47,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2592 states. [2021-06-05 21:18:47,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2592 to 2489. [2021-06-05 21:18:47,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2489 states, 2488 states have (on average 2.8589228295819935) internal successors, (7113), 2488 states have internal predecessors, (7113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:47,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2489 states to 2489 states and 7113 transitions. [2021-06-05 21:18:47,331 INFO L78 Accepts]: Start accepts. Automaton has 2489 states and 7113 transitions. Word has length 21 [2021-06-05 21:18:47,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:47,331 INFO L482 AbstractCegarLoop]: Abstraction has 2489 states and 7113 transitions. [2021-06-05 21:18:47,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:47,331 INFO L276 IsEmpty]: Start isEmpty. Operand 2489 states and 7113 transitions. [2021-06-05 21:18:47,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:18:47,333 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:47,333 INFO L554 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:47,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable631 [2021-06-05 21:18:47,534 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:47,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:47,534 INFO L82 PathProgramCache]: Analyzing trace with hash -120892348, now seen corresponding path program 190 times [2021-06-05 21:18:47,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:47,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534596430] [2021-06-05 21:18:47,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:47,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:47,588 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:47,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:47,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534596430] [2021-06-05 21:18:47,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534596430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:47,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966428851] [2021-06-05 21:18:47,588 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:47,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:18:47,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:47,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:18:47,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:47,879 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:18:47,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 21:18:49,483 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:18:49,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:18:49,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:18:49,485 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 21:18:49,490 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:49,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966428851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:49,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:49,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-06-05 21:18:49,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662332002] [2021-06-05 21:18:49,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:18:49,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:49,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:18:49,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:18:49,491 INFO L87 Difference]: Start difference. First operand 2489 states and 7113 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:49,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:49,710 INFO L93 Difference]: Finished difference Result 2702 states and 7537 transitions. [2021-06-05 21:18:49,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:18:49,710 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:18:49,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:49,713 INFO L225 Difference]: With dead ends: 2702 [2021-06-05 21:18:49,713 INFO L226 Difference]: Without dead ends: 2699 [2021-06-05 21:18:49,713 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 188.0ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:18:49,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2699 states. [2021-06-05 21:18:49,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2699 to 2548. [2021-06-05 21:18:49,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2548 states, 2547 states have (on average 2.8696505692972125) internal successors, (7309), 2547 states have internal predecessors, (7309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:49,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2548 states to 2548 states and 7309 transitions. [2021-06-05 21:18:49,738 INFO L78 Accepts]: Start accepts. Automaton has 2548 states and 7309 transitions. Word has length 21 [2021-06-05 21:18:49,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:49,738 INFO L482 AbstractCegarLoop]: Abstraction has 2548 states and 7309 transitions. [2021-06-05 21:18:49,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:49,738 INFO L276 IsEmpty]: Start isEmpty. Operand 2548 states and 7309 transitions. [2021-06-05 21:18:49,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:18:49,740 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:49,740 INFO L554 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:49,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1211 [2021-06-05 21:18:49,941 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:49,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:49,941 INFO L82 PathProgramCache]: Analyzing trace with hash 670459314, now seen corresponding path program 191 times [2021-06-05 21:18:49,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:49,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447344909] [2021-06-05 21:18:49,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:49,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:49,990 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:18:49,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:49,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447344909] [2021-06-05 21:18:49,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447344909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:49,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543425532] [2021-06-05 21:18:49,990 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:50,021 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:18:50,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:50,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:18:50,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:50,320 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:18:50,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 21:18:51,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:18:51,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:18:51,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:18:51,613 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 21:18:51,618 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:51,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543425532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:51,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:51,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-06-05 21:18:51,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281436028] [2021-06-05 21:18:51,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:18:51,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:51,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:18:51,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:18:51,619 INFO L87 Difference]: Start difference. First operand 2548 states and 7309 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:51,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:51,812 INFO L93 Difference]: Finished difference Result 2762 states and 7744 transitions. [2021-06-05 21:18:51,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:18:51,812 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:18:51,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:51,815 INFO L225 Difference]: With dead ends: 2762 [2021-06-05 21:18:51,815 INFO L226 Difference]: Without dead ends: 2759 [2021-06-05 21:18:51,816 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 219.2ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:18:51,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2759 states. [2021-06-05 21:18:51,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2759 to 2605. [2021-06-05 21:18:51,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2605 states, 2604 states have (on average 2.883640552995392) internal successors, (7509), 2604 states have internal predecessors, (7509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:51,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2605 states to 2605 states and 7509 transitions. [2021-06-05 21:18:51,840 INFO L78 Accepts]: Start accepts. Automaton has 2605 states and 7509 transitions. Word has length 21 [2021-06-05 21:18:51,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:51,840 INFO L482 AbstractCegarLoop]: Abstraction has 2605 states and 7509 transitions. [2021-06-05 21:18:51,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:51,840 INFO L276 IsEmpty]: Start isEmpty. Operand 2605 states and 7509 transitions. [2021-06-05 21:18:51,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:18:51,842 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:51,842 INFO L554 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:52,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1386 [2021-06-05 21:18:52,042 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:52,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:52,043 INFO L82 PathProgramCache]: Analyzing trace with hash -567442940, now seen corresponding path program 192 times [2021-06-05 21:18:52,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:52,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428092943] [2021-06-05 21:18:52,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:52,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:52,091 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:52,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:52,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428092943] [2021-06-05 21:18:52,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428092943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:52,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457345073] [2021-06-05 21:18:52,092 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:52,116 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:18:52,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:52,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:18:52,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:52,385 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:18:52,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 21:18:54,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:18:54,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:18:54,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:18:54,009 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 21:18:54,015 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:54,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457345073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:54,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:54,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-06-05 21:18:54,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830016976] [2021-06-05 21:18:54,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:18:54,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:54,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:18:54,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:18:54,015 INFO L87 Difference]: Start difference. First operand 2605 states and 7509 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:54,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:54,269 INFO L93 Difference]: Finished difference Result 2824 states and 7965 transitions. [2021-06-05 21:18:54,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:18:54,269 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:18:54,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:54,272 INFO L225 Difference]: With dead ends: 2824 [2021-06-05 21:18:54,273 INFO L226 Difference]: Without dead ends: 2821 [2021-06-05 21:18:54,273 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 186.5ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:18:54,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2821 states. [2021-06-05 21:18:54,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2821 to 2666. [2021-06-05 21:18:54,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2666 states, 2665 states have (on average 2.900187617260788) internal successors, (7729), 2665 states have internal predecessors, (7729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:54,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2666 states to 2666 states and 7729 transitions. [2021-06-05 21:18:54,304 INFO L78 Accepts]: Start accepts. Automaton has 2666 states and 7729 transitions. Word has length 21 [2021-06-05 21:18:54,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:54,304 INFO L482 AbstractCegarLoop]: Abstraction has 2666 states and 7729 transitions. [2021-06-05 21:18:54,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:54,304 INFO L276 IsEmpty]: Start isEmpty. Operand 2666 states and 7729 transitions. [2021-06-05 21:18:54,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:18:54,307 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:54,307 INFO L554 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:54,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1582,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:54,507 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:54,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:54,507 INFO L82 PathProgramCache]: Analyzing trace with hash -287707150, now seen corresponding path program 193 times [2021-06-05 21:18:54,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:54,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617044131] [2021-06-05 21:18:54,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:54,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:54,555 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:18:54,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:54,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617044131] [2021-06-05 21:18:54,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617044131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:54,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742219413] [2021-06-05 21:18:54,555 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:54,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:54,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:18:54,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:54,844 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:18:54,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 21:18:55,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:18:55,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:18:55,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:18:55,853 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 21:18:55,860 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:55,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742219413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:55,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:55,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-06-05 21:18:55,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826644604] [2021-06-05 21:18:55,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:18:55,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:55,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:18:55,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:18:55,860 INFO L87 Difference]: Start difference. First operand 2666 states and 7729 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:56,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:56,053 INFO L93 Difference]: Finished difference Result 2927 states and 8298 transitions. [2021-06-05 21:18:56,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:18:56,053 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:18:56,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:56,057 INFO L225 Difference]: With dead ends: 2927 [2021-06-05 21:18:56,058 INFO L226 Difference]: Without dead ends: 2924 [2021-06-05 21:18:56,058 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 183.5ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:18:56,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2924 states. [2021-06-05 21:18:56,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2924 to 2756. [2021-06-05 21:18:56,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2756 states, 2755 states have (on average 2.9219600725952812) internal successors, (8050), 2755 states have internal predecessors, (8050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:56,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2756 states to 2756 states and 8050 transitions. [2021-06-05 21:18:56,102 INFO L78 Accepts]: Start accepts. Automaton has 2756 states and 8050 transitions. Word has length 21 [2021-06-05 21:18:56,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:56,102 INFO L482 AbstractCegarLoop]: Abstraction has 2756 states and 8050 transitions. [2021-06-05 21:18:56,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:56,102 INFO L276 IsEmpty]: Start isEmpty. Operand 2756 states and 8050 transitions. [2021-06-05 21:18:56,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:18:56,105 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:56,105 INFO L554 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:56,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1894 [2021-06-05 21:18:56,320 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:56,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:56,321 INFO L82 PathProgramCache]: Analyzing trace with hash -205832252, now seen corresponding path program 194 times [2021-06-05 21:18:56,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:56,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989881108] [2021-06-05 21:18:56,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:56,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:56,368 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:56,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:56,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989881108] [2021-06-05 21:18:56,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989881108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:56,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303215643] [2021-06-05 21:18:56,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:56,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:18:56,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:56,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:18:56,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:56,656 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:18:56,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 21:18:57,545 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:18:57,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:18:57,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:18:57,547 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 21:18:57,554 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:57,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303215643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:57,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:57,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-06-05 21:18:57,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927507488] [2021-06-05 21:18:57,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:18:57,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:57,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:18:57,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:18:57,555 INFO L87 Difference]: Start difference. First operand 2756 states and 8050 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:57,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:57,889 INFO L93 Difference]: Finished difference Result 3020 states and 8621 transitions. [2021-06-05 21:18:57,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:18:57,889 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:18:57,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:57,893 INFO L225 Difference]: With dead ends: 3020 [2021-06-05 21:18:57,893 INFO L226 Difference]: Without dead ends: 3017 [2021-06-05 21:18:57,893 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 184.3ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:18:57,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3017 states. [2021-06-05 21:18:57,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3017 to 2845. [2021-06-05 21:18:57,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2845 states, 2844 states have (on average 2.9433895921237694) internal successors, (8371), 2844 states have internal predecessors, (8371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:57,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2845 states to 2845 states and 8371 transitions. [2021-06-05 21:18:57,920 INFO L78 Accepts]: Start accepts. Automaton has 2845 states and 8371 transitions. Word has length 21 [2021-06-05 21:18:57,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:57,920 INFO L482 AbstractCegarLoop]: Abstraction has 2845 states and 8371 transitions. [2021-06-05 21:18:57,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:57,920 INFO L276 IsEmpty]: Start isEmpty. Operand 2845 states and 8371 transitions. [2021-06-05 21:18:57,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:18:57,923 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:57,923 INFO L554 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:58,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2060,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:58,123 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:58,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:58,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1962677710, now seen corresponding path program 195 times [2021-06-05 21:18:58,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:58,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668629994] [2021-06-05 21:18:58,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:58,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:58,171 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:18:58,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:58,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668629994] [2021-06-05 21:18:58,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668629994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:58,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277920582] [2021-06-05 21:18:58,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:58,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:18:58,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:58,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:18:58,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:58,468 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:18:58,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 21:18:59,217 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 329 [2021-06-05 21:18:59,344 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 368 [2021-06-05 21:18:59,540 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 431 [2021-06-05 21:18:59,700 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 410 [2021-06-05 21:19:00,128 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 305 [2021-06-05 21:19:00,248 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 305 [2021-06-05 21:19:00,404 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 422 DAG size of output: 312 [2021-06-05 21:19:00,801 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:19:00,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:19:00,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:19:00,802 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 21:19:00,808 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:00,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277920582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:00,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:00,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-06-05 21:19:00,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864601805] [2021-06-05 21:19:00,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:19:00,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:00,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:19:00,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:19:00,809 INFO L87 Difference]: Start difference. First operand 2845 states and 8371 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:01,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:01,026 INFO L93 Difference]: Finished difference Result 3164 states and 9122 transitions. [2021-06-05 21:19:01,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:19:01,026 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:19:01,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:01,030 INFO L225 Difference]: With dead ends: 3164 [2021-06-05 21:19:01,030 INFO L226 Difference]: Without dead ends: 3161 [2021-06-05 21:19:01,030 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 188.5ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:19:01,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3161 states. [2021-06-05 21:19:01,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3161 to 3004. [2021-06-05 21:19:01,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3004 states, 3003 states have (on average 2.965700965700966) internal successors, (8906), 3003 states have internal predecessors, (8906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:01,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3004 states to 3004 states and 8906 transitions. [2021-06-05 21:19:01,064 INFO L78 Accepts]: Start accepts. Automaton has 3004 states and 8906 transitions. Word has length 21 [2021-06-05 21:19:01,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:01,064 INFO L482 AbstractCegarLoop]: Abstraction has 3004 states and 8906 transitions. [2021-06-05 21:19:01,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:01,064 INFO L276 IsEmpty]: Start isEmpty. Operand 3004 states and 8906 transitions. [2021-06-05 21:19:01,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:19:01,066 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:01,066 INFO L554 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:01,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2227 [2021-06-05 21:19:01,267 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:01,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:01,267 INFO L82 PathProgramCache]: Analyzing trace with hash -590312060, now seen corresponding path program 196 times [2021-06-05 21:19:01,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:01,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418730270] [2021-06-05 21:19:01,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:01,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:01,314 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:19:01,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:01,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418730270] [2021-06-05 21:19:01,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418730270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:01,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406700058] [2021-06-05 21:19:01,314 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:01,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:19:01,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:01,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:19:01,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:01,601 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:19:01,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 21:19:02,607 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 244 [2021-06-05 21:19:02,721 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 244 [2021-06-05 21:19:02,870 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 249 [2021-06-05 21:19:03,005 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 333 [2021-06-05 21:19:03,190 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 302 [2021-06-05 21:19:03,789 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:19:03,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:19:03,790 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:19:03,790 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 21:19:03,796 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:03,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406700058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:03,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:03,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-06-05 21:19:03,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299384327] [2021-06-05 21:19:03,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:19:03,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:03,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:19:03,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:19:03,797 INFO L87 Difference]: Start difference. First operand 3004 states and 8906 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:04,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:04,110 INFO L93 Difference]: Finished difference Result 3650 states and 10596 transitions. [2021-06-05 21:19:04,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:19:04,111 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:19:04,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:04,116 INFO L225 Difference]: With dead ends: 3650 [2021-06-05 21:19:04,116 INFO L226 Difference]: Without dead ends: 3647 [2021-06-05 21:19:04,116 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 185.6ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:19:04,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3647 states. [2021-06-05 21:19:04,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3647 to 3491. [2021-06-05 21:19:04,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3491 states, 3490 states have (on average 2.9773638968481375) internal successors, (10391), 3490 states have internal predecessors, (10391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:04,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3491 states to 3491 states and 10391 transitions. [2021-06-05 21:19:04,165 INFO L78 Accepts]: Start accepts. Automaton has 3491 states and 10391 transitions. Word has length 21 [2021-06-05 21:19:04,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:04,165 INFO L482 AbstractCegarLoop]: Abstraction has 3491 states and 10391 transitions. [2021-06-05 21:19:04,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:04,165 INFO L276 IsEmpty]: Start isEmpty. Operand 3491 states and 10391 transitions. [2021-06-05 21:19:04,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:19:04,168 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:04,168 INFO L554 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:04,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2467 [2021-06-05 21:19:04,369 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:04,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:04,369 INFO L82 PathProgramCache]: Analyzing trace with hash -996649870, now seen corresponding path program 197 times [2021-06-05 21:19:04,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:04,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91827751] [2021-06-05 21:19:04,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:04,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:04,417 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:19:04,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:04,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91827751] [2021-06-05 21:19:04,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91827751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:04,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689170253] [2021-06-05 21:19:04,418 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:04,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:19:04,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:04,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 21:19:04,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:04,706 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:19:04,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 21:19:05,795 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 225 [2021-06-05 21:19:05,940 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 291 [2021-06-05 21:19:06,088 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 291 [2021-06-05 21:19:06,286 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 298 [2021-06-05 21:19:06,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:19:06,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:19:06,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:19:06,793 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 21:19:06,798 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:06,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689170253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:06,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:06,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-06-05 21:19:06,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230689729] [2021-06-05 21:19:06,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:19:06,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:06,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:19:06,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:19:06,799 INFO L87 Difference]: Start difference. First operand 3491 states and 10391 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:07,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:07,048 INFO L93 Difference]: Finished difference Result 4057 states and 11844 transitions. [2021-06-05 21:19:07,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:19:07,049 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:19:07,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:07,054 INFO L225 Difference]: With dead ends: 4057 [2021-06-05 21:19:07,054 INFO L226 Difference]: Without dead ends: 4054 [2021-06-05 21:19:07,054 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 188.1ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:19:07,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4054 states. [2021-06-05 21:19:07,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4054 to 3906. [2021-06-05 21:19:07,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3906 states, 3905 states have (on average 2.9836107554417413) internal successors, (11651), 3905 states have internal predecessors, (11651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:07,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3906 states to 3906 states and 11651 transitions. [2021-06-05 21:19:07,102 INFO L78 Accepts]: Start accepts. Automaton has 3906 states and 11651 transitions. Word has length 21 [2021-06-05 21:19:07,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:07,102 INFO L482 AbstractCegarLoop]: Abstraction has 3906 states and 11651 transitions. [2021-06-05 21:19:07,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:07,103 INFO L276 IsEmpty]: Start isEmpty. Operand 3906 states and 11651 transitions. [2021-06-05 21:19:07,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:07,106 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:07,107 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:07,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2674,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:07,307 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:07,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:07,307 INFO L82 PathProgramCache]: Analyzing trace with hash -836665722, now seen corresponding path program 198 times [2021-06-05 21:19:07,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:07,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116418944] [2021-06-05 21:19:07,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:07,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:07,391 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 28 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:07,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:07,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116418944] [2021-06-05 21:19:07,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116418944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:07,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414627157] [2021-06-05 21:19:07,391 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:07,415 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:19:07,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:07,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:07,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:07,460 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 36 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:07,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414627157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:07,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:07,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:19:07,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981383947] [2021-06-05 21:19:07,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:19:07,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:07,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:19:07,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:19:07,461 INFO L87 Difference]: Start difference. First operand 3906 states and 11651 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:07,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:07,641 INFO L93 Difference]: Finished difference Result 4087 states and 11914 transitions. [2021-06-05 21:19:07,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:19:07,641 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:07,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:07,646 INFO L225 Difference]: With dead ends: 4087 [2021-06-05 21:19:07,646 INFO L226 Difference]: Without dead ends: 4087 [2021-06-05 21:19:07,646 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 173.9ms TimeCoverageRelationStatistics Valid=286, Invalid=584, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:19:07,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4087 states. [2021-06-05 21:19:07,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4087 to 3867. [2021-06-05 21:19:07,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3867 states, 3866 states have (on average 2.982152095188826) internal successors, (11529), 3866 states have internal predecessors, (11529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:07,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3867 states to 3867 states and 11529 transitions. [2021-06-05 21:19:07,693 INFO L78 Accepts]: Start accepts. Automaton has 3867 states and 11529 transitions. Word has length 22 [2021-06-05 21:19:07,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:07,693 INFO L482 AbstractCegarLoop]: Abstraction has 3867 states and 11529 transitions. [2021-06-05 21:19:07,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:07,694 INFO L276 IsEmpty]: Start isEmpty. Operand 3867 states and 11529 transitions. [2021-06-05 21:19:07,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:07,697 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:07,697 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:07,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2911 [2021-06-05 21:19:07,898 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:07,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:07,898 INFO L82 PathProgramCache]: Analyzing trace with hash -2113302545, now seen corresponding path program 199 times [2021-06-05 21:19:07,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:07,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521783255] [2021-06-05 21:19:07,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:07,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:07,981 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:07,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:07,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521783255] [2021-06-05 21:19:07,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521783255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:07,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467789993] [2021-06-05 21:19:07,981 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:08,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:08,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:08,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:08,071 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:08,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467789993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:08,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:08,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:19:08,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257608742] [2021-06-05 21:19:08,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:19:08,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:08,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:19:08,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:19:08,072 INFO L87 Difference]: Start difference. First operand 3867 states and 11529 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:08,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:08,314 INFO L93 Difference]: Finished difference Result 4251 states and 12125 transitions. [2021-06-05 21:19:08,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:19:08,315 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:08,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:08,319 INFO L225 Difference]: With dead ends: 4251 [2021-06-05 21:19:08,319 INFO L226 Difference]: Without dead ends: 4240 [2021-06-05 21:19:08,319 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 207.3ms TimeCoverageRelationStatistics Valid=374, Invalid=748, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:19:08,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4240 states. [2021-06-05 21:19:08,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4240 to 3890. [2021-06-05 21:19:08,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3890 states, 3889 states have (on average 2.978657752635639) internal successors, (11584), 3889 states have internal predecessors, (11584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:08,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3890 states to 3890 states and 11584 transitions. [2021-06-05 21:19:08,368 INFO L78 Accepts]: Start accepts. Automaton has 3890 states and 11584 transitions. Word has length 22 [2021-06-05 21:19:08,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:08,368 INFO L482 AbstractCegarLoop]: Abstraction has 3890 states and 11584 transitions. [2021-06-05 21:19:08,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:08,368 INFO L276 IsEmpty]: Start isEmpty. Operand 3890 states and 11584 transitions. [2021-06-05 21:19:08,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:08,372 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:08,372 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:08,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2912,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:08,572 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:08,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:08,573 INFO L82 PathProgramCache]: Analyzing trace with hash 579717254, now seen corresponding path program 200 times [2021-06-05 21:19:08,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:08,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931233993] [2021-06-05 21:19:08,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:08,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:08,629 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:08,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:08,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931233993] [2021-06-05 21:19:08,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931233993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:08,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783061046] [2021-06-05 21:19:08,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:08,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:19:08,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:08,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:08,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:08,686 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 37 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:08,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783061046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:08,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:08,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:19:08,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043559476] [2021-06-05 21:19:08,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:19:08,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:08,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:19:08,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:19:08,687 INFO L87 Difference]: Start difference. First operand 3890 states and 11584 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:08,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:08,831 INFO L93 Difference]: Finished difference Result 3929 states and 11639 transitions. [2021-06-05 21:19:08,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:19:08,832 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:08,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:08,836 INFO L225 Difference]: With dead ends: 3929 [2021-06-05 21:19:08,836 INFO L226 Difference]: Without dead ends: 3928 [2021-06-05 21:19:08,837 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 95.9ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:19:08,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3928 states. [2021-06-05 21:19:08,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3928 to 3890. [2021-06-05 21:19:08,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3890 states, 3889 states have (on average 2.978143481614811) internal successors, (11582), 3889 states have internal predecessors, (11582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:08,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3890 states to 3890 states and 11582 transitions. [2021-06-05 21:19:08,882 INFO L78 Accepts]: Start accepts. Automaton has 3890 states and 11582 transitions. Word has length 22 [2021-06-05 21:19:08,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:08,882 INFO L482 AbstractCegarLoop]: Abstraction has 3890 states and 11582 transitions. [2021-06-05 21:19:08,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:08,882 INFO L276 IsEmpty]: Start isEmpty. Operand 3890 states and 11582 transitions. [2021-06-05 21:19:08,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:08,886 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:08,886 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:09,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2913,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:09,087 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:09,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:09,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1496773607, now seen corresponding path program 201 times [2021-06-05 21:19:09,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:09,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715184426] [2021-06-05 21:19:09,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:09,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:09,151 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:09,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:09,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715184426] [2021-06-05 21:19:09,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715184426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:09,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845403337] [2021-06-05 21:19:09,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:09,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:19:09,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:09,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:09,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:09,216 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:09,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845403337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:09,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:09,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:19:09,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146221052] [2021-06-05 21:19:09,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:19:09,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:09,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:19:09,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:19:09,217 INFO L87 Difference]: Start difference. First operand 3890 states and 11582 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:09,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:09,283 INFO L93 Difference]: Finished difference Result 4355 states and 12410 transitions. [2021-06-05 21:19:09,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:19:09,283 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:09,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:09,288 INFO L225 Difference]: With dead ends: 4355 [2021-06-05 21:19:09,288 INFO L226 Difference]: Without dead ends: 4355 [2021-06-05 21:19:09,288 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 57.6ms TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:19:09,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4355 states. [2021-06-05 21:19:09,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4355 to 3867. [2021-06-05 21:19:09,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3867 states, 3866 states have (on average 2.9733574754267975) internal successors, (11495), 3866 states have internal predecessors, (11495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:09,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3867 states to 3867 states and 11495 transitions. [2021-06-05 21:19:09,335 INFO L78 Accepts]: Start accepts. Automaton has 3867 states and 11495 transitions. Word has length 22 [2021-06-05 21:19:09,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:09,335 INFO L482 AbstractCegarLoop]: Abstraction has 3867 states and 11495 transitions. [2021-06-05 21:19:09,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:09,335 INFO L276 IsEmpty]: Start isEmpty. Operand 3867 states and 11495 transitions. [2021-06-05 21:19:09,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:09,339 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:09,339 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:09,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2914,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:09,539 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:09,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:09,539 INFO L82 PathProgramCache]: Analyzing trace with hash -374385774, now seen corresponding path program 202 times [2021-06-05 21:19:09,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:09,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204992360] [2021-06-05 21:19:09,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:09,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:09,594 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:09,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:09,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204992360] [2021-06-05 21:19:09,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204992360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:09,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655232401] [2021-06-05 21:19:09,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:09,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:19:09,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:09,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:09,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:09,656 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:19:09,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655232401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:09,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:09,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:19:09,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962950771] [2021-06-05 21:19:09,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:19:09,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:09,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:19:09,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:19:09,657 INFO L87 Difference]: Start difference. First operand 3867 states and 11495 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:09,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:09,768 INFO L93 Difference]: Finished difference Result 4245 states and 12197 transitions. [2021-06-05 21:19:09,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:19:09,768 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:09,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:09,773 INFO L225 Difference]: With dead ends: 4245 [2021-06-05 21:19:09,773 INFO L226 Difference]: Without dead ends: 4245 [2021-06-05 21:19:09,773 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 89.6ms TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:19:09,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4245 states. [2021-06-05 21:19:09,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4245 to 3908. [2021-06-05 21:19:09,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3908 states, 3907 states have (on average 2.975172766828769) internal successors, (11624), 3907 states have internal predecessors, (11624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:09,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3908 states to 3908 states and 11624 transitions. [2021-06-05 21:19:09,823 INFO L78 Accepts]: Start accepts. Automaton has 3908 states and 11624 transitions. Word has length 22 [2021-06-05 21:19:09,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:09,824 INFO L482 AbstractCegarLoop]: Abstraction has 3908 states and 11624 transitions. [2021-06-05 21:19:09,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:09,824 INFO L276 IsEmpty]: Start isEmpty. Operand 3908 states and 11624 transitions. [2021-06-05 21:19:09,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:09,828 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:09,828 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:10,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2915,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:10,028 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:10,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:10,028 INFO L82 PathProgramCache]: Analyzing trace with hash 570376209, now seen corresponding path program 203 times [2021-06-05 21:19:10,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:10,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488451836] [2021-06-05 21:19:10,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:10,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:10,080 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:10,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:10,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488451836] [2021-06-05 21:19:10,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488451836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:10,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463759996] [2021-06-05 21:19:10,080 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:10,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:19:10,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:10,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:10,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:10,139 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:19:10,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463759996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:10,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:10,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:19:10,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444910843] [2021-06-05 21:19:10,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:19:10,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:10,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:19:10,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:19:10,139 INFO L87 Difference]: Start difference. First operand 3908 states and 11624 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:10,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:10,279 INFO L93 Difference]: Finished difference Result 4249 states and 12137 transitions. [2021-06-05 21:19:10,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:19:10,280 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:10,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:10,283 INFO L225 Difference]: With dead ends: 4249 [2021-06-05 21:19:10,283 INFO L226 Difference]: Without dead ends: 4247 [2021-06-05 21:19:10,283 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 101.5ms TimeCoverageRelationStatistics Valid=175, Invalid=287, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:19:10,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4247 states. [2021-06-05 21:19:10,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4247 to 3918. [2021-06-05 21:19:10,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3918 states, 3917 states have (on average 2.976257339800868) internal successors, (11658), 3917 states have internal predecessors, (11658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:10,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3918 states to 3918 states and 11658 transitions. [2021-06-05 21:19:10,330 INFO L78 Accepts]: Start accepts. Automaton has 3918 states and 11658 transitions. Word has length 22 [2021-06-05 21:19:10,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:10,330 INFO L482 AbstractCegarLoop]: Abstraction has 3918 states and 11658 transitions. [2021-06-05 21:19:10,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:10,330 INFO L276 IsEmpty]: Start isEmpty. Operand 3918 states and 11658 transitions. [2021-06-05 21:19:10,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:10,334 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:10,334 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:10,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2916,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:10,534 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:10,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:10,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1371068916, now seen corresponding path program 204 times [2021-06-05 21:19:10,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:10,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862482837] [2021-06-05 21:19:10,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:10,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:10,587 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:10,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:10,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862482837] [2021-06-05 21:19:10,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862482837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:10,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653225146] [2021-06-05 21:19:10,587 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:10,613 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:19:10,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:10,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:10,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:10,646 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:10,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653225146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:10,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:10,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:19:10,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895055374] [2021-06-05 21:19:10,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:19:10,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:10,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:19:10,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:19:10,647 INFO L87 Difference]: Start difference. First operand 3918 states and 11658 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:10,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:10,792 INFO L93 Difference]: Finished difference Result 4124 states and 11966 transitions. [2021-06-05 21:19:10,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:19:10,792 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:10,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:10,797 INFO L225 Difference]: With dead ends: 4124 [2021-06-05 21:19:10,797 INFO L226 Difference]: Without dead ends: 4122 [2021-06-05 21:19:10,797 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 98.4ms TimeCoverageRelationStatistics Valid=169, Invalid=293, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:19:10,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4122 states. [2021-06-05 21:19:10,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4122 to 3900. [2021-06-05 21:19:10,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3900 states, 3899 states have (on average 2.9746088740702743) internal successors, (11598), 3899 states have internal predecessors, (11598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:10,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3900 states to 3900 states and 11598 transitions. [2021-06-05 21:19:10,843 INFO L78 Accepts]: Start accepts. Automaton has 3900 states and 11598 transitions. Word has length 22 [2021-06-05 21:19:10,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:10,844 INFO L482 AbstractCegarLoop]: Abstraction has 3900 states and 11598 transitions. [2021-06-05 21:19:10,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:10,844 INFO L276 IsEmpty]: Start isEmpty. Operand 3900 states and 11598 transitions. [2021-06-05 21:19:10,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:10,847 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:10,847 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:11,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2917,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:11,047 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:11,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:11,048 INFO L82 PathProgramCache]: Analyzing trace with hash -2006842027, now seen corresponding path program 205 times [2021-06-05 21:19:11,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:11,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158656521] [2021-06-05 21:19:11,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:11,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:11,099 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:11,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:11,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158656521] [2021-06-05 21:19:11,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158656521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:11,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239062415] [2021-06-05 21:19:11,100 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:11,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:11,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:11,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:11,160 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:11,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239062415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:11,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:11,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:19:11,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745939175] [2021-06-05 21:19:11,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:19:11,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:11,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:19:11,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:19:11,161 INFO L87 Difference]: Start difference. First operand 3900 states and 11598 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:11,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:11,224 INFO L93 Difference]: Finished difference Result 4352 states and 12338 transitions. [2021-06-05 21:19:11,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:19:11,224 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:11,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:11,228 INFO L225 Difference]: With dead ends: 4352 [2021-06-05 21:19:11,228 INFO L226 Difference]: Without dead ends: 4352 [2021-06-05 21:19:11,228 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 52.7ms TimeCoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:19:11,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4352 states. [2021-06-05 21:19:11,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4352 to 3904. [2021-06-05 21:19:11,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3904 states, 3903 states have (on average 2.9741224698949527) internal successors, (11608), 3903 states have internal predecessors, (11608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:11,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3904 states to 3904 states and 11608 transitions. [2021-06-05 21:19:11,269 INFO L78 Accepts]: Start accepts. Automaton has 3904 states and 11608 transitions. Word has length 22 [2021-06-05 21:19:11,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:11,269 INFO L482 AbstractCegarLoop]: Abstraction has 3904 states and 11608 transitions. [2021-06-05 21:19:11,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:11,269 INFO L276 IsEmpty]: Start isEmpty. Operand 3904 states and 11608 transitions. [2021-06-05 21:19:11,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:11,272 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:11,272 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:11,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2918,207 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:11,472 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:11,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:11,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1213285072, now seen corresponding path program 206 times [2021-06-05 21:19:11,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:11,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087982356] [2021-06-05 21:19:11,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:11,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:11,527 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:11,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:11,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087982356] [2021-06-05 21:19:11,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087982356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:11,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554663008] [2021-06-05 21:19:11,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:11,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:19:11,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:11,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:11,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:11,588 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:11,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554663008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:11,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:11,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:19:11,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836211777] [2021-06-05 21:19:11,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:19:11,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:11,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:19:11,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:19:11,589 INFO L87 Difference]: Start difference. First operand 3904 states and 11608 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:11,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:11,752 INFO L93 Difference]: Finished difference Result 4085 states and 11883 transitions. [2021-06-05 21:19:11,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:19:11,753 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:11,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:11,757 INFO L225 Difference]: With dead ends: 4085 [2021-06-05 21:19:11,758 INFO L226 Difference]: Without dead ends: 4079 [2021-06-05 21:19:11,758 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 110.9ms TimeCoverageRelationStatistics Valid=194, Invalid=358, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:19:11,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4079 states. [2021-06-05 21:19:11,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4079 to 3861. [2021-06-05 21:19:11,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3861 states, 3860 states have (on average 2.978238341968912) internal successors, (11496), 3860 states have internal predecessors, (11496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:11,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3861 states to 3861 states and 11496 transitions. [2021-06-05 21:19:11,803 INFO L78 Accepts]: Start accepts. Automaton has 3861 states and 11496 transitions. Word has length 22 [2021-06-05 21:19:11,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:11,803 INFO L482 AbstractCegarLoop]: Abstraction has 3861 states and 11496 transitions. [2021-06-05 21:19:11,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:11,803 INFO L276 IsEmpty]: Start isEmpty. Operand 3861 states and 11496 transitions. [2021-06-05 21:19:11,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:11,807 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:11,807 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:12,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2919 [2021-06-05 21:19:12,007 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:12,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:12,007 INFO L82 PathProgramCache]: Analyzing trace with hash 559077935, now seen corresponding path program 207 times [2021-06-05 21:19:12,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:12,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418595529] [2021-06-05 21:19:12,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:12,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:12,060 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:12,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:12,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418595529] [2021-06-05 21:19:12,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418595529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:12,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202378812] [2021-06-05 21:19:12,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:12,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:19:12,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:12,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:12,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:12,131 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:12,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202378812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:12,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:12,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:19:12,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006650979] [2021-06-05 21:19:12,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:19:12,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:12,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:19:12,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:19:12,132 INFO L87 Difference]: Start difference. First operand 3861 states and 11496 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:12,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:12,211 INFO L93 Difference]: Finished difference Result 4587 states and 12943 transitions. [2021-06-05 21:19:12,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:19:12,211 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:12,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:12,215 INFO L225 Difference]: With dead ends: 4587 [2021-06-05 21:19:12,215 INFO L226 Difference]: Without dead ends: 4587 [2021-06-05 21:19:12,215 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 68.1ms TimeCoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:19:12,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4587 states. [2021-06-05 21:19:12,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4587 to 3836. [2021-06-05 21:19:12,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3836 states, 3835 states have (on average 2.9734028683181224) internal successors, (11403), 3835 states have internal predecessors, (11403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:12,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3836 states to 3836 states and 11403 transitions. [2021-06-05 21:19:12,261 INFO L78 Accepts]: Start accepts. Automaton has 3836 states and 11403 transitions. Word has length 22 [2021-06-05 21:19:12,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:12,261 INFO L482 AbstractCegarLoop]: Abstraction has 3836 states and 11403 transitions. [2021-06-05 21:19:12,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:12,261 INFO L276 IsEmpty]: Start isEmpty. Operand 3836 states and 11403 transitions. [2021-06-05 21:19:12,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:12,264 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:12,264 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:12,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2920 [2021-06-05 21:19:12,465 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:12,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:12,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1612288028, now seen corresponding path program 208 times [2021-06-05 21:19:12,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:12,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445831901] [2021-06-05 21:19:12,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:12,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:12,515 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:12,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:12,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445831901] [2021-06-05 21:19:12,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445831901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:12,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210075813] [2021-06-05 21:19:12,516 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:12,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:19:12,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:12,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:12,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:12,579 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:19:12,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210075813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:12,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:12,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:19:12,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858423923] [2021-06-05 21:19:12,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:19:12,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:12,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:19:12,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:19:12,580 INFO L87 Difference]: Start difference. First operand 3836 states and 11403 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:12,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:12,687 INFO L93 Difference]: Finished difference Result 4225 states and 12107 transitions. [2021-06-05 21:19:12,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:19:12,687 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:12,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:12,692 INFO L225 Difference]: With dead ends: 4225 [2021-06-05 21:19:12,692 INFO L226 Difference]: Without dead ends: 4225 [2021-06-05 21:19:12,692 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 80.1ms TimeCoverageRelationStatistics Valid=134, Invalid=208, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:19:12,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4225 states. [2021-06-05 21:19:12,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4225 to 3857. [2021-06-05 21:19:12,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3857 states, 3856 states have (on average 2.975103734439834) internal successors, (11472), 3856 states have internal predecessors, (11472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:12,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3857 states to 3857 states and 11472 transitions. [2021-06-05 21:19:12,740 INFO L78 Accepts]: Start accepts. Automaton has 3857 states and 11472 transitions. Word has length 22 [2021-06-05 21:19:12,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:12,740 INFO L482 AbstractCegarLoop]: Abstraction has 3857 states and 11472 transitions. [2021-06-05 21:19:12,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:12,740 INFO L276 IsEmpty]: Start isEmpty. Operand 3857 states and 11472 transitions. [2021-06-05 21:19:12,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:12,744 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:12,744 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:12,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2921 [2021-06-05 21:19:12,944 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:12,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:12,945 INFO L82 PathProgramCache]: Analyzing trace with hash -667526045, now seen corresponding path program 209 times [2021-06-05 21:19:12,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:12,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454883089] [2021-06-05 21:19:12,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:12,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:12,994 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 26 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:12,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:12,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454883089] [2021-06-05 21:19:12,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454883089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:12,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006072503] [2021-06-05 21:19:12,994 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:13,019 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:19:13,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:13,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:13,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:13,073 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:19:13,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006072503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:13,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:13,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:19:13,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83360514] [2021-06-05 21:19:13,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:19:13,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:13,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:19:13,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:19:13,074 INFO L87 Difference]: Start difference. First operand 3857 states and 11472 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:13,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:13,206 INFO L93 Difference]: Finished difference Result 4205 states and 11997 transitions. [2021-06-05 21:19:13,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:19:13,206 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:13,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:13,210 INFO L225 Difference]: With dead ends: 4205 [2021-06-05 21:19:13,210 INFO L226 Difference]: Without dead ends: 4203 [2021-06-05 21:19:13,210 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 95.4ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:19:13,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4203 states. [2021-06-05 21:19:13,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4203 to 3869. [2021-06-05 21:19:13,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3869 states, 3868 states have (on average 2.9762150982419855) internal successors, (11512), 3868 states have internal predecessors, (11512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:13,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3869 states to 3869 states and 11512 transitions. [2021-06-05 21:19:13,249 INFO L78 Accepts]: Start accepts. Automaton has 3869 states and 11512 transitions. Word has length 22 [2021-06-05 21:19:13,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:13,249 INFO L482 AbstractCegarLoop]: Abstraction has 3869 states and 11512 transitions. [2021-06-05 21:19:13,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:13,249 INFO L276 IsEmpty]: Start isEmpty. Operand 3869 states and 11512 transitions. [2021-06-05 21:19:13,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:13,252 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:13,252 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:13,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2922,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:13,454 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:13,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:13,454 INFO L82 PathProgramCache]: Analyzing trace with hash 133166662, now seen corresponding path program 210 times [2021-06-05 21:19:13,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:13,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215962927] [2021-06-05 21:19:13,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:13,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:13,504 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:19:13,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:13,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215962927] [2021-06-05 21:19:13,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215962927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:13,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316828102] [2021-06-05 21:19:13,505 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:13,529 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:19:13,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:13,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:13,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:13,570 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:19:13,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316828102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:13,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:13,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:19:13,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703932082] [2021-06-05 21:19:13,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:19:13,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:13,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:19:13,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:19:13,571 INFO L87 Difference]: Start difference. First operand 3869 states and 11512 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:13,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:13,722 INFO L93 Difference]: Finished difference Result 4090 states and 11844 transitions. [2021-06-05 21:19:13,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:19:13,722 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:13,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:13,727 INFO L225 Difference]: With dead ends: 4090 [2021-06-05 21:19:13,727 INFO L226 Difference]: Without dead ends: 4088 [2021-06-05 21:19:13,727 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 91.3ms TimeCoverageRelationStatistics Valid=170, Invalid=292, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:19:13,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4088 states. [2021-06-05 21:19:13,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4088 to 3838. [2021-06-05 21:19:13,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3838 states, 3837 states have (on average 2.973416731821736) internal successors, (11409), 3837 states have internal predecessors, (11409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:13,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 11409 transitions. [2021-06-05 21:19:13,775 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 11409 transitions. Word has length 22 [2021-06-05 21:19:13,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:13,775 INFO L482 AbstractCegarLoop]: Abstraction has 3838 states and 11409 transitions. [2021-06-05 21:19:13,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:13,775 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 11409 transitions. [2021-06-05 21:19:13,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:13,778 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:13,778 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:13,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2923,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:13,979 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:13,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:13,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1050223015, now seen corresponding path program 211 times [2021-06-05 21:19:13,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:13,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408973411] [2021-06-05 21:19:13,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:13,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:14,028 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:19:14,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:14,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408973411] [2021-06-05 21:19:14,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408973411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:14,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319490781] [2021-06-05 21:19:14,028 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:14,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:14,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:14,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:14,090 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:19:14,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319490781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:14,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:14,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:19:14,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485850861] [2021-06-05 21:19:14,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:19:14,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:14,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:19:14,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:19:14,091 INFO L87 Difference]: Start difference. First operand 3838 states and 11409 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:14,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:14,153 INFO L93 Difference]: Finished difference Result 4172 states and 11863 transitions. [2021-06-05 21:19:14,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:19:14,153 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:14,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:14,157 INFO L225 Difference]: With dead ends: 4172 [2021-06-05 21:19:14,157 INFO L226 Difference]: Without dead ends: 4172 [2021-06-05 21:19:14,157 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 49.0ms TimeCoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:19:14,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4172 states. [2021-06-05 21:19:14,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4172 to 3828. [2021-06-05 21:19:14,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3828 states, 3827 states have (on average 2.9699503527567286) internal successors, (11366), 3827 states have internal predecessors, (11366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:14,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3828 states to 3828 states and 11366 transitions. [2021-06-05 21:19:14,196 INFO L78 Accepts]: Start accepts. Automaton has 3828 states and 11366 transitions. Word has length 22 [2021-06-05 21:19:14,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:14,196 INFO L482 AbstractCegarLoop]: Abstraction has 3828 states and 11366 transitions. [2021-06-05 21:19:14,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:14,196 INFO L276 IsEmpty]: Start isEmpty. Operand 3828 states and 11366 transitions. [2021-06-05 21:19:14,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:14,199 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:14,199 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:14,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2924,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:14,399 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:14,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:14,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1843779970, now seen corresponding path program 212 times [2021-06-05 21:19:14,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:14,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258829079] [2021-06-05 21:19:14,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:14,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:14,457 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:14,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:14,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258829079] [2021-06-05 21:19:14,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258829079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:14,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719405366] [2021-06-05 21:19:14,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:14,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:19:14,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:14,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:14,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:14,514 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:14,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719405366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:14,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:14,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:19:14,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3847274] [2021-06-05 21:19:14,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:19:14,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:14,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:19:14,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:19:14,515 INFO L87 Difference]: Start difference. First operand 3828 states and 11366 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:14,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:14,676 INFO L93 Difference]: Finished difference Result 4046 states and 11697 transitions. [2021-06-05 21:19:14,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:19:14,676 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:14,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:14,681 INFO L225 Difference]: With dead ends: 4046 [2021-06-05 21:19:14,681 INFO L226 Difference]: Without dead ends: 4044 [2021-06-05 21:19:14,681 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 105.6ms TimeCoverageRelationStatistics Valid=195, Invalid=357, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:19:14,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4044 states. [2021-06-05 21:19:14,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4044 to 3828. [2021-06-05 21:19:14,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3828 states, 3827 states have (on average 2.969427750195976) internal successors, (11364), 3827 states have internal predecessors, (11364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:14,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3828 states to 3828 states and 11364 transitions. [2021-06-05 21:19:14,727 INFO L78 Accepts]: Start accepts. Automaton has 3828 states and 11364 transitions. Word has length 22 [2021-06-05 21:19:14,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:14,727 INFO L482 AbstractCegarLoop]: Abstraction has 3828 states and 11364 transitions. [2021-06-05 21:19:14,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:14,727 INFO L276 IsEmpty]: Start isEmpty. Operand 3828 states and 11364 transitions. [2021-06-05 21:19:14,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:14,730 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:14,730 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:14,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2925,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:14,931 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:14,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:14,931 INFO L82 PathProgramCache]: Analyzing trace with hash -678824319, now seen corresponding path program 213 times [2021-06-05 21:19:14,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:14,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308660906] [2021-06-05 21:19:14,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:14,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:14,986 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:14,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:14,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308660906] [2021-06-05 21:19:14,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308660906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:14,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717258241] [2021-06-05 21:19:14,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:15,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:19:15,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:15,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:15,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:15,053 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:15,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717258241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:15,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:15,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:19:15,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326409467] [2021-06-05 21:19:15,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:19:15,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:15,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:19:15,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:19:15,054 INFO L87 Difference]: Start difference. First operand 3828 states and 11364 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:15,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:15,132 INFO L93 Difference]: Finished difference Result 4424 states and 12469 transitions. [2021-06-05 21:19:15,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:19:15,133 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:15,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:15,137 INFO L225 Difference]: With dead ends: 4424 [2021-06-05 21:19:15,137 INFO L226 Difference]: Without dead ends: 4424 [2021-06-05 21:19:15,137 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 64.1ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:19:15,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4424 states. [2021-06-05 21:19:15,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4424 to 3838. [2021-06-05 21:19:15,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3838 states, 3837 states have (on average 2.9689861871253584) internal successors, (11392), 3837 states have internal predecessors, (11392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:15,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 11392 transitions. [2021-06-05 21:19:15,181 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 11392 transitions. Word has length 22 [2021-06-05 21:19:15,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:15,181 INFO L482 AbstractCegarLoop]: Abstraction has 3838 states and 11392 transitions. [2021-06-05 21:19:15,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:15,181 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 11392 transitions. [2021-06-05 21:19:15,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:15,184 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:15,184 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:15,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2926,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:15,384 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:15,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:15,385 INFO L82 PathProgramCache]: Analyzing trace with hash -961782330, now seen corresponding path program 214 times [2021-06-05 21:19:15,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:15,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777274492] [2021-06-05 21:19:15,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:15,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:15,444 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:15,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:15,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777274492] [2021-06-05 21:19:15,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777274492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:15,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226295545] [2021-06-05 21:19:15,445 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:15,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:19:15,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:15,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:15,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:15,500 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:15,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226295545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:15,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:15,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:19:15,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401850235] [2021-06-05 21:19:15,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:19:15,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:15,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:19:15,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:19:15,501 INFO L87 Difference]: Start difference. First operand 3838 states and 11392 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:15,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:15,646 INFO L93 Difference]: Finished difference Result 4109 states and 11999 transitions. [2021-06-05 21:19:15,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:19:15,646 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:15,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:15,650 INFO L225 Difference]: With dead ends: 4109 [2021-06-05 21:19:15,650 INFO L226 Difference]: Without dead ends: 4106 [2021-06-05 21:19:15,651 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 106.1ms TimeCoverageRelationStatistics Valid=188, Invalid=364, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:19:15,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4106 states. [2021-06-05 21:19:15,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4106 to 3841. [2021-06-05 21:19:15,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3841 states, 3840 states have (on average 2.968489583333333) internal successors, (11399), 3840 states have internal predecessors, (11399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:15,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3841 states to 3841 states and 11399 transitions. [2021-06-05 21:19:15,693 INFO L78 Accepts]: Start accepts. Automaton has 3841 states and 11399 transitions. Word has length 22 [2021-06-05 21:19:15,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:15,693 INFO L482 AbstractCegarLoop]: Abstraction has 3841 states and 11399 transitions. [2021-06-05 21:19:15,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:15,693 INFO L276 IsEmpty]: Start isEmpty. Operand 3841 states and 11399 transitions. [2021-06-05 21:19:15,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:15,697 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:15,697 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:15,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2927,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:15,898 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:15,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:15,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1555283175, now seen corresponding path program 215 times [2021-06-05 21:19:15,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:15,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253382789] [2021-06-05 21:19:15,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:15,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:15,954 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:15,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:15,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253382789] [2021-06-05 21:19:15,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253382789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:15,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360498816] [2021-06-05 21:19:15,955 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:15,979 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:19:15,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:15,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:15,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:16,018 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:16,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360498816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:16,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:16,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:19:16,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502816002] [2021-06-05 21:19:16,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:19:16,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:16,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:19:16,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:19:16,019 INFO L87 Difference]: Start difference. First operand 3841 states and 11399 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:16,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:16,128 INFO L93 Difference]: Finished difference Result 5862 states and 16951 transitions. [2021-06-05 21:19:16,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:19:16,129 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:16,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:16,134 INFO L225 Difference]: With dead ends: 5862 [2021-06-05 21:19:16,134 INFO L226 Difference]: Without dead ends: 5862 [2021-06-05 21:19:16,134 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 87.6ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:19:16,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5862 states. [2021-06-05 21:19:16,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5862 to 5031. [2021-06-05 21:19:16,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5031 states, 5030 states have (on average 3.0290258449304175) internal successors, (15236), 5030 states have internal predecessors, (15236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:16,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5031 states to 5031 states and 15236 transitions. [2021-06-05 21:19:16,189 INFO L78 Accepts]: Start accepts. Automaton has 5031 states and 15236 transitions. Word has length 22 [2021-06-05 21:19:16,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:16,189 INFO L482 AbstractCegarLoop]: Abstraction has 5031 states and 15236 transitions. [2021-06-05 21:19:16,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:16,189 INFO L276 IsEmpty]: Start isEmpty. Operand 5031 states and 15236 transitions. [2021-06-05 21:19:16,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:16,193 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:16,193 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:16,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2928,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:16,393 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:16,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:16,393 INFO L82 PathProgramCache]: Analyzing trace with hash -69053073, now seen corresponding path program 216 times [2021-06-05 21:19:16,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:16,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11099443] [2021-06-05 21:19:16,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:16,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:16,445 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:19:16,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:16,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11099443] [2021-06-05 21:19:16,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11099443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:16,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090984212] [2021-06-05 21:19:16,446 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:16,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:19:16,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:16,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:16,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:16,516 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:19:16,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090984212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:16,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:16,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:19:16,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026646368] [2021-06-05 21:19:16,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:19:16,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:16,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:19:16,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:19:16,517 INFO L87 Difference]: Start difference. First operand 5031 states and 15236 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:16,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:16,688 INFO L93 Difference]: Finished difference Result 5380 states and 15831 transitions. [2021-06-05 21:19:16,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:19:16,688 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:16,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:16,697 INFO L225 Difference]: With dead ends: 5380 [2021-06-05 21:19:16,697 INFO L226 Difference]: Without dead ends: 5376 [2021-06-05 21:19:16,697 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 105.5ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:19:16,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5376 states. [2021-06-05 21:19:16,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5376 to 5084. [2021-06-05 21:19:16,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5084 states, 5083 states have (on average 3.0334448160535117) internal successors, (15419), 5083 states have internal predecessors, (15419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:16,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5084 states to 5084 states and 15419 transitions. [2021-06-05 21:19:16,794 INFO L78 Accepts]: Start accepts. Automaton has 5084 states and 15419 transitions. Word has length 22 [2021-06-05 21:19:16,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:16,794 INFO L482 AbstractCegarLoop]: Abstraction has 5084 states and 15419 transitions. [2021-06-05 21:19:16,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:16,794 INFO L276 IsEmpty]: Start isEmpty. Operand 5084 states and 15419 transitions. [2021-06-05 21:19:16,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:16,801 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:16,801 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:17,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2929,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:17,023 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:17,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:17,024 INFO L82 PathProgramCache]: Analyzing trace with hash -175700274, now seen corresponding path program 217 times [2021-06-05 21:19:17,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:17,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267841773] [2021-06-05 21:19:17,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:17,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:17,081 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:17,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:17,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267841773] [2021-06-05 21:19:17,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267841773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:17,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132642698] [2021-06-05 21:19:17,082 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:17,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:17,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:17,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:17,137 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:17,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132642698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:17,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:17,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:19:17,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400075197] [2021-06-05 21:19:17,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:19:17,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:17,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:19:17,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:19:17,138 INFO L87 Difference]: Start difference. First operand 5084 states and 15419 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:17,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:17,289 INFO L93 Difference]: Finished difference Result 5286 states and 15759 transitions. [2021-06-05 21:19:17,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:19:17,290 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:17,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:17,294 INFO L225 Difference]: With dead ends: 5286 [2021-06-05 21:19:17,294 INFO L226 Difference]: Without dead ends: 5280 [2021-06-05 21:19:17,294 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 106.8ms TimeCoverageRelationStatistics Valid=189, Invalid=363, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:19:17,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5280 states. [2021-06-05 21:19:17,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5280 to 5075. [2021-06-05 21:19:17,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5075 states, 5074 states have (on average 3.034095388253843) internal successors, (15395), 5074 states have internal predecessors, (15395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:17,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5075 states to 5075 states and 15395 transitions. [2021-06-05 21:19:17,351 INFO L78 Accepts]: Start accepts. Automaton has 5075 states and 15395 transitions. Word has length 22 [2021-06-05 21:19:17,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:17,351 INFO L482 AbstractCegarLoop]: Abstraction has 5075 states and 15395 transitions. [2021-06-05 21:19:17,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:17,351 INFO L276 IsEmpty]: Start isEmpty. Operand 5075 states and 15395 transitions. [2021-06-05 21:19:17,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:17,356 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:17,356 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:17,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2930 [2021-06-05 21:19:17,556 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:17,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:17,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1953602065, now seen corresponding path program 218 times [2021-06-05 21:19:17,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:17,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873354883] [2021-06-05 21:19:17,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:17,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:17,614 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:17,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:17,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873354883] [2021-06-05 21:19:17,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873354883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:17,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153766538] [2021-06-05 21:19:17,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:17,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:19:17,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:17,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:17,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:17,675 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:17,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153766538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:17,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:17,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:19:17,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757636971] [2021-06-05 21:19:17,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:19:17,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:17,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:19:17,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:19:17,676 INFO L87 Difference]: Start difference. First operand 5075 states and 15395 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:17,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:17,777 INFO L93 Difference]: Finished difference Result 6136 states and 17834 transitions. [2021-06-05 21:19:17,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:19:17,777 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:17,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:17,784 INFO L225 Difference]: With dead ends: 6136 [2021-06-05 21:19:17,784 INFO L226 Difference]: Without dead ends: 6136 [2021-06-05 21:19:17,785 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 83.8ms TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:19:17,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6136 states. [2021-06-05 21:19:17,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6136 to 3901. [2021-06-05 21:19:17,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3901 states, 3900 states have (on average 2.9856410256410255) internal successors, (11644), 3900 states have internal predecessors, (11644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:17,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3901 states to 3901 states and 11644 transitions. [2021-06-05 21:19:17,879 INFO L78 Accepts]: Start accepts. Automaton has 3901 states and 11644 transitions. Word has length 22 [2021-06-05 21:19:17,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:17,879 INFO L482 AbstractCegarLoop]: Abstraction has 3901 states and 11644 transitions. [2021-06-05 21:19:17,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:17,879 INFO L276 IsEmpty]: Start isEmpty. Operand 3901 states and 11644 transitions. [2021-06-05 21:19:17,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:17,883 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:17,883 INFO L554 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:18,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2931 [2021-06-05 21:19:18,083 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:18,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:18,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1332552238, now seen corresponding path program 219 times [2021-06-05 21:19:18,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:18,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011971724] [2021-06-05 21:19:18,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:18,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:18,134 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:18,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:18,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011971724] [2021-06-05 21:19:18,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011971724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:18,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283340419] [2021-06-05 21:19:18,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:18,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:19:18,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:18,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 21:19:18,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:18,270 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 4 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 21:19:18,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283340419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:18,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:18,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-06-05 21:19:18,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615087033] [2021-06-05 21:19:18,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:19:18,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:18,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:19:18,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:19:18,271 INFO L87 Difference]: Start difference. First operand 3901 states and 11644 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:19,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:19,404 INFO L93 Difference]: Finished difference Result 9069 states and 26193 transitions. [2021-06-05 21:19:19,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-06-05 21:19:19,404 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:19,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:19,412 INFO L225 Difference]: With dead ends: 9069 [2021-06-05 21:19:19,412 INFO L226 Difference]: Without dead ends: 9055 [2021-06-05 21:19:19,413 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3104 ImplicationChecksByTransitivity, 873.5ms TimeCoverageRelationStatistics Valid=1057, Invalid=8255, Unknown=0, NotChecked=0, Total=9312 [2021-06-05 21:19:19,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9055 states. [2021-06-05 21:19:19,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9055 to 5387. [2021-06-05 21:19:19,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5387 states, 5386 states have (on average 2.9433717044188636) internal successors, (15853), 5386 states have internal predecessors, (15853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:19,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5387 states to 5387 states and 15853 transitions. [2021-06-05 21:19:19,491 INFO L78 Accepts]: Start accepts. Automaton has 5387 states and 15853 transitions. Word has length 22 [2021-06-05 21:19:19,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:19,491 INFO L482 AbstractCegarLoop]: Abstraction has 5387 states and 15853 transitions. [2021-06-05 21:19:19,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:19,491 INFO L276 IsEmpty]: Start isEmpty. Operand 5387 states and 15853 transitions. [2021-06-05 21:19:19,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:19,497 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:19,497 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:19,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2932,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:19,698 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:19,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:19,698 INFO L82 PathProgramCache]: Analyzing trace with hash -387790255, now seen corresponding path program 220 times [2021-06-05 21:19:19,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:19,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637301392] [2021-06-05 21:19:19,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:19,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:19,744 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 27 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:19,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:19,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637301392] [2021-06-05 21:19:19,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637301392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:19,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728160088] [2021-06-05 21:19:19,745 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:19,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:19:19,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:19,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:19,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:19,800 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:19:19,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728160088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:19,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:19,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:19:19,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597282462] [2021-06-05 21:19:19,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:19:19,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:19,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:19:19,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:19:19,801 INFO L87 Difference]: Start difference. First operand 5387 states and 15853 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:19,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:19,940 INFO L93 Difference]: Finished difference Result 5771 states and 16395 transitions. [2021-06-05 21:19:19,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:19:19,940 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:19,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:19,946 INFO L225 Difference]: With dead ends: 5771 [2021-06-05 21:19:19,947 INFO L226 Difference]: Without dead ends: 5767 [2021-06-05 21:19:19,947 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 93.8ms TimeCoverageRelationStatistics Valid=173, Invalid=289, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:19:19,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5767 states. [2021-06-05 21:19:20,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5767 to 5367. [2021-06-05 21:19:20,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5367 states, 5366 states have (on average 2.9403652627655608) internal successors, (15778), 5366 states have internal predecessors, (15778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:20,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5367 states to 5367 states and 15778 transitions. [2021-06-05 21:19:20,021 INFO L78 Accepts]: Start accepts. Automaton has 5367 states and 15778 transitions. Word has length 22 [2021-06-05 21:19:20,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:20,021 INFO L482 AbstractCegarLoop]: Abstraction has 5367 states and 15778 transitions. [2021-06-05 21:19:20,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:20,021 INFO L276 IsEmpty]: Start isEmpty. Operand 5367 states and 15778 transitions. [2021-06-05 21:19:20,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:20,026 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:20,026 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:20,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2933 [2021-06-05 21:19:20,227 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:20,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:20,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1329958805, now seen corresponding path program 221 times [2021-06-05 21:19:20,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:20,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401304850] [2021-06-05 21:19:20,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:20,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:20,276 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 26 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:20,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:20,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401304850] [2021-06-05 21:19:20,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401304850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:20,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601141348] [2021-06-05 21:19:20,276 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:20,301 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:19:20,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:20,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:20,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:20,339 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:20,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601141348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:20,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:20,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:19:20,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577606300] [2021-06-05 21:19:20,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:19:20,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:20,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:19:20,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:19:20,340 INFO L87 Difference]: Start difference. First operand 5367 states and 15778 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:20,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:20,410 INFO L93 Difference]: Finished difference Result 5976 states and 16857 transitions. [2021-06-05 21:19:20,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:19:20,410 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:20,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:20,416 INFO L225 Difference]: With dead ends: 5976 [2021-06-05 21:19:20,416 INFO L226 Difference]: Without dead ends: 5976 [2021-06-05 21:19:20,416 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 52.9ms TimeCoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:19:20,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5976 states. [2021-06-05 21:19:20,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5976 to 5368. [2021-06-05 21:19:20,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5368 states, 5367 states have (on average 2.9381404881684365) internal successors, (15769), 5367 states have internal predecessors, (15769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:20,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5368 states to 5368 states and 15769 transitions. [2021-06-05 21:19:20,479 INFO L78 Accepts]: Start accepts. Automaton has 5368 states and 15769 transitions. Word has length 22 [2021-06-05 21:19:20,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:20,479 INFO L482 AbstractCegarLoop]: Abstraction has 5368 states and 15769 transitions. [2021-06-05 21:19:20,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:20,479 INFO L276 IsEmpty]: Start isEmpty. Operand 5368 states and 15769 transitions. [2021-06-05 21:19:20,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:20,484 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:20,484 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:20,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2934,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:20,689 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:20,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:20,689 INFO L82 PathProgramCache]: Analyzing trace with hash -399088529, now seen corresponding path program 222 times [2021-06-05 21:19:20,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:20,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006280522] [2021-06-05 21:19:20,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:20,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:20,738 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:19:20,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:20,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006280522] [2021-06-05 21:19:20,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006280522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:20,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333830018] [2021-06-05 21:19:20,738 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:20,763 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:19:20,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:20,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:20,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:20,806 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:19:20,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333830018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:20,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:20,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:19:20,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522362952] [2021-06-05 21:19:20,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:19:20,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:20,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:19:20,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:19:20,807 INFO L87 Difference]: Start difference. First operand 5368 states and 15769 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:20,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:20,881 INFO L93 Difference]: Finished difference Result 5731 states and 16223 transitions. [2021-06-05 21:19:20,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:19:20,881 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:20,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:20,887 INFO L225 Difference]: With dead ends: 5731 [2021-06-05 21:19:20,888 INFO L226 Difference]: Without dead ends: 5731 [2021-06-05 21:19:20,888 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 59.4ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:19:20,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5731 states. [2021-06-05 21:19:20,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5731 to 5320. [2021-06-05 21:19:20,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5320 states, 5319 states have (on average 2.9332581312276744) internal successors, (15602), 5319 states have internal predecessors, (15602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:20,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5320 states to 5320 states and 15602 transitions. [2021-06-05 21:19:20,958 INFO L78 Accepts]: Start accepts. Automaton has 5320 states and 15602 transitions. Word has length 22 [2021-06-05 21:19:20,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:20,958 INFO L482 AbstractCegarLoop]: Abstraction has 5320 states and 15602 transitions. [2021-06-05 21:19:20,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:20,958 INFO L276 IsEmpty]: Start isEmpty. Operand 5320 states and 15602 transitions. [2021-06-05 21:19:20,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:20,963 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:20,963 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:21,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2935 [2021-06-05 21:19:21,164 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:21,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:21,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1835018965, now seen corresponding path program 223 times [2021-06-05 21:19:21,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:21,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728364509] [2021-06-05 21:19:21,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:21,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:21,221 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:21,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:21,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728364509] [2021-06-05 21:19:21,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728364509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:21,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983103290] [2021-06-05 21:19:21,221 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:21,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:21,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:21,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:21,302 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:21,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983103290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:21,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:21,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:19:21,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552661450] [2021-06-05 21:19:21,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:19:21,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:21,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:19:21,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:19:21,302 INFO L87 Difference]: Start difference. First operand 5320 states and 15602 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:21,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:21,406 INFO L93 Difference]: Finished difference Result 6238 states and 17516 transitions. [2021-06-05 21:19:21,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:19:21,406 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:21,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:21,411 INFO L225 Difference]: With dead ends: 6238 [2021-06-05 21:19:21,412 INFO L226 Difference]: Without dead ends: 6238 [2021-06-05 21:19:21,412 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 85.2ms TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:19:21,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6238 states. [2021-06-05 21:19:21,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6238 to 5233. [2021-06-05 21:19:21,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5233 states, 5232 states have (on average 2.922400611620795) internal successors, (15290), 5232 states have internal predecessors, (15290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:21,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5233 states to 5233 states and 15290 transitions. [2021-06-05 21:19:21,473 INFO L78 Accepts]: Start accepts. Automaton has 5233 states and 15290 transitions. Word has length 22 [2021-06-05 21:19:21,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:21,473 INFO L482 AbstractCegarLoop]: Abstraction has 5233 states and 15290 transitions. [2021-06-05 21:19:21,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:21,474 INFO L276 IsEmpty]: Start isEmpty. Operand 5233 states and 15290 transitions. [2021-06-05 21:19:21,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:21,477 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:21,477 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:21,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2936,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:21,678 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:21,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:21,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1922092753, now seen corresponding path program 224 times [2021-06-05 21:19:21,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:21,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811206117] [2021-06-05 21:19:21,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:21,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:21,737 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:21,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:21,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811206117] [2021-06-05 21:19:21,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811206117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:21,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518581509] [2021-06-05 21:19:21,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:21,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:19:21,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:21,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:21,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:21,806 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:21,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518581509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:21,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:21,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:19:21,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843518983] [2021-06-05 21:19:21,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:19:21,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:21,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:19:21,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:19:21,807 INFO L87 Difference]: Start difference. First operand 5233 states and 15290 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:21,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:21,961 INFO L93 Difference]: Finished difference Result 8227 states and 23267 transitions. [2021-06-05 21:19:21,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:19:21,961 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:21,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:21,972 INFO L225 Difference]: With dead ends: 8227 [2021-06-05 21:19:21,972 INFO L226 Difference]: Without dead ends: 8227 [2021-06-05 21:19:21,972 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 115.6ms TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:19:21,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8227 states. [2021-06-05 21:19:22,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8227 to 6539. [2021-06-05 21:19:22,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6539 states, 6538 states have (on average 2.962220862649128) internal successors, (19367), 6538 states have internal predecessors, (19367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:22,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6539 states to 6539 states and 19367 transitions. [2021-06-05 21:19:22,072 INFO L78 Accepts]: Start accepts. Automaton has 6539 states and 19367 transitions. Word has length 22 [2021-06-05 21:19:22,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:22,072 INFO L482 AbstractCegarLoop]: Abstraction has 6539 states and 19367 transitions. [2021-06-05 21:19:22,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:22,072 INFO L276 IsEmpty]: Start isEmpty. Operand 6539 states and 19367 transitions. [2021-06-05 21:19:22,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:22,079 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:22,079 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:22,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2937,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:22,280 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:22,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:22,280 INFO L82 PathProgramCache]: Analyzing trace with hash 971614503, now seen corresponding path program 225 times [2021-06-05 21:19:22,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:22,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366878686] [2021-06-05 21:19:22,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:22,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:22,339 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:22,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:22,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366878686] [2021-06-05 21:19:22,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366878686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:22,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710218912] [2021-06-05 21:19:22,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:22,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:19:22,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:22,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:22,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:22,404 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:22,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710218912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:22,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:22,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:19:22,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444929318] [2021-06-05 21:19:22,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:19:22,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:22,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:19:22,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:19:22,405 INFO L87 Difference]: Start difference. First operand 6539 states and 19367 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:22,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:22,560 INFO L93 Difference]: Finished difference Result 8105 states and 23072 transitions. [2021-06-05 21:19:22,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:19:22,561 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:22,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:22,568 INFO L225 Difference]: With dead ends: 8105 [2021-06-05 21:19:22,568 INFO L226 Difference]: Without dead ends: 8105 [2021-06-05 21:19:22,569 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 107.7ms TimeCoverageRelationStatistics Valid=199, Invalid=353, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:19:22,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8105 states. [2021-06-05 21:19:22,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8105 to 5159. [2021-06-05 21:19:22,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5159 states, 5158 states have (on average 2.929042264443583) internal successors, (15108), 5158 states have internal predecessors, (15108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:22,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5159 states to 5159 states and 15108 transitions. [2021-06-05 21:19:22,643 INFO L78 Accepts]: Start accepts. Automaton has 5159 states and 15108 transitions. Word has length 22 [2021-06-05 21:19:22,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:22,644 INFO L482 AbstractCegarLoop]: Abstraction has 5159 states and 15108 transitions. [2021-06-05 21:19:22,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:22,644 INFO L276 IsEmpty]: Start isEmpty. Operand 5159 states and 15108 transitions. [2021-06-05 21:19:22,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:22,648 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:22,648 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:22,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2938,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:22,849 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:22,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:22,849 INFO L82 PathProgramCache]: Analyzing trace with hash -305915357, now seen corresponding path program 226 times [2021-06-05 21:19:22,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:22,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803591151] [2021-06-05 21:19:22,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:22,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:22,893 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 26 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:22,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:22,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803591151] [2021-06-05 21:19:22,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803591151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:22,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968909517] [2021-06-05 21:19:22,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:22,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:19:22,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:22,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:22,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:22,949 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:19:22,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968909517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:22,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:22,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:19:22,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869403472] [2021-06-05 21:19:22,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:19:22,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:22,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:19:22,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:19:22,950 INFO L87 Difference]: Start difference. First operand 5159 states and 15108 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:23,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:23,080 INFO L93 Difference]: Finished difference Result 5517 states and 15611 transitions. [2021-06-05 21:19:23,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:19:23,080 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:23,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:23,086 INFO L225 Difference]: With dead ends: 5517 [2021-06-05 21:19:23,086 INFO L226 Difference]: Without dead ends: 5513 [2021-06-05 21:19:23,086 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 89.0ms TimeCoverageRelationStatistics Valid=172, Invalid=290, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:19:23,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5513 states. [2021-06-05 21:19:23,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5513 to 5171. [2021-06-05 21:19:23,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5171 states, 5170 states have (on average 2.927852998065764) internal successors, (15137), 5170 states have internal predecessors, (15137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:23,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5171 states to 5171 states and 15137 transitions. [2021-06-05 21:19:23,163 INFO L78 Accepts]: Start accepts. Automaton has 5171 states and 15137 transitions. Word has length 22 [2021-06-05 21:19:23,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:23,163 INFO L482 AbstractCegarLoop]: Abstraction has 5171 states and 15137 transitions. [2021-06-05 21:19:23,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:23,163 INFO L276 IsEmpty]: Start isEmpty. Operand 5171 states and 15137 transitions. [2021-06-05 21:19:23,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:23,168 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:23,168 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:23,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2939,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:23,369 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:23,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:23,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1411833703, now seen corresponding path program 227 times [2021-06-05 21:19:23,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:23,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443340922] [2021-06-05 21:19:23,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:23,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:23,415 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:19:23,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:23,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443340922] [2021-06-05 21:19:23,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443340922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:23,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275468983] [2021-06-05 21:19:23,415 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:23,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:19:23,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:23,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:23,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:23,477 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:19:23,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275468983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:23,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:23,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:19:23,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918637276] [2021-06-05 21:19:23,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:19:23,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:23,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:19:23,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:19:23,478 INFO L87 Difference]: Start difference. First operand 5171 states and 15137 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:23,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:23,551 INFO L93 Difference]: Finished difference Result 5892 states and 16526 transitions. [2021-06-05 21:19:23,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:19:23,552 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:23,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:23,558 INFO L225 Difference]: With dead ends: 5892 [2021-06-05 21:19:23,558 INFO L226 Difference]: Without dead ends: 5892 [2021-06-05 21:19:23,558 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 55.7ms TimeCoverageRelationStatistics Valid=100, Invalid=140, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:19:23,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5892 states. [2021-06-05 21:19:23,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5892 to 5183. [2021-06-05 21:19:23,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5183 states, 5182 states have (on average 2.9260903126206097) internal successors, (15163), 5182 states have internal predecessors, (15163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:23,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5183 states to 5183 states and 15163 transitions. [2021-06-05 21:19:23,618 INFO L78 Accepts]: Start accepts. Automaton has 5183 states and 15163 transitions. Word has length 22 [2021-06-05 21:19:23,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:23,618 INFO L482 AbstractCegarLoop]: Abstraction has 5183 states and 15163 transitions. [2021-06-05 21:19:23,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:23,618 INFO L276 IsEmpty]: Start isEmpty. Operand 5183 states and 15163 transitions. [2021-06-05 21:19:23,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:23,622 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:23,622 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:23,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2940 [2021-06-05 21:19:23,823 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:23,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:23,823 INFO L82 PathProgramCache]: Analyzing trace with hash -317213631, now seen corresponding path program 228 times [2021-06-05 21:19:23,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:23,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256601285] [2021-06-05 21:19:23,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:23,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:23,873 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:23,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:23,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256601285] [2021-06-05 21:19:23,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256601285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:23,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717264004] [2021-06-05 21:19:23,874 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:23,898 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:19:23,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:23,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:23,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:23,936 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 26 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:23,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717264004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:23,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:23,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:19:23,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397827833] [2021-06-05 21:19:23,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:19:23,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:23,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:19:23,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:19:23,937 INFO L87 Difference]: Start difference. First operand 5183 states and 15163 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:24,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:24,021 INFO L93 Difference]: Finished difference Result 5922 states and 16620 transitions. [2021-06-05 21:19:24,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:19:24,021 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:24,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:24,027 INFO L225 Difference]: With dead ends: 5922 [2021-06-05 21:19:24,027 INFO L226 Difference]: Without dead ends: 5922 [2021-06-05 21:19:24,027 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 67.2ms TimeCoverageRelationStatistics Valid=119, Invalid=187, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:19:24,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5922 states. [2021-06-05 21:19:24,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5922 to 5178. [2021-06-05 21:19:24,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5178 states, 5177 states have (on average 2.924666795441375) internal successors, (15141), 5177 states have internal predecessors, (15141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:24,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5178 states to 5178 states and 15141 transitions. [2021-06-05 21:19:24,094 INFO L78 Accepts]: Start accepts. Automaton has 5178 states and 15141 transitions. Word has length 22 [2021-06-05 21:19:24,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:24,094 INFO L482 AbstractCegarLoop]: Abstraction has 5178 states and 15141 transitions. [2021-06-05 21:19:24,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:24,094 INFO L276 IsEmpty]: Start isEmpty. Operand 5178 states and 15141 transitions. [2021-06-05 21:19:24,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:24,099 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:24,099 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:24,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2941 [2021-06-05 21:19:24,300 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:24,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:24,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1916893863, now seen corresponding path program 229 times [2021-06-05 21:19:24,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:24,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019175696] [2021-06-05 21:19:24,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:24,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:24,352 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:19:24,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:24,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019175696] [2021-06-05 21:19:24,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019175696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:24,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553019528] [2021-06-05 21:19:24,352 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:24,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:24,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:24,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:24,412 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:19:24,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553019528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:24,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:24,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:19:24,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850246269] [2021-06-05 21:19:24,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:19:24,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:24,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:19:24,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:19:24,413 INFO L87 Difference]: Start difference. First operand 5178 states and 15141 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:24,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:24,493 INFO L93 Difference]: Finished difference Result 8667 states and 25108 transitions. [2021-06-05 21:19:24,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:19:24,493 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:24,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:24,503 INFO L225 Difference]: With dead ends: 8667 [2021-06-05 21:19:24,503 INFO L226 Difference]: Without dead ends: 8667 [2021-06-05 21:19:24,504 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 63.3ms TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:19:24,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8667 states. [2021-06-05 21:19:24,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8667 to 8167. [2021-06-05 21:19:24,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8167 states, 8166 states have (on average 2.984570168993387) internal successors, (24372), 8166 states have internal predecessors, (24372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:24,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8167 states to 8167 states and 24372 transitions. [2021-06-05 21:19:24,623 INFO L78 Accepts]: Start accepts. Automaton has 8167 states and 24372 transitions. Word has length 22 [2021-06-05 21:19:24,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:24,623 INFO L482 AbstractCegarLoop]: Abstraction has 8167 states and 24372 transitions. [2021-06-05 21:19:24,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:24,623 INFO L276 IsEmpty]: Start isEmpty. Operand 8167 states and 24372 transitions. [2021-06-05 21:19:24,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:24,632 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:24,632 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:24,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2942 [2021-06-05 21:19:24,832 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:24,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:24,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1840217855, now seen corresponding path program 230 times [2021-06-05 21:19:24,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:24,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105817157] [2021-06-05 21:19:24,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:24,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:24,892 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:24,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:24,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105817157] [2021-06-05 21:19:24,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105817157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:24,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10352681] [2021-06-05 21:19:24,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:24,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:19:24,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:24,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:24,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:24,955 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:24,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10352681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:24,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:24,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:19:24,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469899315] [2021-06-05 21:19:24,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:19:24,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:24,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:19:24,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:19:24,956 INFO L87 Difference]: Start difference. First operand 8167 states and 24372 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:25,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:25,081 INFO L93 Difference]: Finished difference Result 9066 states and 26143 transitions. [2021-06-05 21:19:25,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:19:25,082 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:25,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:25,093 INFO L225 Difference]: With dead ends: 9066 [2021-06-05 21:19:25,093 INFO L226 Difference]: Without dead ends: 9066 [2021-06-05 21:19:25,093 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 97.4ms TimeCoverageRelationStatistics Valid=164, Invalid=298, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:19:25,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9066 states. [2021-06-05 21:19:25,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9066 to 8041. [2021-06-05 21:19:25,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8041 states, 8040 states have (on average 2.981218905472637) internal successors, (23969), 8040 states have internal predecessors, (23969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:25,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8041 states to 8041 states and 23969 transitions. [2021-06-05 21:19:25,213 INFO L78 Accepts]: Start accepts. Automaton has 8041 states and 23969 transitions. Word has length 22 [2021-06-05 21:19:25,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:25,213 INFO L482 AbstractCegarLoop]: Abstraction has 8041 states and 23969 transitions. [2021-06-05 21:19:25,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:25,213 INFO L276 IsEmpty]: Start isEmpty. Operand 8041 states and 23969 transitions. [2021-06-05 21:19:25,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:25,221 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:25,221 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:25,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2943,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:25,421 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:25,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:25,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1948403175, now seen corresponding path program 231 times [2021-06-05 21:19:25,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:25,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246062984] [2021-06-05 21:19:25,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:25,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:25,486 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:25,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:25,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246062984] [2021-06-05 21:19:25,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246062984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:25,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305658911] [2021-06-05 21:19:25,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:25,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:19:25,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:25,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:25,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:25,550 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:25,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305658911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:25,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:25,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:19:25,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604260490] [2021-06-05 21:19:25,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:19:25,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:25,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:19:25,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:19:25,551 INFO L87 Difference]: Start difference. First operand 8041 states and 23969 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:25,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:25,739 INFO L93 Difference]: Finished difference Result 12727 states and 37454 transitions. [2021-06-05 21:19:25,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:19:25,739 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:25,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:25,757 INFO L225 Difference]: With dead ends: 12727 [2021-06-05 21:19:25,757 INFO L226 Difference]: Without dead ends: 12727 [2021-06-05 21:19:25,757 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 145.5ms TimeCoverageRelationStatistics Valid=264, Invalid=492, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:19:25,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12727 states. [2021-06-05 21:19:25,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12727 to 11269. [2021-06-05 21:19:25,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11269 states, 11268 states have (on average 3.0277777777777777) internal successors, (34117), 11268 states have internal predecessors, (34117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:25,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11269 states to 11269 states and 34117 transitions. [2021-06-05 21:19:25,938 INFO L78 Accepts]: Start accepts. Automaton has 11269 states and 34117 transitions. Word has length 22 [2021-06-05 21:19:25,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:25,938 INFO L482 AbstractCegarLoop]: Abstraction has 11269 states and 34117 transitions. [2021-06-05 21:19:25,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:25,938 INFO L276 IsEmpty]: Start isEmpty. Operand 11269 states and 34117 transitions. [2021-06-05 21:19:25,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:25,948 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:25,948 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:26,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2944 [2021-06-05 21:19:26,149 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:26,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:26,149 INFO L82 PathProgramCache]: Analyzing trace with hash 2063972437, now seen corresponding path program 232 times [2021-06-05 21:19:26,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:26,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900834589] [2021-06-05 21:19:26,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:26,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:26,205 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:19:26,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:26,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900834589] [2021-06-05 21:19:26,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900834589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:26,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646953117] [2021-06-05 21:19:26,205 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:26,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:19:26,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:26,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:26,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:26,267 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:19:26,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646953117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:26,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:26,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:19:26,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711706258] [2021-06-05 21:19:26,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:19:26,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:26,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:19:26,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:19:26,268 INFO L87 Difference]: Start difference. First operand 11269 states and 34117 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:26,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:26,356 INFO L93 Difference]: Finished difference Result 11783 states and 35094 transitions. [2021-06-05 21:19:26,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:19:26,357 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:26,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:26,371 INFO L225 Difference]: With dead ends: 11783 [2021-06-05 21:19:26,371 INFO L226 Difference]: Without dead ends: 11783 [2021-06-05 21:19:26,371 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 66.2ms TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:19:26,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11783 states. [2021-06-05 21:19:26,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11783 to 11255. [2021-06-05 21:19:26,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11255 states, 11254 states have (on average 3.027368046916652) internal successors, (34070), 11254 states have internal predecessors, (34070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:26,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11255 states to 11255 states and 34070 transitions. [2021-06-05 21:19:26,546 INFO L78 Accepts]: Start accepts. Automaton has 11255 states and 34070 transitions. Word has length 22 [2021-06-05 21:19:26,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:26,546 INFO L482 AbstractCegarLoop]: Abstraction has 11255 states and 34070 transitions. [2021-06-05 21:19:26,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:26,546 INFO L276 IsEmpty]: Start isEmpty. Operand 11255 states and 34070 transitions. [2021-06-05 21:19:26,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:26,555 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:26,555 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:26,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2945,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:26,756 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:26,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:26,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1693139281, now seen corresponding path program 233 times [2021-06-05 21:19:26,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:26,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901513659] [2021-06-05 21:19:26,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:26,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:26,815 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:26,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:26,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901513659] [2021-06-05 21:19:26,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901513659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:26,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667952348] [2021-06-05 21:19:26,816 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:26,843 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:19:26,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:26,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:26,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:26,881 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:26,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667952348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:26,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:26,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:19:26,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344075619] [2021-06-05 21:19:26,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:19:26,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:26,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:19:26,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:19:26,882 INFO L87 Difference]: Start difference. First operand 11255 states and 34070 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:27,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:27,027 INFO L93 Difference]: Finished difference Result 12824 states and 38032 transitions. [2021-06-05 21:19:27,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:19:27,027 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:27,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:27,045 INFO L225 Difference]: With dead ends: 12824 [2021-06-05 21:19:27,045 INFO L226 Difference]: Without dead ends: 12824 [2021-06-05 21:19:27,046 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 95.9ms TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:19:27,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12824 states. [2021-06-05 21:19:27,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12824 to 7201. [2021-06-05 21:19:27,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7201 states, 7200 states have (on average 2.9608333333333334) internal successors, (21318), 7200 states have internal predecessors, (21318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:27,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7201 states to 7201 states and 21318 transitions. [2021-06-05 21:19:27,192 INFO L78 Accepts]: Start accepts. Automaton has 7201 states and 21318 transitions. Word has length 22 [2021-06-05 21:19:27,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:27,192 INFO L482 AbstractCegarLoop]: Abstraction has 7201 states and 21318 transitions. [2021-06-05 21:19:27,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:27,192 INFO L276 IsEmpty]: Start isEmpty. Operand 7201 states and 21318 transitions. [2021-06-05 21:19:27,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:27,198 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:27,198 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:27,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2946 [2021-06-05 21:19:27,401 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:27,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:27,401 INFO L82 PathProgramCache]: Analyzing trace with hash 2095481749, now seen corresponding path program 234 times [2021-06-05 21:19:27,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:27,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267810481] [2021-06-05 21:19:27,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:27,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:27,470 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:27,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:27,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267810481] [2021-06-05 21:19:27,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267810481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:27,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717359614] [2021-06-05 21:19:27,471 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:27,496 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:19:27,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:27,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:27,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:27,534 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:27,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717359614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:27,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:27,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:19:27,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001440189] [2021-06-05 21:19:27,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:19:27,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:27,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:19:27,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:19:27,535 INFO L87 Difference]: Start difference. First operand 7201 states and 21318 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:27,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:27,723 INFO L93 Difference]: Finished difference Result 10561 states and 30382 transitions. [2021-06-05 21:19:27,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:19:27,724 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:27,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:27,738 INFO L225 Difference]: With dead ends: 10561 [2021-06-05 21:19:27,738 INFO L226 Difference]: Without dead ends: 10561 [2021-06-05 21:19:27,738 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 142.6ms TimeCoverageRelationStatistics Valid=263, Invalid=493, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:19:27,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10561 states. [2021-06-05 21:19:27,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10561 to 6109. [2021-06-05 21:19:27,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6109 states, 6108 states have (on average 2.947282252783235) internal successors, (18002), 6108 states have internal predecessors, (18002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:27,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6109 states to 6109 states and 18002 transitions. [2021-06-05 21:19:27,858 INFO L78 Accepts]: Start accepts. Automaton has 6109 states and 18002 transitions. Word has length 22 [2021-06-05 21:19:27,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:27,859 INFO L482 AbstractCegarLoop]: Abstraction has 6109 states and 18002 transitions. [2021-06-05 21:19:27,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:27,859 INFO L276 IsEmpty]: Start isEmpty. Operand 6109 states and 18002 transitions. [2021-06-05 21:19:27,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:27,865 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:27,865 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:28,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2947,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:28,066 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:28,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:28,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1959701393, now seen corresponding path program 235 times [2021-06-05 21:19:28,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:28,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441556374] [2021-06-05 21:19:28,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:28,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:28,106 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:19:28,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:28,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441556374] [2021-06-05 21:19:28,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441556374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:28,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603623842] [2021-06-05 21:19:28,107 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:28,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:28,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:28,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:28,178 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:19:28,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603623842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:28,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:28,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 21:19:28,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652421015] [2021-06-05 21:19:28,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:19:28,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:28,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:19:28,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:19:28,179 INFO L87 Difference]: Start difference. First operand 6109 states and 18002 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:28,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:28,340 INFO L93 Difference]: Finished difference Result 6375 states and 18328 transitions. [2021-06-05 21:19:28,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:19:28,340 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:28,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:28,347 INFO L225 Difference]: With dead ends: 6375 [2021-06-05 21:19:28,347 INFO L226 Difference]: Without dead ends: 6371 [2021-06-05 21:19:28,348 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 95.9ms TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:19:28,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6371 states. [2021-06-05 21:19:28,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6371 to 6109. [2021-06-05 21:19:28,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6109 states, 6108 states have (on average 2.9466273739358217) internal successors, (17998), 6108 states have internal predecessors, (17998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:28,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6109 states to 6109 states and 17998 transitions. [2021-06-05 21:19:28,417 INFO L78 Accepts]: Start accepts. Automaton has 6109 states and 17998 transitions. Word has length 22 [2021-06-05 21:19:28,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:28,417 INFO L482 AbstractCegarLoop]: Abstraction has 6109 states and 17998 transitions. [2021-06-05 21:19:28,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:28,417 INFO L276 IsEmpty]: Start isEmpty. Operand 6109 states and 17998 transitions. [2021-06-05 21:19:28,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:28,422 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:28,422 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:28,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2948,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:28,623 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:28,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:28,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1459014895, now seen corresponding path program 236 times [2021-06-05 21:19:28,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:28,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091678592] [2021-06-05 21:19:28,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:28,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:28,686 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:28,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:28,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091678592] [2021-06-05 21:19:28,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091678592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:28,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195262828] [2021-06-05 21:19:28,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:28,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:19:28,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:28,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:28,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:28,755 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:28,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195262828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:28,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:28,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:19:28,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669233745] [2021-06-05 21:19:28,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:19:28,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:28,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:19:28,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:19:28,756 INFO L87 Difference]: Start difference. First operand 6109 states and 17998 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:28,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:28,922 INFO L93 Difference]: Finished difference Result 7567 states and 21448 transitions. [2021-06-05 21:19:28,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:19:28,922 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:28,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:28,931 INFO L225 Difference]: With dead ends: 7567 [2021-06-05 21:19:28,931 INFO L226 Difference]: Without dead ends: 7567 [2021-06-05 21:19:28,931 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 140.6ms TimeCoverageRelationStatistics Valid=266, Invalid=490, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:19:28,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7567 states. [2021-06-05 21:19:28,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7567 to 4949. [2021-06-05 21:19:29,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4949 states, 4948 states have (on average 2.927445432497979) internal successors, (14485), 4948 states have internal predecessors, (14485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:29,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4949 states to 4949 states and 14485 transitions. [2021-06-05 21:19:29,009 INFO L78 Accepts]: Start accepts. Automaton has 4949 states and 14485 transitions. Word has length 22 [2021-06-05 21:19:29,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:29,009 INFO L482 AbstractCegarLoop]: Abstraction has 4949 states and 14485 transitions. [2021-06-05 21:19:29,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:29,009 INFO L276 IsEmpty]: Start isEmpty. Operand 4949 states and 14485 transitions. [2021-06-05 21:19:29,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:29,013 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:29,013 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:29,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2949,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:29,214 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:29,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:29,214 INFO L82 PathProgramCache]: Analyzing trace with hash -2062760815, now seen corresponding path program 237 times [2021-06-05 21:19:29,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:29,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774104886] [2021-06-05 21:19:29,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:29,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:29,261 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:29,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:29,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774104886] [2021-06-05 21:19:29,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774104886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:29,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396436301] [2021-06-05 21:19:29,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:29,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:19:29,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:29,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:29,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:29,322 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:19:29,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396436301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:29,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:29,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:19:29,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671102981] [2021-06-05 21:19:29,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:19:29,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:29,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:19:29,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:19:29,323 INFO L87 Difference]: Start difference. First operand 4949 states and 14485 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:29,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:29,456 INFO L93 Difference]: Finished difference Result 5274 states and 14931 transitions. [2021-06-05 21:19:29,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:19:29,456 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:29,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:29,461 INFO L225 Difference]: With dead ends: 5274 [2021-06-05 21:19:29,461 INFO L226 Difference]: Without dead ends: 5270 [2021-06-05 21:19:29,461 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 93.4ms TimeCoverageRelationStatistics Valid=171, Invalid=291, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:19:29,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5270 states. [2021-06-05 21:19:29,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5270 to 4961. [2021-06-05 21:19:29,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4961 states, 4960 states have (on average 2.926209677419355) internal successors, (14514), 4960 states have internal predecessors, (14514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:29,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4961 states to 4961 states and 14514 transitions. [2021-06-05 21:19:29,518 INFO L78 Accepts]: Start accepts. Automaton has 4961 states and 14514 transitions. Word has length 22 [2021-06-05 21:19:29,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:29,518 INFO L482 AbstractCegarLoop]: Abstraction has 4961 states and 14514 transitions. [2021-06-05 21:19:29,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:29,518 INFO L276 IsEmpty]: Start isEmpty. Operand 4961 states and 14514 transitions. [2021-06-05 21:19:29,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:29,522 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:29,522 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:29,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2950 [2021-06-05 21:19:29,723 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:29,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:29,723 INFO L82 PathProgramCache]: Analyzing trace with hash -345011755, now seen corresponding path program 238 times [2021-06-05 21:19:29,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:29,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332892283] [2021-06-05 21:19:29,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:29,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:29,768 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:29,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:29,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332892283] [2021-06-05 21:19:29,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332892283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:29,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960092615] [2021-06-05 21:19:29,768 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:29,791 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:19:29,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:29,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:29,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:29,843 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 28 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:29,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960092615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:29,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:29,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:19:29,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599777565] [2021-06-05 21:19:29,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:19:29,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:29,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:19:29,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:19:29,844 INFO L87 Difference]: Start difference. First operand 4961 states and 14514 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:29,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:29,935 INFO L93 Difference]: Finished difference Result 5690 states and 15948 transitions. [2021-06-05 21:19:29,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:19:29,935 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:29,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:29,941 INFO L225 Difference]: With dead ends: 5690 [2021-06-05 21:19:29,941 INFO L226 Difference]: Without dead ends: 5690 [2021-06-05 21:19:29,941 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 64.3ms TimeCoverageRelationStatistics Valid=111, Invalid=161, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:19:29,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5690 states. [2021-06-05 21:19:29,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5690 to 4969. [2021-06-05 21:19:29,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4969 states, 4968 states have (on average 2.9253220611916264) internal successors, (14533), 4968 states have internal predecessors, (14533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:30,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4969 states to 4969 states and 14533 transitions. [2021-06-05 21:19:30,005 INFO L78 Accepts]: Start accepts. Automaton has 4969 states and 14533 transitions. Word has length 22 [2021-06-05 21:19:30,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:30,005 INFO L482 AbstractCegarLoop]: Abstraction has 4969 states and 14533 transitions. [2021-06-05 21:19:30,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:30,005 INFO L276 IsEmpty]: Start isEmpty. Operand 4969 states and 14533 transitions. [2021-06-05 21:19:30,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:30,010 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:30,010 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:30,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2951 [2021-06-05 21:19:30,211 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:30,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:30,211 INFO L82 PathProgramCache]: Analyzing trace with hash -2074059089, now seen corresponding path program 239 times [2021-06-05 21:19:30,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:30,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438079014] [2021-06-05 21:19:30,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:30,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:30,258 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:19:30,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:30,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438079014] [2021-06-05 21:19:30,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438079014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:30,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873029966] [2021-06-05 21:19:30,259 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:30,283 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:19:30,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:30,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:30,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:30,326 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:19:30,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873029966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:30,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:30,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:19:30,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300012501] [2021-06-05 21:19:30,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:19:30,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:30,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:19:30,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:19:30,341 INFO L87 Difference]: Start difference. First operand 4969 states and 14533 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:30,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:30,452 INFO L93 Difference]: Finished difference Result 5878 states and 16463 transitions. [2021-06-05 21:19:30,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:19:30,452 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:30,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:30,459 INFO L225 Difference]: With dead ends: 5878 [2021-06-05 21:19:30,459 INFO L226 Difference]: Without dead ends: 5878 [2021-06-05 21:19:30,459 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 80.4ms TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:19:30,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5878 states. [2021-06-05 21:19:30,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5878 to 4973. [2021-06-05 21:19:30,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4973 states, 4972 states have (on average 2.924979887369268) internal successors, (14543), 4972 states have internal predecessors, (14543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:30,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4973 states to 4973 states and 14543 transitions. [2021-06-05 21:19:30,525 INFO L78 Accepts]: Start accepts. Automaton has 4973 states and 14543 transitions. Word has length 22 [2021-06-05 21:19:30,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:30,525 INFO L482 AbstractCegarLoop]: Abstraction has 4973 states and 14543 transitions. [2021-06-05 21:19:30,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:30,525 INFO L276 IsEmpty]: Start isEmpty. Operand 4973 states and 14543 transitions. [2021-06-05 21:19:30,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:30,530 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:30,530 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:30,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2952,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:30,730 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:30,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:30,730 INFO L82 PathProgramCache]: Analyzing trace with hash 160048405, now seen corresponding path program 240 times [2021-06-05 21:19:30,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:30,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855129243] [2021-06-05 21:19:30,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:30,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:30,810 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:30,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:30,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855129243] [2021-06-05 21:19:30,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855129243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:30,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621823243] [2021-06-05 21:19:30,810 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:30,834 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:19:30,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:30,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:30,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:30,883 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:30,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621823243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:30,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:30,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:19:30,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509090370] [2021-06-05 21:19:30,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:19:30,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:30,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:19:30,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:19:30,884 INFO L87 Difference]: Start difference. First operand 4973 states and 14543 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:30,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:30,986 INFO L93 Difference]: Finished difference Result 5765 states and 16200 transitions. [2021-06-05 21:19:30,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:19:30,986 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:30,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:30,991 INFO L225 Difference]: With dead ends: 5765 [2021-06-05 21:19:30,992 INFO L226 Difference]: Without dead ends: 5765 [2021-06-05 21:19:30,992 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 113.4ms TimeCoverageRelationStatistics Valid=154, Invalid=266, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:19:30,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5765 states. [2021-06-05 21:19:31,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5765 to 4919. [2021-06-05 21:19:31,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4919 states, 4918 states have (on average 2.9217161447742983) internal successors, (14369), 4918 states have internal predecessors, (14369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:31,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4919 states to 4919 states and 14369 transitions. [2021-06-05 21:19:31,056 INFO L78 Accepts]: Start accepts. Automaton has 4919 states and 14369 transitions. Word has length 22 [2021-06-05 21:19:31,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:31,056 INFO L482 AbstractCegarLoop]: Abstraction has 4919 states and 14369 transitions. [2021-06-05 21:19:31,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:31,056 INFO L276 IsEmpty]: Start isEmpty. Operand 4919 states and 14369 transitions. [2021-06-05 21:19:31,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:31,060 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:31,060 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:31,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2953,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:31,261 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:31,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:31,261 INFO L82 PathProgramCache]: Analyzing trace with hash 697903983, now seen corresponding path program 241 times [2021-06-05 21:19:31,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:31,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137640537] [2021-06-05 21:19:31,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:31,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:31,317 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:19:31,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:31,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137640537] [2021-06-05 21:19:31,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137640537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:31,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782976960] [2021-06-05 21:19:31,318 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:31,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:31,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:31,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:31,384 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:19:31,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782976960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:31,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:31,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:19:31,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612860497] [2021-06-05 21:19:31,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:19:31,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:31,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:19:31,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:19:31,385 INFO L87 Difference]: Start difference. First operand 4919 states and 14369 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:31,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:31,479 INFO L93 Difference]: Finished difference Result 8014 states and 23033 transitions. [2021-06-05 21:19:31,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:19:31,479 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:31,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:31,488 INFO L225 Difference]: With dead ends: 8014 [2021-06-05 21:19:31,488 INFO L226 Difference]: Without dead ends: 8014 [2021-06-05 21:19:31,489 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 79.5ms TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:19:31,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8014 states. [2021-06-05 21:19:31,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8014 to 7160. [2021-06-05 21:19:31,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7160 states, 7159 states have (on average 2.966894817711971) internal successors, (21240), 7159 states have internal predecessors, (21240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:31,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7160 states to 7160 states and 21240 transitions. [2021-06-05 21:19:31,586 INFO L78 Accepts]: Start accepts. Automaton has 7160 states and 21240 transitions. Word has length 22 [2021-06-05 21:19:31,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:31,586 INFO L482 AbstractCegarLoop]: Abstraction has 7160 states and 21240 transitions. [2021-06-05 21:19:31,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:31,586 INFO L276 IsEmpty]: Start isEmpty. Operand 7160 states and 21240 transitions. [2021-06-05 21:19:31,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:31,592 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:31,592 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:31,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2954 [2021-06-05 21:19:31,792 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:31,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:31,793 INFO L82 PathProgramCache]: Analyzing trace with hash 191557717, now seen corresponding path program 242 times [2021-06-05 21:19:31,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:31,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857398386] [2021-06-05 21:19:31,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:31,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:31,857 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:31,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:31,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857398386] [2021-06-05 21:19:31,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857398386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:31,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717051572] [2021-06-05 21:19:31,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:31,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:19:31,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:31,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:31,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:31,924 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:31,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717051572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:31,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:31,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:19:31,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160829405] [2021-06-05 21:19:31,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:19:31,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:31,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:19:31,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:19:31,925 INFO L87 Difference]: Start difference. First operand 7160 states and 21240 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:32,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:32,069 INFO L93 Difference]: Finished difference Result 8322 states and 23810 transitions. [2021-06-05 21:19:32,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:19:32,070 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:32,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:32,079 INFO L225 Difference]: With dead ends: 8322 [2021-06-05 21:19:32,079 INFO L226 Difference]: Without dead ends: 8322 [2021-06-05 21:19:32,079 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 118.0ms TimeCoverageRelationStatistics Valid=206, Invalid=394, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:19:32,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8322 states. [2021-06-05 21:19:32,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8322 to 7016. [2021-06-05 21:19:32,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7016 states, 7015 states have (on average 2.9642195295794727) internal successors, (20794), 7015 states have internal predecessors, (20794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:32,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7016 states to 7016 states and 20794 transitions. [2021-06-05 21:19:32,182 INFO L78 Accepts]: Start accepts. Automaton has 7016 states and 20794 transitions. Word has length 22 [2021-06-05 21:19:32,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:32,182 INFO L482 AbstractCegarLoop]: Abstraction has 7016 states and 20794 transitions. [2021-06-05 21:19:32,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:32,182 INFO L276 IsEmpty]: Start isEmpty. Operand 7016 states and 20794 transitions. [2021-06-05 21:19:32,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:32,189 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:32,189 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:32,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2955,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:32,390 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:32,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:32,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1674692655, now seen corresponding path program 243 times [2021-06-05 21:19:32,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:32,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600212629] [2021-06-05 21:19:32,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:32,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:32,458 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:32,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:32,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600212629] [2021-06-05 21:19:32,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600212629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:32,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220895507] [2021-06-05 21:19:32,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:32,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:19:32,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:32,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:32,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:32,529 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:32,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220895507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:32,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:32,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:19:32,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900220711] [2021-06-05 21:19:32,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:19:32,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:32,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:19:32,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:19:32,530 INFO L87 Difference]: Start difference. First operand 7016 states and 20794 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:32,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:32,751 INFO L93 Difference]: Finished difference Result 10804 states and 31397 transitions. [2021-06-05 21:19:32,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:19:32,751 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:32,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:32,761 INFO L225 Difference]: With dead ends: 10804 [2021-06-05 21:19:32,761 INFO L226 Difference]: Without dead ends: 10804 [2021-06-05 21:19:32,761 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 188.9ms TimeCoverageRelationStatistics Valid=363, Invalid=693, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:19:32,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10804 states. [2021-06-05 21:19:32,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10804 to 8931. [2021-06-05 21:19:32,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8931 states, 8930 states have (on average 3.0094064949608064) internal successors, (26874), 8930 states have internal predecessors, (26874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:32,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8931 states to 8931 states and 26874 transitions. [2021-06-05 21:19:32,871 INFO L78 Accepts]: Start accepts. Automaton has 8931 states and 26874 transitions. Word has length 22 [2021-06-05 21:19:32,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:32,872 INFO L482 AbstractCegarLoop]: Abstraction has 8931 states and 26874 transitions. [2021-06-05 21:19:32,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:32,872 INFO L276 IsEmpty]: Start isEmpty. Operand 8931 states and 26874 transitions. [2021-06-05 21:19:32,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:32,878 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:32,878 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:33,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2956 [2021-06-05 21:19:33,079 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:33,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:33,079 INFO L82 PathProgramCache]: Analyzing trace with hash 962372481, now seen corresponding path program 244 times [2021-06-05 21:19:33,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:33,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156910305] [2021-06-05 21:19:33,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:33,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:33,138 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:19:33,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:33,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156910305] [2021-06-05 21:19:33,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156910305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:33,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299322569] [2021-06-05 21:19:33,138 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:33,161 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:19:33,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:33,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:33,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:33,198 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:19:33,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299322569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:33,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:33,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:19:33,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835252814] [2021-06-05 21:19:33,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:19:33,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:33,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:19:33,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:19:33,199 INFO L87 Difference]: Start difference. First operand 8931 states and 26874 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:33,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:33,296 INFO L93 Difference]: Finished difference Result 9250 states and 27288 transitions. [2021-06-05 21:19:33,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:19:33,296 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:33,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:33,307 INFO L225 Difference]: With dead ends: 9250 [2021-06-05 21:19:33,307 INFO L226 Difference]: Without dead ends: 9249 [2021-06-05 21:19:33,307 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 77.0ms TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:19:33,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9249 states. [2021-06-05 21:19:33,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9249 to 8667. [2021-06-05 21:19:33,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8667 states, 8666 states have (on average 3.0012693284098777) internal successors, (26009), 8666 states have internal predecessors, (26009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:33,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8667 states to 8667 states and 26009 transitions. [2021-06-05 21:19:33,434 INFO L78 Accepts]: Start accepts. Automaton has 8667 states and 26009 transitions. Word has length 22 [2021-06-05 21:19:33,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:33,434 INFO L482 AbstractCegarLoop]: Abstraction has 8667 states and 26009 transitions. [2021-06-05 21:19:33,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:33,434 INFO L276 IsEmpty]: Start isEmpty. Operand 8667 states and 26009 transitions. [2021-06-05 21:19:33,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:33,443 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:33,443 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:33,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2957,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:33,649 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:33,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:33,649 INFO L82 PathProgramCache]: Analyzing trace with hash 456026215, now seen corresponding path program 245 times [2021-06-05 21:19:33,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:33,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884281237] [2021-06-05 21:19:33,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:33,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:33,716 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:33,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:33,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884281237] [2021-06-05 21:19:33,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884281237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:33,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962080112] [2021-06-05 21:19:33,716 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:33,740 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:19:33,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:33,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:33,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:33,778 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:33,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962080112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:33,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:33,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:19:33,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243761894] [2021-06-05 21:19:33,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:19:33,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:33,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:19:33,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:19:33,779 INFO L87 Difference]: Start difference. First operand 8667 states and 26009 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:33,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:33,928 INFO L93 Difference]: Finished difference Result 9868 states and 29015 transitions. [2021-06-05 21:19:33,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:19:33,928 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:33,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:33,941 INFO L225 Difference]: With dead ends: 9868 [2021-06-05 21:19:33,941 INFO L226 Difference]: Without dead ends: 9868 [2021-06-05 21:19:33,941 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 119.2ms TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:19:33,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9868 states. [2021-06-05 21:19:34,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9868 to 6055. [2021-06-05 21:19:34,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6055 states, 6054 states have (on average 2.9398744631648497) internal successors, (17798), 6054 states have internal predecessors, (17798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:34,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6055 states to 6055 states and 17798 transitions. [2021-06-05 21:19:34,037 INFO L78 Accepts]: Start accepts. Automaton has 6055 states and 17798 transitions. Word has length 22 [2021-06-05 21:19:34,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:34,037 INFO L482 AbstractCegarLoop]: Abstraction has 6055 states and 17798 transitions. [2021-06-05 21:19:34,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:34,037 INFO L276 IsEmpty]: Start isEmpty. Operand 6055 states and 17798 transitions. [2021-06-05 21:19:34,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:34,042 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:34,042 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:34,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2958,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:34,243 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:34,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:34,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1939161153, now seen corresponding path program 246 times [2021-06-05 21:19:34,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:34,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127606210] [2021-06-05 21:19:34,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:34,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:34,313 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:34,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:34,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127606210] [2021-06-05 21:19:34,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127606210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:34,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634579808] [2021-06-05 21:19:34,314 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:34,338 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:19:34,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:34,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:34,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:34,376 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:34,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634579808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:34,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:34,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:19:34,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347951383] [2021-06-05 21:19:34,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:19:34,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:34,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:19:34,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:19:34,377 INFO L87 Difference]: Start difference. First operand 6055 states and 17798 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:34,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:34,609 INFO L93 Difference]: Finished difference Result 8378 states and 23833 transitions. [2021-06-05 21:19:34,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:19:34,609 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:34,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:34,619 INFO L225 Difference]: With dead ends: 8378 [2021-06-05 21:19:34,619 INFO L226 Difference]: Without dead ends: 8378 [2021-06-05 21:19:34,619 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 182.5ms TimeCoverageRelationStatistics Valid=362, Invalid=694, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:19:34,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8378 states. [2021-06-05 21:19:34,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8378 to 4616. [2021-06-05 21:19:34,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4616 states, 4615 states have (on average 2.9371614301191764) internal successors, (13555), 4615 states have internal predecessors, (13555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:34,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4616 states to 4616 states and 13555 transitions. [2021-06-05 21:19:34,720 INFO L78 Accepts]: Start accepts. Automaton has 4616 states and 13555 transitions. Word has length 22 [2021-06-05 21:19:34,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:34,720 INFO L482 AbstractCegarLoop]: Abstraction has 4616 states and 13555 transitions. [2021-06-05 21:19:34,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:34,720 INFO L276 IsEmpty]: Start isEmpty. Operand 4616 states and 13555 transitions. [2021-06-05 21:19:34,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:34,725 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:34,725 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:34,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2959,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:34,927 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:34,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:34,928 INFO L82 PathProgramCache]: Analyzing trace with hash -611442137, now seen corresponding path program 247 times [2021-06-05 21:19:34,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:34,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448419898] [2021-06-05 21:19:34,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:34,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:34,997 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:34,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:34,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448419898] [2021-06-05 21:19:34,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448419898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:34,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653799298] [2021-06-05 21:19:34,997 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:35,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:35,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:35,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:35,058 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:35,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653799298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:35,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:35,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:19:35,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148511634] [2021-06-05 21:19:35,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:19:35,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:35,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:19:35,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:19:35,059 INFO L87 Difference]: Start difference. First operand 4616 states and 13555 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:35,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:35,257 INFO L93 Difference]: Finished difference Result 7421 states and 21200 transitions. [2021-06-05 21:19:35,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:19:35,257 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:35,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:35,266 INFO L225 Difference]: With dead ends: 7421 [2021-06-05 21:19:35,266 INFO L226 Difference]: Without dead ends: 7421 [2021-06-05 21:19:35,266 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 162.0ms TimeCoverageRelationStatistics Valid=319, Invalid=611, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:19:35,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7421 states. [2021-06-05 21:19:35,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7421 to 6529. [2021-06-05 21:19:35,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6529 states, 6528 states have (on average 2.9543504901960786) internal successors, (19286), 6528 states have internal predecessors, (19286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:35,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6529 states to 6529 states and 19286 transitions. [2021-06-05 21:19:35,358 INFO L78 Accepts]: Start accepts. Automaton has 6529 states and 19286 transitions. Word has length 22 [2021-06-05 21:19:35,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:35,358 INFO L482 AbstractCegarLoop]: Abstraction has 6529 states and 19286 transitions. [2021-06-05 21:19:35,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:35,358 INFO L276 IsEmpty]: Start isEmpty. Operand 6529 states and 19286 transitions. [2021-06-05 21:19:35,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:35,364 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:35,364 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:35,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2960 [2021-06-05 21:19:35,565 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:35,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:35,565 INFO L82 PathProgramCache]: Analyzing trace with hash -690395165, now seen corresponding path program 248 times [2021-06-05 21:19:35,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:35,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254647170] [2021-06-05 21:19:35,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:35,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:35,613 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:35,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:35,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254647170] [2021-06-05 21:19:35,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254647170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:35,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410143165] [2021-06-05 21:19:35,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:35,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:19:35,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:35,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:35,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:35,670 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:19:35,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410143165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:35,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:35,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:19:35,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470856667] [2021-06-05 21:19:35,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:19:35,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:35,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:19:35,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:19:35,671 INFO L87 Difference]: Start difference. First operand 6529 states and 19286 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:35,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:35,807 INFO L93 Difference]: Finished difference Result 6802 states and 19658 transitions. [2021-06-05 21:19:35,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:19:35,808 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:35,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:35,816 INFO L225 Difference]: With dead ends: 6802 [2021-06-05 21:19:35,816 INFO L226 Difference]: Without dead ends: 6798 [2021-06-05 21:19:35,816 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 91.0ms TimeCoverageRelationStatistics Valid=170, Invalid=292, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:19:35,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6798 states. [2021-06-05 21:19:35,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6798 to 6498. [2021-06-05 21:19:35,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6498 states, 6497 states have (on average 2.950592581191319) internal successors, (19170), 6497 states have internal predecessors, (19170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:35,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6498 states to 6498 states and 19170 transitions. [2021-06-05 21:19:35,911 INFO L78 Accepts]: Start accepts. Automaton has 6498 states and 19170 transitions. Word has length 22 [2021-06-05 21:19:35,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:35,911 INFO L482 AbstractCegarLoop]: Abstraction has 6498 states and 19170 transitions. [2021-06-05 21:19:35,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:35,911 INFO L276 IsEmpty]: Start isEmpty. Operand 6498 states and 19170 transitions. [2021-06-05 21:19:35,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:35,917 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:35,917 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:36,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2961 [2021-06-05 21:19:36,117 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:36,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:36,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1027353895, now seen corresponding path program 249 times [2021-06-05 21:19:36,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:36,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090215965] [2021-06-05 21:19:36,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:36,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:36,163 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:19:36,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:36,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090215965] [2021-06-05 21:19:36,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090215965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:36,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184180896] [2021-06-05 21:19:36,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:36,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:19:36,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:36,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:36,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:36,224 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:19:36,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184180896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:36,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:36,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:19:36,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823464688] [2021-06-05 21:19:36,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:19:36,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:36,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:19:36,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:19:36,225 INFO L87 Difference]: Start difference. First operand 6498 states and 19170 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:36,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:36,316 INFO L93 Difference]: Finished difference Result 7322 states and 20998 transitions. [2021-06-05 21:19:36,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:19:36,317 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:36,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:36,324 INFO L225 Difference]: With dead ends: 7322 [2021-06-05 21:19:36,324 INFO L226 Difference]: Without dead ends: 7322 [2021-06-05 21:19:36,324 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 66.3ms TimeCoverageRelationStatistics Valid=122, Invalid=184, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:19:36,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7322 states. [2021-06-05 21:19:36,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7322 to 6505. [2021-06-05 21:19:36,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6505 states, 6504 states have (on average 2.950030750307503) internal successors, (19187), 6504 states have internal predecessors, (19187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:36,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6505 states to 6505 states and 19187 transitions. [2021-06-05 21:19:36,415 INFO L78 Accepts]: Start accepts. Automaton has 6505 states and 19187 transitions. Word has length 22 [2021-06-05 21:19:36,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:36,415 INFO L482 AbstractCegarLoop]: Abstraction has 6505 states and 19187 transitions. [2021-06-05 21:19:36,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:36,415 INFO L276 IsEmpty]: Start isEmpty. Operand 6505 states and 19187 transitions. [2021-06-05 21:19:36,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:36,421 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:36,421 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:36,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2962 [2021-06-05 21:19:36,622 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:36,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:36,622 INFO L82 PathProgramCache]: Analyzing trace with hash -701693439, now seen corresponding path program 250 times [2021-06-05 21:19:36,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:36,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435765175] [2021-06-05 21:19:36,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:36,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:36,674 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:36,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:36,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435765175] [2021-06-05 21:19:36,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435765175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:36,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630166603] [2021-06-05 21:19:36,674 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:36,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:19:36,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:36,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:36,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:36,738 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:36,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630166603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:36,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:36,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:19:36,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678271348] [2021-06-05 21:19:36,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:19:36,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:36,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:19:36,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:19:36,739 INFO L87 Difference]: Start difference. First operand 6505 states and 19187 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:36,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:36,860 INFO L93 Difference]: Finished difference Result 7657 states and 21924 transitions. [2021-06-05 21:19:36,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:19:36,861 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:36,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:36,868 INFO L225 Difference]: With dead ends: 7657 [2021-06-05 21:19:36,868 INFO L226 Difference]: Without dead ends: 7657 [2021-06-05 21:19:36,868 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 93.0ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:19:36,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7657 states. [2021-06-05 21:19:36,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7657 to 6280. [2021-06-05 21:19:36,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6280 states, 6279 states have (on average 2.94186972447842) internal successors, (18472), 6279 states have internal predecessors, (18472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:36,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6280 states to 6280 states and 18472 transitions. [2021-06-05 21:19:36,951 INFO L78 Accepts]: Start accepts. Automaton has 6280 states and 18472 transitions. Word has length 22 [2021-06-05 21:19:36,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:36,951 INFO L482 AbstractCegarLoop]: Abstraction has 6280 states and 18472 transitions. [2021-06-05 21:19:36,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:36,951 INFO L276 IsEmpty]: Start isEmpty. Operand 6280 states and 18472 transitions. [2021-06-05 21:19:36,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:36,956 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:36,956 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:37,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2963 [2021-06-05 21:19:37,157 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:37,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:37,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1532414055, now seen corresponding path program 251 times [2021-06-05 21:19:37,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:37,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91601193] [2021-06-05 21:19:37,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:37,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:37,211 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:19:37,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:37,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91601193] [2021-06-05 21:19:37,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91601193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:37,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791808688] [2021-06-05 21:19:37,212 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:37,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:19:37,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:37,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:37,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:37,274 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:19:37,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791808688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:37,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:37,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:19:37,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883651245] [2021-06-05 21:19:37,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:19:37,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:37,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:19:37,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:19:37,274 INFO L87 Difference]: Start difference. First operand 6280 states and 18472 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:37,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:37,401 INFO L93 Difference]: Finished difference Result 8774 states and 25325 transitions. [2021-06-05 21:19:37,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:19:37,401 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:37,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:37,412 INFO L225 Difference]: With dead ends: 8774 [2021-06-05 21:19:37,413 INFO L226 Difference]: Without dead ends: 8774 [2021-06-05 21:19:37,413 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 102.9ms TimeCoverageRelationStatistics Valid=183, Invalid=323, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:19:37,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8774 states. [2021-06-05 21:19:37,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8774 to 7854. [2021-06-05 21:19:37,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7854 states, 7853 states have (on average 2.9848465554565133) internal successors, (23440), 7853 states have internal predecessors, (23440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:37,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7854 states to 7854 states and 23440 transitions. [2021-06-05 21:19:37,532 INFO L78 Accepts]: Start accepts. Automaton has 7854 states and 23440 transitions. Word has length 22 [2021-06-05 21:19:37,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:37,533 INFO L482 AbstractCegarLoop]: Abstraction has 7854 states and 23440 transitions. [2021-06-05 21:19:37,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:37,533 INFO L276 IsEmpty]: Start isEmpty. Operand 7854 states and 23440 transitions. [2021-06-05 21:19:37,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:37,541 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:37,541 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:37,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2964 [2021-06-05 21:19:37,742 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:37,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:37,743 INFO L82 PathProgramCache]: Analyzing trace with hash 2070269633, now seen corresponding path program 252 times [2021-06-05 21:19:37,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:37,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044413831] [2021-06-05 21:19:37,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:37,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:37,804 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:37,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:37,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044413831] [2021-06-05 21:19:37,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044413831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:37,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105055032] [2021-06-05 21:19:37,804 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:37,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:19:37,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:37,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:37,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:37,867 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:37,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105055032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:37,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:37,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:19:37,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229871125] [2021-06-05 21:19:37,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:19:37,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:37,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:19:37,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:19:37,868 INFO L87 Difference]: Start difference. First operand 7854 states and 23440 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:37,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:37,991 INFO L93 Difference]: Finished difference Result 8525 states and 24660 transitions. [2021-06-05 21:19:37,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:19:37,993 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:37,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:38,004 INFO L225 Difference]: With dead ends: 8525 [2021-06-05 21:19:38,004 INFO L226 Difference]: Without dead ends: 8525 [2021-06-05 21:19:38,004 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 101.5ms TimeCoverageRelationStatistics Valid=176, Invalid=330, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:19:38,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8525 states. [2021-06-05 21:19:38,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8525 to 7170. [2021-06-05 21:19:38,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7170 states, 7169 states have (on average 2.9768447482215095) internal successors, (21341), 7169 states have internal predecessors, (21341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:38,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7170 states to 7170 states and 21341 transitions. [2021-06-05 21:19:38,116 INFO L78 Accepts]: Start accepts. Automaton has 7170 states and 21341 transitions. Word has length 22 [2021-06-05 21:19:38,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:38,116 INFO L482 AbstractCegarLoop]: Abstraction has 7170 states and 21341 transitions. [2021-06-05 21:19:38,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:38,117 INFO L276 IsEmpty]: Start isEmpty. Operand 7170 states and 21341 transitions. [2021-06-05 21:19:38,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:38,124 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:38,124 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:38,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2965,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:38,325 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:38,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:38,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1563923367, now seen corresponding path program 253 times [2021-06-05 21:19:38,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:38,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267350206] [2021-06-05 21:19:38,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:38,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:38,390 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:19:38,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:38,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267350206] [2021-06-05 21:19:38,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267350206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:38,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903603264] [2021-06-05 21:19:38,391 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:38,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:38,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:38,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:38,453 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:19:38,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903603264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:38,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:38,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:19:38,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484871809] [2021-06-05 21:19:38,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:19:38,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:38,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:19:38,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:19:38,454 INFO L87 Difference]: Start difference. First operand 7170 states and 21341 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:38,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:38,561 INFO L93 Difference]: Finished difference Result 10318 states and 30338 transitions. [2021-06-05 21:19:38,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:19:38,561 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:38,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:38,571 INFO L225 Difference]: With dead ends: 10318 [2021-06-05 21:19:38,571 INFO L226 Difference]: Without dead ends: 10318 [2021-06-05 21:19:38,571 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 94.3ms TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:19:38,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10318 states. [2021-06-05 21:19:38,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10318 to 9947. [2021-06-05 21:19:38,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9947 states, 9946 states have (on average 2.995475568067565) internal successors, (29793), 9946 states have internal predecessors, (29793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:38,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9947 states to 9947 states and 29793 transitions. [2021-06-05 21:19:38,748 INFO L78 Accepts]: Start accepts. Automaton has 9947 states and 29793 transitions. Word has length 22 [2021-06-05 21:19:38,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:38,748 INFO L482 AbstractCegarLoop]: Abstraction has 9947 states and 29793 transitions. [2021-06-05 21:19:38,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:38,748 INFO L276 IsEmpty]: Start isEmpty. Operand 9947 states and 29793 transitions. [2021-06-05 21:19:38,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:38,756 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:38,756 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:38,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2966,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:38,957 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:38,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:38,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1247908991, now seen corresponding path program 254 times [2021-06-05 21:19:38,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:38,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309947136] [2021-06-05 21:19:38,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:38,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:39,033 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:39,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:39,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309947136] [2021-06-05 21:19:39,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309947136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:39,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080340778] [2021-06-05 21:19:39,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:39,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:19:39,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:39,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:39,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:39,100 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:39,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080340778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:39,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:39,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:19:39,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727944861] [2021-06-05 21:19:39,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:19:39,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:39,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:19:39,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:19:39,101 INFO L87 Difference]: Start difference. First operand 9947 states and 29793 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:39,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:39,272 INFO L93 Difference]: Finished difference Result 10463 states and 30703 transitions. [2021-06-05 21:19:39,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:19:39,273 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:39,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:39,285 INFO L225 Difference]: With dead ends: 10463 [2021-06-05 21:19:39,285 INFO L226 Difference]: Without dead ends: 10463 [2021-06-05 21:19:39,285 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 143.5ms TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:19:39,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10463 states. [2021-06-05 21:19:39,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10463 to 9768. [2021-06-05 21:19:39,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9768 states, 9767 states have (on average 2.995392648715061) internal successors, (29256), 9767 states have internal predecessors, (29256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:39,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9768 states to 9768 states and 29256 transitions. [2021-06-05 21:19:39,421 INFO L78 Accepts]: Start accepts. Automaton has 9768 states and 29256 transitions. Word has length 22 [2021-06-05 21:19:39,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:39,421 INFO L482 AbstractCegarLoop]: Abstraction has 9768 states and 29256 transitions. [2021-06-05 21:19:39,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:39,422 INFO L276 IsEmpty]: Start isEmpty. Operand 9768 states and 29256 transitions. [2021-06-05 21:19:39,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:39,429 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:39,429 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:39,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2967,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:39,630 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:39,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:39,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1779601127, now seen corresponding path program 255 times [2021-06-05 21:19:39,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:39,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107595898] [2021-06-05 21:19:39,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:39,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:39,702 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:39,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:39,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107595898] [2021-06-05 21:19:39,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107595898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:39,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273725326] [2021-06-05 21:19:39,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:39,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:19:39,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:39,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:39,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:39,776 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:39,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273725326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:39,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:39,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:19:39,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993025333] [2021-06-05 21:19:39,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:19:39,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:39,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:19:39,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:19:39,777 INFO L87 Difference]: Start difference. First operand 9768 states and 29256 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:40,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:40,042 INFO L93 Difference]: Finished difference Result 11837 states and 34803 transitions. [2021-06-05 21:19:40,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:19:40,043 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:40,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:40,058 INFO L225 Difference]: With dead ends: 11837 [2021-06-05 21:19:40,058 INFO L226 Difference]: Without dead ends: 11837 [2021-06-05 21:19:40,058 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 218.0ms TimeCoverageRelationStatistics Valid=448, Invalid=884, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 21:19:40,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11837 states. [2021-06-05 21:19:40,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11837 to 11079. [2021-06-05 21:19:40,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11079 states, 11078 states have (on average 2.998826502978877) internal successors, (33221), 11078 states have internal predecessors, (33221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:40,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11079 states to 11079 states and 33221 transitions. [2021-06-05 21:19:40,221 INFO L78 Accepts]: Start accepts. Automaton has 11079 states and 33221 transitions. Word has length 22 [2021-06-05 21:19:40,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:40,221 INFO L482 AbstractCegarLoop]: Abstraction has 11079 states and 33221 transitions. [2021-06-05 21:19:40,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:40,221 INFO L276 IsEmpty]: Start isEmpty. Operand 11079 states and 33221 transitions. [2021-06-05 21:19:40,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:40,230 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:40,230 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:40,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2968 [2021-06-05 21:19:40,433 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:40,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:40,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1826781103, now seen corresponding path program 256 times [2021-06-05 21:19:40,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:40,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451320816] [2021-06-05 21:19:40,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:40,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:40,498 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:40,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:40,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451320816] [2021-06-05 21:19:40,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451320816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:40,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299175551] [2021-06-05 21:19:40,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:40,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:19:40,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:40,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:40,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:40,555 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:19:40,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299175551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:40,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:40,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:19:40,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426685025] [2021-06-05 21:19:40,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:19:40,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:40,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:19:40,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:19:40,556 INFO L87 Difference]: Start difference. First operand 11079 states and 33221 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:40,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:40,780 INFO L93 Difference]: Finished difference Result 11467 states and 33833 transitions. [2021-06-05 21:19:40,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:19:40,781 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:40,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:40,794 INFO L225 Difference]: With dead ends: 11467 [2021-06-05 21:19:40,794 INFO L226 Difference]: Without dead ends: 11459 [2021-06-05 21:19:40,794 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 155.6ms TimeCoverageRelationStatistics Valid=273, Invalid=539, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:19:40,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11459 states. [2021-06-05 21:19:40,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11459 to 11123. [2021-06-05 21:19:40,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11123 states, 11122 states have (on average 2.999550440568243) internal successors, (33361), 11122 states have internal predecessors, (33361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:40,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11123 states to 11123 states and 33361 transitions. [2021-06-05 21:19:40,947 INFO L78 Accepts]: Start accepts. Automaton has 11123 states and 33361 transitions. Word has length 22 [2021-06-05 21:19:40,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:40,947 INFO L482 AbstractCegarLoop]: Abstraction has 11123 states and 33361 transitions. [2021-06-05 21:19:40,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:40,947 INFO L276 IsEmpty]: Start isEmpty. Operand 11123 states and 33361 transitions. [2021-06-05 21:19:40,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:40,956 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:40,956 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:41,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2969,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:41,161 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:41,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:41,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1995549679, now seen corresponding path program 257 times [2021-06-05 21:19:41,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:41,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182704085] [2021-06-05 21:19:41,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:41,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:41,231 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:41,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:41,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182704085] [2021-06-05 21:19:41,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182704085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:41,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384067193] [2021-06-05 21:19:41,232 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:41,255 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:19:41,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:41,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:41,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:41,293 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:41,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384067193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:41,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:41,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:19:41,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218725513] [2021-06-05 21:19:41,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:19:41,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:41,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:19:41,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:19:41,294 INFO L87 Difference]: Start difference. First operand 11123 states and 33361 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:41,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:41,500 INFO L93 Difference]: Finished difference Result 14272 states and 42332 transitions. [2021-06-05 21:19:41,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:19:41,500 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:41,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:41,515 INFO L225 Difference]: With dead ends: 14272 [2021-06-05 21:19:41,516 INFO L226 Difference]: Without dead ends: 14272 [2021-06-05 21:19:41,516 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 165.0ms TimeCoverageRelationStatistics Valid=318, Invalid=612, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:19:41,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14272 states. [2021-06-05 21:19:41,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14272 to 8542. [2021-06-05 21:19:41,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8542 states, 8541 states have (on average 2.9779885259337315) internal successors, (25435), 8541 states have internal predecessors, (25435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:41,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8542 states to 8542 states and 25435 transitions. [2021-06-05 21:19:41,647 INFO L78 Accepts]: Start accepts. Automaton has 8542 states and 25435 transitions. Word has length 22 [2021-06-05 21:19:41,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:41,647 INFO L482 AbstractCegarLoop]: Abstraction has 8542 states and 25435 transitions. [2021-06-05 21:19:41,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:41,647 INFO L276 IsEmpty]: Start isEmpty. Operand 8542 states and 25435 transitions. [2021-06-05 21:19:41,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:41,653 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:41,653 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:41,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2970 [2021-06-05 21:19:41,854 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:41,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:41,854 INFO L82 PathProgramCache]: Analyzing trace with hash -155561425, now seen corresponding path program 258 times [2021-06-05 21:19:41,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:41,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783884454] [2021-06-05 21:19:41,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:41,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:41,911 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:19:41,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:41,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783884454] [2021-06-05 21:19:41,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783884454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:41,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833931935] [2021-06-05 21:19:41,912 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:41,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:19:41,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:41,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:41,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:41,993 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:19:41,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833931935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:41,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:41,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:19:41,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651007095] [2021-06-05 21:19:41,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:19:41,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:41,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:19:41,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:19:41,994 INFO L87 Difference]: Start difference. First operand 8542 states and 25435 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:42,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:42,137 INFO L93 Difference]: Finished difference Result 9541 states and 27821 transitions. [2021-06-05 21:19:42,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:19:42,137 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:42,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:42,149 INFO L225 Difference]: With dead ends: 9541 [2021-06-05 21:19:42,149 INFO L226 Difference]: Without dead ends: 9541 [2021-06-05 21:19:42,149 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 107.7ms TimeCoverageRelationStatistics Valid=182, Invalid=324, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:19:42,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9541 states. [2021-06-05 21:19:42,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9541 to 8634. [2021-06-05 21:19:42,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8634 states, 8633 states have (on average 2.976833082358392) internal successors, (25699), 8633 states have internal predecessors, (25699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:42,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8634 states to 8634 states and 25699 transitions. [2021-06-05 21:19:42,275 INFO L78 Accepts]: Start accepts. Automaton has 8634 states and 25699 transitions. Word has length 22 [2021-06-05 21:19:42,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:42,275 INFO L482 AbstractCegarLoop]: Abstraction has 8634 states and 25699 transitions. [2021-06-05 21:19:42,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:42,275 INFO L276 IsEmpty]: Start isEmpty. Operand 8634 states and 25699 transitions. [2021-06-05 21:19:42,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:42,283 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:42,283 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:42,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2971,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:42,483 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:42,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:42,483 INFO L82 PathProgramCache]: Analyzing trace with hash 382294153, now seen corresponding path program 259 times [2021-06-05 21:19:42,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:42,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634688234] [2021-06-05 21:19:42,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:42,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:42,545 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:42,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:42,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634688234] [2021-06-05 21:19:42,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634688234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:42,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344468590] [2021-06-05 21:19:42,545 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:42,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:42,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:42,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:42,646 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:42,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344468590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:42,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:42,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:19:42,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075074618] [2021-06-05 21:19:42,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:19:42,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:42,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:19:42,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:19:42,647 INFO L87 Difference]: Start difference. First operand 8634 states and 25699 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:42,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:42,767 INFO L93 Difference]: Finished difference Result 9330 states and 27244 transitions. [2021-06-05 21:19:42,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:19:42,768 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:42,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:42,778 INFO L225 Difference]: With dead ends: 9330 [2021-06-05 21:19:42,778 INFO L226 Difference]: Without dead ends: 9330 [2021-06-05 21:19:42,778 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 103.4ms TimeCoverageRelationStatistics Valid=175, Invalid=331, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:19:42,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9330 states. [2021-06-05 21:19:42,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9330 to 6762. [2021-06-05 21:19:42,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6762 states, 6761 states have (on average 2.9630232214169503) internal successors, (20033), 6761 states have internal predecessors, (20033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:42,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6762 states to 6762 states and 20033 transitions. [2021-06-05 21:19:42,876 INFO L78 Accepts]: Start accepts. Automaton has 6762 states and 20033 transitions. Word has length 22 [2021-06-05 21:19:42,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:42,877 INFO L482 AbstractCegarLoop]: Abstraction has 6762 states and 20033 transitions. [2021-06-05 21:19:42,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:42,877 INFO L276 IsEmpty]: Start isEmpty. Operand 6762 states and 20033 transitions. [2021-06-05 21:19:42,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:42,882 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:42,882 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:43,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2972 [2021-06-05 21:19:43,082 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:43,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:43,082 INFO L82 PathProgramCache]: Analyzing trace with hash -124052113, now seen corresponding path program 260 times [2021-06-05 21:19:43,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:43,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289266744] [2021-06-05 21:19:43,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:43,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:43,148 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:19:43,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:43,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289266744] [2021-06-05 21:19:43,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289266744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:43,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96702562] [2021-06-05 21:19:43,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:43,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:19:43,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:43,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:43,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:43,208 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:19:43,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96702562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:43,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:43,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:19:43,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198869125] [2021-06-05 21:19:43,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:19:43,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:43,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:19:43,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:19:43,209 INFO L87 Difference]: Start difference. First operand 6762 states and 20033 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:43,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:43,312 INFO L93 Difference]: Finished difference Result 8299 states and 24037 transitions. [2021-06-05 21:19:43,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:19:43,312 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:43,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:43,322 INFO L225 Difference]: With dead ends: 8299 [2021-06-05 21:19:43,322 INFO L226 Difference]: Without dead ends: 8299 [2021-06-05 21:19:43,322 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 94.4ms TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:19:43,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8299 states. [2021-06-05 21:19:43,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8299 to 7676. [2021-06-05 21:19:43,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7676 states, 7675 states have (on average 2.9603908794788274) internal successors, (22721), 7675 states have internal predecessors, (22721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:43,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7676 states to 7676 states and 22721 transitions. [2021-06-05 21:19:43,425 INFO L78 Accepts]: Start accepts. Automaton has 7676 states and 22721 transitions. Word has length 22 [2021-06-05 21:19:43,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:43,425 INFO L482 AbstractCegarLoop]: Abstraction has 7676 states and 22721 transitions. [2021-06-05 21:19:43,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:43,426 INFO L276 IsEmpty]: Start isEmpty. Operand 7676 states and 22721 transitions. [2021-06-05 21:19:43,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:43,432 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:43,432 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:43,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2973,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:43,633 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:43,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:43,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1359082825, now seen corresponding path program 261 times [2021-06-05 21:19:43,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:43,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026478792] [2021-06-05 21:19:43,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:43,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:43,705 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:43,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:43,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026478792] [2021-06-05 21:19:43,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026478792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:43,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556352928] [2021-06-05 21:19:43,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:43,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:19:43,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:43,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:43,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:43,767 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:43,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556352928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:43,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:43,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:19:43,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354659845] [2021-06-05 21:19:43,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:19:43,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:43,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:19:43,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:19:43,769 INFO L87 Difference]: Start difference. First operand 7676 states and 22721 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:43,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:43,937 INFO L93 Difference]: Finished difference Result 8482 states and 24462 transitions. [2021-06-05 21:19:43,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:19:43,937 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:43,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:43,947 INFO L225 Difference]: With dead ends: 8482 [2021-06-05 21:19:43,948 INFO L226 Difference]: Without dead ends: 8482 [2021-06-05 21:19:43,948 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 145.2ms TimeCoverageRelationStatistics Valid=249, Invalid=507, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:19:43,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8482 states. [2021-06-05 21:19:44,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8482 to 7047. [2021-06-05 21:19:44,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7047 states, 7046 states have (on average 2.9541583877377233) internal successors, (20815), 7046 states have internal predecessors, (20815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:44,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7047 states to 7047 states and 20815 transitions. [2021-06-05 21:19:44,056 INFO L78 Accepts]: Start accepts. Automaton has 7047 states and 20815 transitions. Word has length 22 [2021-06-05 21:19:44,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:44,056 INFO L482 AbstractCegarLoop]: Abstraction has 7047 states and 20815 transitions. [2021-06-05 21:19:44,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:44,057 INFO L276 IsEmpty]: Start isEmpty. Operand 7047 states and 20815 transitions. [2021-06-05 21:19:44,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:44,063 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:44,063 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:44,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2974 [2021-06-05 21:19:44,263 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:44,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:44,263 INFO L82 PathProgramCache]: Analyzing trace with hash 91625647, now seen corresponding path program 262 times [2021-06-05 21:19:44,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:44,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704754495] [2021-06-05 21:19:44,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:44,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:44,340 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:44,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:44,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704754495] [2021-06-05 21:19:44,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704754495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:44,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789655815] [2021-06-05 21:19:44,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:44,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:19:44,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:44,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:44,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:44,401 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:44,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789655815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:44,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:44,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:19:44,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82941845] [2021-06-05 21:19:44,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:19:44,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:44,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:19:44,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:19:44,402 INFO L87 Difference]: Start difference. First operand 7047 states and 20815 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:44,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:44,669 INFO L93 Difference]: Finished difference Result 8517 states and 24388 transitions. [2021-06-05 21:19:44,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:19:44,670 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:44,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:44,680 INFO L225 Difference]: With dead ends: 8517 [2021-06-05 21:19:44,680 INFO L226 Difference]: Without dead ends: 8517 [2021-06-05 21:19:44,680 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 225.1ms TimeCoverageRelationStatistics Valid=447, Invalid=885, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 21:19:44,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8517 states. [2021-06-05 21:19:44,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8517 to 6822. [2021-06-05 21:19:44,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6822 states, 6821 states have (on average 2.9705321800322535) internal successors, (20262), 6821 states have internal predecessors, (20262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:44,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6822 states to 6822 states and 20262 transitions. [2021-06-05 21:19:44,780 INFO L78 Accepts]: Start accepts. Automaton has 6822 states and 20262 transitions. Word has length 22 [2021-06-05 21:19:44,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:44,780 INFO L482 AbstractCegarLoop]: Abstraction has 6822 states and 20262 transitions. [2021-06-05 21:19:44,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:44,780 INFO L276 IsEmpty]: Start isEmpty. Operand 6822 states and 20262 transitions. [2021-06-05 21:19:44,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:44,785 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:44,785 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:44,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2975 [2021-06-05 21:19:44,986 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:44,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:44,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1108198033, now seen corresponding path program 263 times [2021-06-05 21:19:44,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:44,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041273478] [2021-06-05 21:19:44,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:44,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:45,039 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:45,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:45,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041273478] [2021-06-05 21:19:45,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041273478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:45,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733352255] [2021-06-05 21:19:45,040 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:45,064 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:19:45,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:45,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:45,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:45,096 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:19:45,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733352255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:45,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:45,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:19:45,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012196630] [2021-06-05 21:19:45,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:19:45,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:45,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:19:45,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:19:45,097 INFO L87 Difference]: Start difference. First operand 6822 states and 20262 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:45,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:45,266 INFO L93 Difference]: Finished difference Result 7102 states and 20626 transitions. [2021-06-05 21:19:45,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:19:45,267 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:45,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:45,273 INFO L225 Difference]: With dead ends: 7102 [2021-06-05 21:19:45,273 INFO L226 Difference]: Without dead ends: 7096 [2021-06-05 21:19:45,273 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 121.6ms TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:19:45,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7096 states. [2021-06-05 21:19:45,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7096 to 6624. [2021-06-05 21:19:45,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6624 states, 6623 states have (on average 2.958930998037143) internal successors, (19597), 6623 states have internal predecessors, (19597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:45,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6624 states to 6624 states and 19597 transitions. [2021-06-05 21:19:45,360 INFO L78 Accepts]: Start accepts. Automaton has 6624 states and 19597 transitions. Word has length 22 [2021-06-05 21:19:45,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:45,360 INFO L482 AbstractCegarLoop]: Abstraction has 6624 states and 19597 transitions. [2021-06-05 21:19:45,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:45,360 INFO L276 IsEmpty]: Start isEmpty. Operand 6624 states and 19597 transitions. [2021-06-05 21:19:45,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:45,365 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:45,365 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:45,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2976,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:45,566 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:45,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:45,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1172512213, now seen corresponding path program 264 times [2021-06-05 21:19:45,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:45,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460865304] [2021-06-05 21:19:45,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:45,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:45,630 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:19:45,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:45,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460865304] [2021-06-05 21:19:45,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460865304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:45,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784159283] [2021-06-05 21:19:45,630 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:45,653 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:19:45,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:45,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:45,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:45,697 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:19:45,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784159283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:45,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:45,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:19:45,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196573752] [2021-06-05 21:19:45,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:19:45,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:45,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:19:45,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:19:45,698 INFO L87 Difference]: Start difference. First operand 6624 states and 19597 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:45,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:45,795 INFO L93 Difference]: Finished difference Result 6797 states and 19752 transitions. [2021-06-05 21:19:45,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:19:45,796 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:45,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:45,804 INFO L225 Difference]: With dead ends: 6797 [2021-06-05 21:19:45,804 INFO L226 Difference]: Without dead ends: 6795 [2021-06-05 21:19:45,804 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 94.9ms TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:19:45,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6795 states. [2021-06-05 21:19:45,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6795 to 6384. [2021-06-05 21:19:45,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6384 states, 6383 states have (on average 2.953313488955037) internal successors, (18851), 6383 states have internal predecessors, (18851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:45,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6384 states to 6384 states and 18851 transitions. [2021-06-05 21:19:45,890 INFO L78 Accepts]: Start accepts. Automaton has 6384 states and 18851 transitions. Word has length 22 [2021-06-05 21:19:45,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:45,890 INFO L482 AbstractCegarLoop]: Abstraction has 6384 states and 18851 transitions. [2021-06-05 21:19:45,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:45,890 INFO L276 IsEmpty]: Start isEmpty. Operand 6384 states and 18851 transitions. [2021-06-05 21:19:45,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:45,896 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:45,896 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:46,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2977 [2021-06-05 21:19:46,096 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:46,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:46,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1639320145, now seen corresponding path program 265 times [2021-06-05 21:19:46,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:46,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355029634] [2021-06-05 21:19:46,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:46,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:46,169 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:46,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:46,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355029634] [2021-06-05 21:19:46,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355029634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:46,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072462504] [2021-06-05 21:19:46,169 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:46,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:46,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:46,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:46,235 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:46,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072462504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:46,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:46,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:19:46,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597609194] [2021-06-05 21:19:46,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:19:46,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:46,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:19:46,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:19:46,236 INFO L87 Difference]: Start difference. First operand 6384 states and 18851 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:46,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:46,393 INFO L93 Difference]: Finished difference Result 6844 states and 19836 transitions. [2021-06-05 21:19:46,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:19:46,394 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:46,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:46,401 INFO L225 Difference]: With dead ends: 6844 [2021-06-05 21:19:46,401 INFO L226 Difference]: Without dead ends: 6844 [2021-06-05 21:19:46,401 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 144.6ms TimeCoverageRelationStatistics Valid=252, Invalid=504, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:19:46,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6844 states. [2021-06-05 21:19:46,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6844 to 5821. [2021-06-05 21:19:46,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5821 states, 5820 states have (on average 2.943986254295533) internal successors, (17134), 5820 states have internal predecessors, (17134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:46,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5821 states to 5821 states and 17134 transitions. [2021-06-05 21:19:46,479 INFO L78 Accepts]: Start accepts. Automaton has 5821 states and 17134 transitions. Word has length 22 [2021-06-05 21:19:46,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:46,479 INFO L482 AbstractCegarLoop]: Abstraction has 5821 states and 17134 transitions. [2021-06-05 21:19:46,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:46,479 INFO L276 IsEmpty]: Start isEmpty. Operand 5821 states and 17134 transitions. [2021-06-05 21:19:46,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:46,484 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:46,484 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:46,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2978,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:46,684 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:46,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:46,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1388189973, now seen corresponding path program 266 times [2021-06-05 21:19:46,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:46,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566899086] [2021-06-05 21:19:46,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:46,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:46,760 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:46,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:46,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566899086] [2021-06-05 21:19:46,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566899086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:46,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184407793] [2021-06-05 21:19:46,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:46,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:19:46,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:46,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:46,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:46,859 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:46,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184407793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:46,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:46,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:19:46,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383574511] [2021-06-05 21:19:46,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:19:46,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:46,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:19:46,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:19:46,860 INFO L87 Difference]: Start difference. First operand 5821 states and 17134 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:47,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:47,123 INFO L93 Difference]: Finished difference Result 6844 states and 19503 transitions. [2021-06-05 21:19:47,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:19:47,123 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:47,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:47,131 INFO L225 Difference]: With dead ends: 6844 [2021-06-05 21:19:47,132 INFO L226 Difference]: Without dead ends: 6844 [2021-06-05 21:19:47,132 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 228.0ms TimeCoverageRelationStatistics Valid=478, Invalid=928, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 21:19:47,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6844 states. [2021-06-05 21:19:47,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6844 to 5659. [2021-06-05 21:19:47,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5659 states, 5658 states have (on average 2.957582184517497) internal successors, (16734), 5658 states have internal predecessors, (16734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:47,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5659 states to 5659 states and 16734 transitions. [2021-06-05 21:19:47,208 INFO L78 Accepts]: Start accepts. Automaton has 5659 states and 16734 transitions. Word has length 22 [2021-06-05 21:19:47,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:47,208 INFO L482 AbstractCegarLoop]: Abstraction has 5659 states and 16734 transitions. [2021-06-05 21:19:47,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:47,208 INFO L276 IsEmpty]: Start isEmpty. Operand 5659 states and 16734 transitions. [2021-06-05 21:19:47,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:47,213 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:47,213 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:47,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2979 [2021-06-05 21:19:47,413 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:47,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:47,413 INFO L82 PathProgramCache]: Analyzing trace with hash -2101570705, now seen corresponding path program 267 times [2021-06-05 21:19:47,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:47,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027169794] [2021-06-05 21:19:47,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:47,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:47,459 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:47,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:47,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027169794] [2021-06-05 21:19:47,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027169794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:47,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357386126] [2021-06-05 21:19:47,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:47,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:19:47,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:47,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:47,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:47,517 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:19:47,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357386126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:47,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:47,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:19:47,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704148160] [2021-06-05 21:19:47,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:19:47,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:47,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:19:47,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:19:47,517 INFO L87 Difference]: Start difference. First operand 5659 states and 16734 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:47,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:47,656 INFO L93 Difference]: Finished difference Result 5851 states and 16961 transitions. [2021-06-05 21:19:47,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:19:47,657 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:47,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:47,663 INFO L225 Difference]: With dead ends: 5851 [2021-06-05 21:19:47,663 INFO L226 Difference]: Without dead ends: 5847 [2021-06-05 21:19:47,663 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 97.9ms TimeCoverageRelationStatistics Valid=176, Invalid=330, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:19:47,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5847 states. [2021-06-05 21:19:47,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5847 to 5652. [2021-06-05 21:19:47,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5652 states, 5651 states have (on average 2.956290921960715) internal successors, (16706), 5651 states have internal predecessors, (16706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:47,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5652 states to 5652 states and 16706 transitions. [2021-06-05 21:19:47,736 INFO L78 Accepts]: Start accepts. Automaton has 5652 states and 16706 transitions. Word has length 22 [2021-06-05 21:19:47,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:47,736 INFO L482 AbstractCegarLoop]: Abstraction has 5652 states and 16706 transitions. [2021-06-05 21:19:47,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:47,736 INFO L276 IsEmpty]: Start isEmpty. Operand 5652 states and 16706 transitions. [2021-06-05 21:19:47,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:47,740 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:47,740 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:47,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2980 [2021-06-05 21:19:47,941 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:47,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:47,941 INFO L82 PathProgramCache]: Analyzing trace with hash -371100689, now seen corresponding path program 268 times [2021-06-05 21:19:47,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:47,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76446759] [2021-06-05 21:19:47,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:47,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:48,019 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:48,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:48,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76446759] [2021-06-05 21:19:48,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76446759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:48,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450418641] [2021-06-05 21:19:48,019 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:48,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:19:48,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:48,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:48,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:48,087 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:48,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450418641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:48,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:48,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:19:48,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739747281] [2021-06-05 21:19:48,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:19:48,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:48,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:19:48,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:19:48,088 INFO L87 Difference]: Start difference. First operand 5652 states and 16706 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:48,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:48,331 INFO L93 Difference]: Finished difference Result 7203 states and 20623 transitions. [2021-06-05 21:19:48,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:19:48,331 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:48,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:48,339 INFO L225 Difference]: With dead ends: 7203 [2021-06-05 21:19:48,339 INFO L226 Difference]: Without dead ends: 7203 [2021-06-05 21:19:48,339 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 206.5ms TimeCoverageRelationStatistics Valid=403, Invalid=787, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:19:48,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7203 states. [2021-06-05 21:19:48,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7203 to 6624. [2021-06-05 21:19:48,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6624 states, 6623 states have (on average 2.953042427902763) internal successors, (19558), 6623 states have internal predecessors, (19558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:48,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6624 states to 6624 states and 19558 transitions. [2021-06-05 21:19:48,427 INFO L78 Accepts]: Start accepts. Automaton has 6624 states and 19558 transitions. Word has length 22 [2021-06-05 21:19:48,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:48,427 INFO L482 AbstractCegarLoop]: Abstraction has 6624 states and 19558 transitions. [2021-06-05 21:19:48,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:48,427 INFO L276 IsEmpty]: Start isEmpty. Operand 6624 states and 19558 transitions. [2021-06-05 21:19:48,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:48,432 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:48,433 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:48,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2981,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:48,633 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:48,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:48,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1096732975, now seen corresponding path program 269 times [2021-06-05 21:19:48,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:48,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764749543] [2021-06-05 21:19:48,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:48,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:48,682 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:48,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:48,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764749543] [2021-06-05 21:19:48,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764749543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:48,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232165920] [2021-06-05 21:19:48,683 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:48,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:19:48,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:48,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:48,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:48,739 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:19:48,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232165920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:48,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:48,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:19:48,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092247956] [2021-06-05 21:19:48,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:19:48,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:48,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:19:48,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:19:48,740 INFO L87 Difference]: Start difference. First operand 6624 states and 19558 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:48,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:48,891 INFO L93 Difference]: Finished difference Result 6862 states and 19866 transitions. [2021-06-05 21:19:48,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:19:48,891 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:48,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:48,899 INFO L225 Difference]: With dead ends: 6862 [2021-06-05 21:19:48,899 INFO L226 Difference]: Without dead ends: 6858 [2021-06-05 21:19:48,899 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 91.5ms TimeCoverageRelationStatistics Valid=169, Invalid=293, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:19:48,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6858 states. [2021-06-05 21:19:48,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6858 to 6638. [2021-06-05 21:19:48,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6638 states, 6637 states have (on average 2.9532921500678015) internal successors, (19601), 6637 states have internal predecessors, (19601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:48,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6638 states to 6638 states and 19601 transitions. [2021-06-05 21:19:48,990 INFO L78 Accepts]: Start accepts. Automaton has 6638 states and 19601 transitions. Word has length 22 [2021-06-05 21:19:48,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:48,990 INFO L482 AbstractCegarLoop]: Abstraction has 6638 states and 19601 transitions. [2021-06-05 21:19:48,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:48,990 INFO L276 IsEmpty]: Start isEmpty. Operand 6638 states and 19601 transitions. [2021-06-05 21:19:48,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:48,995 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:48,995 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:49,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2982 [2021-06-05 21:19:49,196 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:49,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:49,196 INFO L82 PathProgramCache]: Analyzing trace with hash 621016085, now seen corresponding path program 270 times [2021-06-05 21:19:49,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:49,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804206254] [2021-06-05 21:19:49,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:49,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:49,251 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:49,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:49,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804206254] [2021-06-05 21:19:49,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804206254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:49,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144908345] [2021-06-05 21:19:49,251 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:49,275 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:19:49,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:49,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:49,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:49,313 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:49,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144908345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:49,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:49,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:19:49,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912092394] [2021-06-05 21:19:49,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:19:49,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:49,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:19:49,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:19:49,314 INFO L87 Difference]: Start difference. First operand 6638 states and 19601 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:49,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:49,411 INFO L93 Difference]: Finished difference Result 7175 states and 20692 transitions. [2021-06-05 21:19:49,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:19:49,411 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:49,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:49,417 INFO L225 Difference]: With dead ends: 7175 [2021-06-05 21:19:49,418 INFO L226 Difference]: Without dead ends: 7175 [2021-06-05 21:19:49,418 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 75.7ms TimeCoverageRelationStatistics Valid=133, Invalid=209, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:19:49,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7175 states. [2021-06-05 21:19:49,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7175 to 6639. [2021-06-05 21:19:49,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6639 states, 6638 states have (on average 2.9528472431455257) internal successors, (19601), 6638 states have internal predecessors, (19601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:49,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6639 states to 6639 states and 19601 transitions. [2021-06-05 21:19:49,497 INFO L78 Accepts]: Start accepts. Automaton has 6639 states and 19601 transitions. Word has length 22 [2021-06-05 21:19:49,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:49,497 INFO L482 AbstractCegarLoop]: Abstraction has 6639 states and 19601 transitions. [2021-06-05 21:19:49,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:49,498 INFO L276 IsEmpty]: Start isEmpty. Operand 6639 states and 19601 transitions. [2021-06-05 21:19:49,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:49,502 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:49,503 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:49,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2983,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:49,703 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:49,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:49,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1108031249, now seen corresponding path program 271 times [2021-06-05 21:19:49,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:49,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364086711] [2021-06-05 21:19:49,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:49,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:49,755 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:19:49,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:49,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364086711] [2021-06-05 21:19:49,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364086711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:49,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228294926] [2021-06-05 21:19:49,756 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:49,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:49,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:49,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:49,848 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:19:49,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228294926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:49,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:49,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 21:19:49,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921961829] [2021-06-05 21:19:49,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:19:49,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:49,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:19:49,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:19:49,849 INFO L87 Difference]: Start difference. First operand 6639 states and 19601 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:50,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:50,006 INFO L93 Difference]: Finished difference Result 7416 states and 21327 transitions. [2021-06-05 21:19:50,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:19:50,006 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:50,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:50,015 INFO L225 Difference]: With dead ends: 7416 [2021-06-05 21:19:50,015 INFO L226 Difference]: Without dead ends: 7416 [2021-06-05 21:19:50,015 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 124.0ms TimeCoverageRelationStatistics Valid=203, Invalid=349, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:19:50,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7416 states. [2021-06-05 21:19:50,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7416 to 6639. [2021-06-05 21:19:50,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6639 states, 6638 states have (on average 2.9526965953600484) internal successors, (19600), 6638 states have internal predecessors, (19600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:50,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6639 states to 6639 states and 19600 transitions. [2021-06-05 21:19:50,104 INFO L78 Accepts]: Start accepts. Automaton has 6639 states and 19600 transitions. Word has length 22 [2021-06-05 21:19:50,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:50,104 INFO L482 AbstractCegarLoop]: Abstraction has 6639 states and 19600 transitions. [2021-06-05 21:19:50,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:50,104 INFO L276 IsEmpty]: Start isEmpty. Operand 6639 states and 19600 transitions. [2021-06-05 21:19:50,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:50,110 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:50,110 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:50,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2984 [2021-06-05 21:19:50,317 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:50,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:50,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1126076245, now seen corresponding path program 272 times [2021-06-05 21:19:50,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:50,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818505683] [2021-06-05 21:19:50,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:50,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:50,374 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:50,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:50,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818505683] [2021-06-05 21:19:50,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818505683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:50,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860509083] [2021-06-05 21:19:50,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:50,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:19:50,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:50,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:50,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:50,442 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:50,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860509083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:50,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:50,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:19:50,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615933496] [2021-06-05 21:19:50,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:19:50,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:50,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:19:50,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:19:50,443 INFO L87 Difference]: Start difference. First operand 6639 states and 19600 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:50,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:50,603 INFO L93 Difference]: Finished difference Result 7505 states and 21578 transitions. [2021-06-05 21:19:50,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:19:50,603 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:50,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:50,612 INFO L225 Difference]: With dead ends: 7505 [2021-06-05 21:19:50,612 INFO L226 Difference]: Without dead ends: 7505 [2021-06-05 21:19:50,612 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 132.0ms TimeCoverageRelationStatistics Valid=253, Invalid=449, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:19:50,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7505 states. [2021-06-05 21:19:50,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7505 to 6648. [2021-06-05 21:19:50,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6648 states, 6647 states have (on average 2.9527606438995035) internal successors, (19627), 6647 states have internal predecessors, (19627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:50,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6648 states to 6648 states and 19627 transitions. [2021-06-05 21:19:50,699 INFO L78 Accepts]: Start accepts. Automaton has 6648 states and 19627 transitions. Word has length 22 [2021-06-05 21:19:50,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:50,699 INFO L482 AbstractCegarLoop]: Abstraction has 6648 states and 19627 transitions. [2021-06-05 21:19:50,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:50,699 INFO L276 IsEmpty]: Start isEmpty. Operand 6648 states and 19627 transitions. [2021-06-05 21:19:50,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:50,705 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:50,705 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:50,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2985,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:50,906 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:50,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:50,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1663931823, now seen corresponding path program 273 times [2021-06-05 21:19:50,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:50,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706362747] [2021-06-05 21:19:50,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:50,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:50,965 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:19:50,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:50,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706362747] [2021-06-05 21:19:50,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706362747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:50,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128155807] [2021-06-05 21:19:50,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:50,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:19:50,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:50,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:50,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:51,034 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:19:51,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128155807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:51,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:51,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 21:19:51,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201232176] [2021-06-05 21:19:51,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:19:51,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:51,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:19:51,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:19:51,034 INFO L87 Difference]: Start difference. First operand 6648 states and 19627 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:51,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:51,213 INFO L93 Difference]: Finished difference Result 8295 states and 23872 transitions. [2021-06-05 21:19:51,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:19:51,213 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:51,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:51,223 INFO L225 Difference]: With dead ends: 8295 [2021-06-05 21:19:51,223 INFO L226 Difference]: Without dead ends: 8295 [2021-06-05 21:19:51,223 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 156.5ms TimeCoverageRelationStatistics Valid=246, Invalid=456, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:19:51,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8295 states. [2021-06-05 21:19:51,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8295 to 7544. [2021-06-05 21:19:51,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7544 states, 7543 states have (on average 2.966193822086703) internal successors, (22374), 7543 states have internal predecessors, (22374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:51,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7544 states to 7544 states and 22374 transitions. [2021-06-05 21:19:51,325 INFO L78 Accepts]: Start accepts. Automaton has 7544 states and 22374 transitions. Word has length 22 [2021-06-05 21:19:51,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:51,325 INFO L482 AbstractCegarLoop]: Abstraction has 7544 states and 22374 transitions. [2021-06-05 21:19:51,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:51,325 INFO L276 IsEmpty]: Start isEmpty. Operand 7544 states and 22374 transitions. [2021-06-05 21:19:51,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:51,331 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:51,331 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:51,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2986,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:51,532 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:51,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:51,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1157585557, now seen corresponding path program 274 times [2021-06-05 21:19:51,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:51,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326409728] [2021-06-05 21:19:51,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:51,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:51,600 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:51,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:51,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326409728] [2021-06-05 21:19:51,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326409728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:51,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97299862] [2021-06-05 21:19:51,600 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:51,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:19:51,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:51,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:51,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:51,667 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:51,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97299862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:51,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:51,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:19:51,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552050371] [2021-06-05 21:19:51,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:19:51,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:51,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:19:51,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:19:51,668 INFO L87 Difference]: Start difference. First operand 7544 states and 22374 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:51,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:51,814 INFO L93 Difference]: Finished difference Result 8145 states and 23520 transitions. [2021-06-05 21:19:51,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:19:51,814 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:51,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:51,824 INFO L225 Difference]: With dead ends: 8145 [2021-06-05 21:19:51,824 INFO L226 Difference]: Without dead ends: 8145 [2021-06-05 21:19:51,824 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 132.4ms TimeCoverageRelationStatistics Valid=219, Invalid=431, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:19:51,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8145 states. [2021-06-05 21:19:51,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8145 to 7488. [2021-06-05 21:19:51,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7488 states, 7487 states have (on average 2.9648724455723254) internal successors, (22198), 7487 states have internal predecessors, (22198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:51,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7488 states to 7488 states and 22198 transitions. [2021-06-05 21:19:51,927 INFO L78 Accepts]: Start accepts. Automaton has 7488 states and 22198 transitions. Word has length 22 [2021-06-05 21:19:51,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:51,927 INFO L482 AbstractCegarLoop]: Abstraction has 7488 states and 22198 transitions. [2021-06-05 21:19:51,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:51,928 INFO L276 IsEmpty]: Start isEmpty. Operand 7488 states and 22198 transitions. [2021-06-05 21:19:51,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:51,933 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:51,934 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:52,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2987 [2021-06-05 21:19:52,134 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:52,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:52,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1654246801, now seen corresponding path program 275 times [2021-06-05 21:19:52,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:52,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585576526] [2021-06-05 21:19:52,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:52,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:52,217 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:19:52,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:52,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585576526] [2021-06-05 21:19:52,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585576526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:52,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566050413] [2021-06-05 21:19:52,217 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:52,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:19:52,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:52,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:52,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:52,294 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:19:52,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566050413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:52,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:52,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:19:52,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358756965] [2021-06-05 21:19:52,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:19:52,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:52,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:19:52,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:19:52,294 INFO L87 Difference]: Start difference. First operand 7488 states and 22198 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:52,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:52,428 INFO L93 Difference]: Finished difference Result 9477 states and 27589 transitions. [2021-06-05 21:19:52,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:19:52,429 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:52,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:52,437 INFO L225 Difference]: With dead ends: 9477 [2021-06-05 21:19:52,438 INFO L226 Difference]: Without dead ends: 9477 [2021-06-05 21:19:52,438 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 131.7ms TimeCoverageRelationStatistics Valid=169, Invalid=383, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:19:52,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9477 states. [2021-06-05 21:19:52,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9477 to 8935. [2021-06-05 21:19:52,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8935 states, 8934 states have (on average 2.9705618983657938) internal successors, (26539), 8934 states have internal predecessors, (26539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:52,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8935 states to 8935 states and 26539 transitions. [2021-06-05 21:19:52,542 INFO L78 Accepts]: Start accepts. Automaton has 8935 states and 26539 transitions. Word has length 22 [2021-06-05 21:19:52,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:52,542 INFO L482 AbstractCegarLoop]: Abstraction has 8935 states and 26539 transitions. [2021-06-05 21:19:52,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:52,542 INFO L276 IsEmpty]: Start isEmpty. Operand 8935 states and 26539 transitions. [2021-06-05 21:19:52,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:52,550 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:52,550 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:52,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2988,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:52,750 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:52,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:52,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1373263317, now seen corresponding path program 276 times [2021-06-05 21:19:52,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:52,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651898770] [2021-06-05 21:19:52,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:52,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:52,827 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:52,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:52,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651898770] [2021-06-05 21:19:52,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651898770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:52,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106614389] [2021-06-05 21:19:52,827 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:52,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:19:52,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:52,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:52,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:52,894 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:52,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106614389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:52,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:52,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:19:52,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093582785] [2021-06-05 21:19:52,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:19:52,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:52,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:19:52,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:19:52,895 INFO L87 Difference]: Start difference. First operand 8935 states and 26539 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:53,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:53,104 INFO L93 Difference]: Finished difference Result 9543 states and 27760 transitions. [2021-06-05 21:19:53,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:19:53,104 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:53,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:53,113 INFO L225 Difference]: With dead ends: 9543 [2021-06-05 21:19:53,113 INFO L226 Difference]: Without dead ends: 9543 [2021-06-05 21:19:53,113 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 180.7ms TimeCoverageRelationStatistics Valid=322, Invalid=670, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:19:53,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9543 states. [2021-06-05 21:19:53,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9543 to 8928. [2021-06-05 21:19:53,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8928 states, 8927 states have (on average 2.9704267951159404) internal successors, (26517), 8927 states have internal predecessors, (26517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:53,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8928 states to 8928 states and 26517 transitions. [2021-06-05 21:19:53,210 INFO L78 Accepts]: Start accepts. Automaton has 8928 states and 26517 transitions. Word has length 22 [2021-06-05 21:19:53,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:53,210 INFO L482 AbstractCegarLoop]: Abstraction has 8928 states and 26517 transitions. [2021-06-05 21:19:53,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:53,210 INFO L276 IsEmpty]: Start isEmpty. Operand 8928 states and 26517 transitions. [2021-06-05 21:19:53,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:53,217 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:53,217 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:53,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2989 [2021-06-05 21:19:53,418 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:53,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:53,418 INFO L82 PathProgramCache]: Analyzing trace with hash 736796463, now seen corresponding path program 277 times [2021-06-05 21:19:53,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:53,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664715576] [2021-06-05 21:19:53,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:53,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:53,498 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:53,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:53,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664715576] [2021-06-05 21:19:53,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664715576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:53,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325251125] [2021-06-05 21:19:53,499 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:53,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:53,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:53,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:53,565 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:53,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325251125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:53,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:53,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:19:53,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333882411] [2021-06-05 21:19:53,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:19:53,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:53,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:19:53,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:19:53,566 INFO L87 Difference]: Start difference. First operand 8928 states and 26517 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:53,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:53,875 INFO L93 Difference]: Finished difference Result 10324 states and 30070 transitions. [2021-06-05 21:19:53,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 21:19:53,875 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:53,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:53,887 INFO L225 Difference]: With dead ends: 10324 [2021-06-05 21:19:53,887 INFO L226 Difference]: Without dead ends: 10324 [2021-06-05 21:19:53,888 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 264.5ms TimeCoverageRelationStatistics Valid=551, Invalid=1089, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 21:19:53,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10324 states. [2021-06-05 21:19:53,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10324 to 9639. [2021-06-05 21:19:53,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9639 states, 9638 states have (on average 2.9726084249844367) internal successors, (28650), 9638 states have internal predecessors, (28650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:54,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9639 states to 9639 states and 28650 transitions. [2021-06-05 21:19:54,003 INFO L78 Accepts]: Start accepts. Automaton has 9639 states and 28650 transitions. Word has length 22 [2021-06-05 21:19:54,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:54,004 INFO L482 AbstractCegarLoop]: Abstraction has 9639 states and 28650 transitions. [2021-06-05 21:19:54,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:54,004 INFO L276 IsEmpty]: Start isEmpty. Operand 9639 states and 28650 transitions. [2021-06-05 21:19:54,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:54,011 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:54,011 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:54,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2990,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:54,211 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:54,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:54,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1039148775, now seen corresponding path program 278 times [2021-06-05 21:19:54,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:54,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042700687] [2021-06-05 21:19:54,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:54,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:54,301 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:54,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:54,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042700687] [2021-06-05 21:19:54,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042700687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:54,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987679498] [2021-06-05 21:19:54,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:54,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:19:54,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:54,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:54,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:54,388 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:54,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987679498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:54,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:54,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-06-05 21:19:54,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717573786] [2021-06-05 21:19:54,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:19:54,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:54,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:19:54,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:19:54,389 INFO L87 Difference]: Start difference. First operand 9639 states and 28650 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:54,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:54,708 INFO L93 Difference]: Finished difference Result 9988 states and 29135 transitions. [2021-06-05 21:19:54,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:19:54,709 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:54,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:54,725 INFO L225 Difference]: With dead ends: 9988 [2021-06-05 21:19:54,725 INFO L226 Difference]: Without dead ends: 9980 [2021-06-05 21:19:54,725 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 242.3ms TimeCoverageRelationStatistics Valid=354, Invalid=702, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:19:54,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9980 states. [2021-06-05 21:19:54,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9980 to 9589. [2021-06-05 21:19:54,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9589 states, 9588 states have (on average 2.9695452649144762) internal successors, (28472), 9588 states have internal predecessors, (28472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:54,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9589 states to 9589 states and 28472 transitions. [2021-06-05 21:19:54,900 INFO L78 Accepts]: Start accepts. Automaton has 9589 states and 28472 transitions. Word has length 22 [2021-06-05 21:19:54,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:54,900 INFO L482 AbstractCegarLoop]: Abstraction has 9589 states and 28472 transitions. [2021-06-05 21:19:54,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:54,900 INFO L276 IsEmpty]: Start isEmpty. Operand 9589 states and 28472 transitions. [2021-06-05 21:19:54,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:54,909 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:54,909 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:55,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2991 [2021-06-05 21:19:55,109 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:55,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:55,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1158733017, now seen corresponding path program 279 times [2021-06-05 21:19:55,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:55,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399330156] [2021-06-05 21:19:55,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:55,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:55,194 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:55,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:55,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399330156] [2021-06-05 21:19:55,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399330156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:55,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307469025] [2021-06-05 21:19:55,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:55,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:19:55,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:55,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:55,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:55,325 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:55,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307469025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:55,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:55,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 21:19:55,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988690933] [2021-06-05 21:19:55,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:19:55,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:55,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:19:55,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:19:55,326 INFO L87 Difference]: Start difference. First operand 9589 states and 28472 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:55,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:55,706 INFO L93 Difference]: Finished difference Result 11995 states and 35313 transitions. [2021-06-05 21:19:55,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 21:19:55,706 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:55,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:55,720 INFO L225 Difference]: With dead ends: 11995 [2021-06-05 21:19:55,720 INFO L226 Difference]: Without dead ends: 11995 [2021-06-05 21:19:55,721 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 332.3ms TimeCoverageRelationStatistics Valid=699, Invalid=1371, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 21:19:55,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11995 states. [2021-06-05 21:19:55,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11995 to 9342. [2021-06-05 21:19:55,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9342 states, 9341 states have (on average 2.9680976340862864) internal successors, (27725), 9341 states have internal predecessors, (27725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:55,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9342 states to 9342 states and 27725 transitions. [2021-06-05 21:19:55,855 INFO L78 Accepts]: Start accepts. Automaton has 9342 states and 27725 transitions. Word has length 22 [2021-06-05 21:19:55,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:55,855 INFO L482 AbstractCegarLoop]: Abstraction has 9342 states and 27725 transitions. [2021-06-05 21:19:55,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:55,855 INFO L276 IsEmpty]: Start isEmpty. Operand 9342 states and 27725 transitions. [2021-06-05 21:19:55,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:55,862 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:55,862 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:56,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2992 [2021-06-05 21:19:56,071 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:56,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:56,071 INFO L82 PathProgramCache]: Analyzing trace with hash 876299495, now seen corresponding path program 280 times [2021-06-05 21:19:56,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:56,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707899439] [2021-06-05 21:19:56,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:56,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:56,139 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:19:56,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:56,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707899439] [2021-06-05 21:19:56,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707899439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:56,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790479931] [2021-06-05 21:19:56,139 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:56,162 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:19:56,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:56,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:56,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:56,213 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:19:56,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790479931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:56,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:56,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-05 21:19:56,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248596823] [2021-06-05 21:19:56,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:19:56,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:56,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:19:56,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:19:56,214 INFO L87 Difference]: Start difference. First operand 9342 states and 27725 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:56,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:56,468 INFO L93 Difference]: Finished difference Result 9981 states and 29225 transitions. [2021-06-05 21:19:56,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:19:56,468 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:56,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:56,480 INFO L225 Difference]: With dead ends: 9981 [2021-06-05 21:19:56,480 INFO L226 Difference]: Without dead ends: 9981 [2021-06-05 21:19:56,480 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 223.1ms TimeCoverageRelationStatistics Valid=401, Invalid=789, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:19:56,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9981 states. [2021-06-05 21:19:56,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9981 to 9425. [2021-06-05 21:19:56,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9425 states, 9424 states have (on average 2.9691213921901527) internal successors, (27981), 9424 states have internal predecessors, (27981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:56,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9425 states to 9425 states and 27981 transitions. [2021-06-05 21:19:56,607 INFO L78 Accepts]: Start accepts. Automaton has 9425 states and 27981 transitions. Word has length 22 [2021-06-05 21:19:56,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:56,607 INFO L482 AbstractCegarLoop]: Abstraction has 9425 states and 27981 transitions. [2021-06-05 21:19:56,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:56,607 INFO L276 IsEmpty]: Start isEmpty. Operand 9425 states and 27981 transitions. [2021-06-05 21:19:56,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:56,616 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:56,616 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:56,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2993 [2021-06-05 21:19:56,816 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:56,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:56,816 INFO L82 PathProgramCache]: Analyzing trace with hash 369953229, now seen corresponding path program 281 times [2021-06-05 21:19:56,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:56,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433088498] [2021-06-05 21:19:56,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:56,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:56,918 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:56,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:56,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433088498] [2021-06-05 21:19:56,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433088498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:56,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785718339] [2021-06-05 21:19:56,919 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:56,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:19:56,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:56,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:56,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:56,993 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:56,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785718339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:56,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:56,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-05 21:19:56,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301324702] [2021-06-05 21:19:56,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:19:56,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:56,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:19:56,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:19:56,994 INFO L87 Difference]: Start difference. First operand 9425 states and 27981 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:57,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:57,254 INFO L93 Difference]: Finished difference Result 9826 states and 28836 transitions. [2021-06-05 21:19:57,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:19:57,255 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:57,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:57,266 INFO L225 Difference]: With dead ends: 9826 [2021-06-05 21:19:57,266 INFO L226 Difference]: Without dead ends: 9826 [2021-06-05 21:19:57,267 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 260.9ms TimeCoverageRelationStatistics Valid=422, Invalid=838, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 21:19:57,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9826 states. [2021-06-05 21:19:57,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9826 to 8609. [2021-06-05 21:19:57,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8609 states, 8608 states have (on average 2.963638475836431) internal successors, (25511), 8608 states have internal predecessors, (25511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:57,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8609 states to 8609 states and 25511 transitions. [2021-06-05 21:19:57,379 INFO L78 Accepts]: Start accepts. Automaton has 8609 states and 25511 transitions. Word has length 22 [2021-06-05 21:19:57,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:57,379 INFO L482 AbstractCegarLoop]: Abstraction has 8609 states and 25511 transitions. [2021-06-05 21:19:57,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:57,379 INFO L276 IsEmpty]: Start isEmpty. Operand 8609 states and 25511 transitions. [2021-06-05 21:19:57,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:57,386 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:57,386 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:57,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2994 [2021-06-05 21:19:57,586 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:57,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:57,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1853088167, now seen corresponding path program 282 times [2021-06-05 21:19:57,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:57,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36417028] [2021-06-05 21:19:57,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:57,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:57,661 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:19:57,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:57,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36417028] [2021-06-05 21:19:57,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36417028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:57,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086112471] [2021-06-05 21:19:57,662 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:57,688 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:19:57,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:57,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:57,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:57,746 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:19:57,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086112471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:57,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:57,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-05 21:19:57,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606212949] [2021-06-05 21:19:57,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:19:57,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:57,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:19:57,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:19:57,747 INFO L87 Difference]: Start difference. First operand 8609 states and 25511 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:57,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:57,974 INFO L93 Difference]: Finished difference Result 9527 states and 27764 transitions. [2021-06-05 21:19:57,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:19:57,974 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:57,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:57,985 INFO L225 Difference]: With dead ends: 9527 [2021-06-05 21:19:57,985 INFO L226 Difference]: Without dead ends: 9527 [2021-06-05 21:19:57,985 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 210.2ms TimeCoverageRelationStatistics Valid=302, Invalid=690, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:19:57,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9527 states. [2021-06-05 21:19:58,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9527 to 9038. [2021-06-05 21:19:58,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9038 states, 9037 states have (on average 2.9622662387960608) internal successors, (26770), 9037 states have internal predecessors, (26770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:58,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9038 states to 9038 states and 26770 transitions. [2021-06-05 21:19:58,104 INFO L78 Accepts]: Start accepts. Automaton has 9038 states and 26770 transitions. Word has length 22 [2021-06-05 21:19:58,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:58,104 INFO L482 AbstractCegarLoop]: Abstraction has 9038 states and 26770 transitions. [2021-06-05 21:19:58,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:58,104 INFO L276 IsEmpty]: Start isEmpty. Operand 9038 states and 26770 transitions. [2021-06-05 21:19:58,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:58,112 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:58,112 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:58,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2995,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:58,312 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:58,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:58,313 INFO L82 PathProgramCache]: Analyzing trace with hash 585630989, now seen corresponding path program 283 times [2021-06-05 21:19:58,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:58,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806865720] [2021-06-05 21:19:58,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:58,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:58,415 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:58,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:58,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806865720] [2021-06-05 21:19:58,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806865720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:58,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139122296] [2021-06-05 21:19:58,416 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:58,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:58,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:58,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:58,494 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:58,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139122296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:58,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:58,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 21:19:58,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690557283] [2021-06-05 21:19:58,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:19:58,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:58,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:19:58,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:19:58,495 INFO L87 Difference]: Start difference. First operand 9038 states and 26770 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:58,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:58,853 INFO L93 Difference]: Finished difference Result 9636 states and 28011 transitions. [2021-06-05 21:19:58,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 21:19:58,854 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:58,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:58,864 INFO L225 Difference]: With dead ends: 9636 [2021-06-05 21:19:58,864 INFO L226 Difference]: Without dead ends: 9636 [2021-06-05 21:19:58,864 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 318.6ms TimeCoverageRelationStatistics Valid=626, Invalid=1266, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 21:19:58,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9636 states. [2021-06-05 21:19:58,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9636 to 8808. [2021-06-05 21:19:58,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8808 states, 8807 states have (on average 2.9608266151924605) internal successors, (26076), 8807 states have internal predecessors, (26076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:58,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8808 states to 8808 states and 26076 transitions. [2021-06-05 21:19:58,963 INFO L78 Accepts]: Start accepts. Automaton has 8808 states and 26076 transitions. Word has length 22 [2021-06-05 21:19:58,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:58,964 INFO L482 AbstractCegarLoop]: Abstraction has 8808 states and 26076 transitions. [2021-06-05 21:19:58,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:58,964 INFO L276 IsEmpty]: Start isEmpty. Operand 8808 states and 26076 transitions. [2021-06-05 21:19:58,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:58,970 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:58,970 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:59,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2996 [2021-06-05 21:19:59,170 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:59,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:59,171 INFO L82 PathProgramCache]: Analyzing trace with hash -50835865, now seen corresponding path program 284 times [2021-06-05 21:19:59,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:59,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944116861] [2021-06-05 21:19:59,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:59,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:59,268 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:59,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:59,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944116861] [2021-06-05 21:19:59,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944116861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:59,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637908316] [2021-06-05 21:19:59,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:59,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:19:59,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:59,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:19:59,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:59,418 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:59,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637908316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:59,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:59,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 21:19:59,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357117768] [2021-06-05 21:19:59,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:19:59,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:59,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:19:59,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:19:59,419 INFO L87 Difference]: Start difference. First operand 8808 states and 26076 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:59,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:59,825 INFO L93 Difference]: Finished difference Result 9760 states and 28323 transitions. [2021-06-05 21:19:59,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 21:19:59,825 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:19:59,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:59,837 INFO L225 Difference]: With dead ends: 9760 [2021-06-05 21:19:59,837 INFO L226 Difference]: Without dead ends: 9760 [2021-06-05 21:19:59,838 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 367.3ms TimeCoverageRelationStatistics Valid=708, Invalid=1454, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 21:19:59,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9760 states. [2021-06-05 21:19:59,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9760 to 8633. [2021-06-05 21:19:59,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8633 states, 8632 states have (on average 2.9661723818350323) internal successors, (25604), 8632 states have internal predecessors, (25604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:59,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8633 states to 8633 states and 25604 transitions. [2021-06-05 21:19:59,940 INFO L78 Accepts]: Start accepts. Automaton has 8633 states and 25604 transitions. Word has length 22 [2021-06-05 21:19:59,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:59,941 INFO L482 AbstractCegarLoop]: Abstraction has 8633 states and 25604 transitions. [2021-06-05 21:19:59,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:59,941 INFO L276 IsEmpty]: Start isEmpty. Operand 8633 states and 25604 transitions. [2021-06-05 21:19:59,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:19:59,946 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:59,946 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:00,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2997 [2021-06-05 21:20:00,147 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:00,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:00,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1859354147, now seen corresponding path program 285 times [2021-06-05 21:20:00,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:00,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927263080] [2021-06-05 21:20:00,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:00,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:00,234 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:00,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:00,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927263080] [2021-06-05 21:20:00,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927263080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:00,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300582529] [2021-06-05 21:20:00,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:00,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:20:00,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:00,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:20:00,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:00,303 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:00,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300582529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:00,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:00,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-06-05 21:20:00,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359577477] [2021-06-05 21:20:00,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:20:00,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:00,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:20:00,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:20:00,304 INFO L87 Difference]: Start difference. First operand 8633 states and 25604 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:00,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:00,540 INFO L93 Difference]: Finished difference Result 8906 states and 25958 transitions. [2021-06-05 21:20:00,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 21:20:00,541 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:20:00,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:00,552 INFO L225 Difference]: With dead ends: 8906 [2021-06-05 21:20:00,552 INFO L226 Difference]: Without dead ends: 8900 [2021-06-05 21:20:00,552 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 201.6ms TimeCoverageRelationStatistics Valid=307, Invalid=623, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:20:00,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8900 states. [2021-06-05 21:20:00,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8900 to 8631. [2021-06-05 21:20:00,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8631 states, 8630 states have (on average 2.9648899188876014) internal successors, (25587), 8630 states have internal predecessors, (25587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:00,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8631 states to 8631 states and 25587 transitions. [2021-06-05 21:20:00,680 INFO L78 Accepts]: Start accepts. Automaton has 8631 states and 25587 transitions. Word has length 22 [2021-06-05 21:20:00,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:00,681 INFO L482 AbstractCegarLoop]: Abstraction has 8631 states and 25587 transitions. [2021-06-05 21:20:00,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:00,681 INFO L276 IsEmpty]: Start isEmpty. Operand 8631 states and 25587 transitions. [2021-06-05 21:20:00,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:20:00,687 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:00,687 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:00,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2998,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:00,888 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:00,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:00,888 INFO L82 PathProgramCache]: Analyzing trace with hash -903090687, now seen corresponding path program 286 times [2021-06-05 21:20:00,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:00,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474445278] [2021-06-05 21:20:00,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:00,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:00,972 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 7 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:20:00,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:00,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474445278] [2021-06-05 21:20:00,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474445278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:00,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230238406] [2021-06-05 21:20:00,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:01,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:20:01,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:01,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:20:01,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:01,071 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:20:01,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230238406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:01,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:01,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 17 [2021-06-05 21:20:01,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270873099] [2021-06-05 21:20:01,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:20:01,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:01,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:20:01,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:20:01,072 INFO L87 Difference]: Start difference. First operand 8631 states and 25587 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:01,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:01,303 INFO L93 Difference]: Finished difference Result 9990 states and 29311 transitions. [2021-06-05 21:20:01,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:20:01,303 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:20:01,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:01,316 INFO L225 Difference]: With dead ends: 9990 [2021-06-05 21:20:01,316 INFO L226 Difference]: Without dead ends: 9990 [2021-06-05 21:20:01,316 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 212.9ms TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:20:01,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9990 states. [2021-06-05 21:20:01,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9990 to 9751. [2021-06-05 21:20:01,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9751 states, 9750 states have (on average 2.9663589743589744) internal successors, (28922), 9750 states have internal predecessors, (28922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:01,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9751 states to 9751 states and 28922 transitions. [2021-06-05 21:20:01,446 INFO L78 Accepts]: Start accepts. Automaton has 9751 states and 28922 transitions. Word has length 22 [2021-06-05 21:20:01,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:01,446 INFO L482 AbstractCegarLoop]: Abstraction has 9751 states and 28922 transitions. [2021-06-05 21:20:01,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:01,446 INFO L276 IsEmpty]: Start isEmpty. Operand 9751 states and 28922 transitions. [2021-06-05 21:20:01,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:20:01,454 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:01,454 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:01,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2999,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:01,654 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:01,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:01,655 INFO L82 PathProgramCache]: Analyzing trace with hash 2124419431, now seen corresponding path program 287 times [2021-06-05 21:20:01,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:01,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100551869] [2021-06-05 21:20:01,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:01,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:01,740 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:01,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:01,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100551869] [2021-06-05 21:20:01,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100551869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:01,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524210955] [2021-06-05 21:20:01,740 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:01,764 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:20:01,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:01,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:20:01,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:01,825 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:01,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524210955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:01,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:01,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-06-05 21:20:01,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849879583] [2021-06-05 21:20:01,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:20:01,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:01,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:20:01,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:20:01,825 INFO L87 Difference]: Start difference. First operand 9751 states and 28922 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:02,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:02,166 INFO L93 Difference]: Finished difference Result 10086 states and 29515 transitions. [2021-06-05 21:20:02,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:20:02,167 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:20:02,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:02,180 INFO L225 Difference]: With dead ends: 10086 [2021-06-05 21:20:02,180 INFO L226 Difference]: Without dead ends: 10086 [2021-06-05 21:20:02,180 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 301.6ms TimeCoverageRelationStatistics Valid=548, Invalid=1174, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 21:20:02,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10086 states. [2021-06-05 21:20:02,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10086 to 9761. [2021-06-05 21:20:02,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9761 states, 9760 states have (on average 2.966393442622951) internal successors, (28952), 9760 states have internal predecessors, (28952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:02,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9761 states to 9761 states and 28952 transitions. [2021-06-05 21:20:02,320 INFO L78 Accepts]: Start accepts. Automaton has 9761 states and 28952 transitions. Word has length 22 [2021-06-05 21:20:02,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:02,321 INFO L482 AbstractCegarLoop]: Abstraction has 9761 states and 28952 transitions. [2021-06-05 21:20:02,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:02,321 INFO L276 IsEmpty]: Start isEmpty. Operand 9761 states and 28952 transitions. [2021-06-05 21:20:02,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:20:02,329 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:02,329 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:02,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3000,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:02,530 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:02,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:02,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1487952577, now seen corresponding path program 288 times [2021-06-05 21:20:02,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:02,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852770374] [2021-06-05 21:20:02,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:02,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:02,628 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:02,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:02,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852770374] [2021-06-05 21:20:02,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852770374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:02,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168058357] [2021-06-05 21:20:02,629 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:02,653 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:20:02,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:02,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:20:02,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:02,716 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:02,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168058357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:02,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:02,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-06-05 21:20:02,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464477050] [2021-06-05 21:20:02,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:20:02,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:02,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:20:02,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:20:02,717 INFO L87 Difference]: Start difference. First operand 9761 states and 28952 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:03,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:03,124 INFO L93 Difference]: Finished difference Result 11404 states and 33374 transitions. [2021-06-05 21:20:03,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 21:20:03,125 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:20:03,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:03,138 INFO L225 Difference]: With dead ends: 11404 [2021-06-05 21:20:03,139 INFO L226 Difference]: Without dead ends: 11404 [2021-06-05 21:20:03,139 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 353.4ms TimeCoverageRelationStatistics Valid=666, Invalid=1404, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 21:20:03,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11404 states. [2021-06-05 21:20:03,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11404 to 10779. [2021-06-05 21:20:03,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10779 states, 10778 states have (on average 2.9689181666357394) internal successors, (31999), 10778 states have internal predecessors, (31999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:03,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10779 states to 10779 states and 31999 transitions. [2021-06-05 21:20:03,287 INFO L78 Accepts]: Start accepts. Automaton has 10779 states and 31999 transitions. Word has length 22 [2021-06-05 21:20:03,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:03,287 INFO L482 AbstractCegarLoop]: Abstraction has 10779 states and 31999 transitions. [2021-06-05 21:20:03,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:03,287 INFO L276 IsEmpty]: Start isEmpty. Operand 10779 states and 31999 transitions. [2021-06-05 21:20:03,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:20:03,296 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:03,296 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:03,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3001 [2021-06-05 21:20:03,496 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:03,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:03,496 INFO L82 PathProgramCache]: Analyzing trace with hash -53850265, now seen corresponding path program 289 times [2021-06-05 21:20:03,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:03,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299907624] [2021-06-05 21:20:03,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:03,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:03,647 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 7 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:03,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:03,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299907624] [2021-06-05 21:20:03,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299907624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:03,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358914193] [2021-06-05 21:20:03,647 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:03,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:03,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:20:03,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:03,710 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:03,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358914193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:03,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:03,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 16 [2021-06-05 21:20:03,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878156307] [2021-06-05 21:20:03,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:20:03,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:03,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:20:03,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:20:03,711 INFO L87 Difference]: Start difference. First operand 10779 states and 31999 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:03,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:03,952 INFO L93 Difference]: Finished difference Result 10976 states and 32234 transitions. [2021-06-05 21:20:03,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:20:03,952 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:20:03,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:03,967 INFO L225 Difference]: With dead ends: 10976 [2021-06-05 21:20:03,967 INFO L226 Difference]: Without dead ends: 10972 [2021-06-05 21:20:03,967 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 175.4ms TimeCoverageRelationStatistics Valid=266, Invalid=546, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:20:03,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10972 states. [2021-06-05 21:20:04,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10972 to 10779. [2021-06-05 21:20:04,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10779 states, 10778 states have (on average 2.9686398218593433) internal successors, (31996), 10778 states have internal predecessors, (31996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:04,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10779 states to 10779 states and 31996 transitions. [2021-06-05 21:20:04,125 INFO L78 Accepts]: Start accepts. Automaton has 10779 states and 31996 transitions. Word has length 22 [2021-06-05 21:20:04,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:04,125 INFO L482 AbstractCegarLoop]: Abstraction has 10779 states and 31996 transitions. [2021-06-05 21:20:04,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:04,125 INFO L276 IsEmpty]: Start isEmpty. Operand 10779 states and 31996 transitions. [2021-06-05 21:20:04,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:20:04,134 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:04,134 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:04,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3002,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:04,335 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:04,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:04,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1510450393, now seen corresponding path program 290 times [2021-06-05 21:20:04,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:04,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739763020] [2021-06-05 21:20:04,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:04,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:04,428 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 7 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:04,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:04,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739763020] [2021-06-05 21:20:04,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739763020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:04,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053373348] [2021-06-05 21:20:04,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:04,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:20:04,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:04,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:20:04,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:04,536 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:04,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053373348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:04,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:04,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 19 [2021-06-05 21:20:04,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962011007] [2021-06-05 21:20:04,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:20:04,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:04,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:20:04,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:20:04,537 INFO L87 Difference]: Start difference. First operand 10779 states and 31996 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:04,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:04,904 INFO L93 Difference]: Finished difference Result 13145 states and 38658 transitions. [2021-06-05 21:20:04,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 21:20:04,905 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:20:04,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:04,923 INFO L225 Difference]: With dead ends: 13145 [2021-06-05 21:20:04,923 INFO L226 Difference]: Without dead ends: 13145 [2021-06-05 21:20:04,924 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 336.6ms TimeCoverageRelationStatistics Valid=549, Invalid=1257, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 21:20:04,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13145 states. [2021-06-05 21:20:05,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13145 to 12431. [2021-06-05 21:20:05,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12431 states, 12430 states have (on average 2.9723250201126308) internal successors, (36946), 12430 states have internal predecessors, (36946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:05,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12431 states to 12431 states and 36946 transitions. [2021-06-05 21:20:05,110 INFO L78 Accepts]: Start accepts. Automaton has 12431 states and 36946 transitions. Word has length 22 [2021-06-05 21:20:05,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:05,110 INFO L482 AbstractCegarLoop]: Abstraction has 12431 states and 36946 transitions. [2021-06-05 21:20:05,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:05,110 INFO L276 IsEmpty]: Start isEmpty. Operand 12431 states and 36946 transitions. [2021-06-05 21:20:05,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:20:05,120 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:05,120 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:05,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3003,292 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:05,321 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:05,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:05,321 INFO L82 PathProgramCache]: Analyzing trace with hash -808303197, now seen corresponding path program 291 times [2021-06-05 21:20:05,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:05,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13899785] [2021-06-05 21:20:05,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:05,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:05,413 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:05,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:05,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13899785] [2021-06-05 21:20:05,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13899785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:05,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024962725] [2021-06-05 21:20:05,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:05,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:20:05,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:05,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:20:05,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:05,483 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:05,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024962725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:05,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:05,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 16 [2021-06-05 21:20:05,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216054142] [2021-06-05 21:20:05,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:20:05,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:05,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:20:05,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:20:05,484 INFO L87 Difference]: Start difference. First operand 12431 states and 36946 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:05,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:05,696 INFO L93 Difference]: Finished difference Result 12636 states and 37217 transitions. [2021-06-05 21:20:05,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:20:05,696 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:20:05,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:05,712 INFO L225 Difference]: With dead ends: 12636 [2021-06-05 21:20:05,713 INFO L226 Difference]: Without dead ends: 12634 [2021-06-05 21:20:05,713 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 159.1ms TimeCoverageRelationStatistics Valid=231, Invalid=471, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:20:05,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12634 states. [2021-06-05 21:20:05,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12634 to 12451. [2021-06-05 21:20:05,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12451 states, 12450 states have (on average 2.972690763052209) internal successors, (37010), 12450 states have internal predecessors, (37010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:05,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12451 states to 12451 states and 37010 transitions. [2021-06-05 21:20:05,883 INFO L78 Accepts]: Start accepts. Automaton has 12451 states and 37010 transitions. Word has length 22 [2021-06-05 21:20:05,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:05,883 INFO L482 AbstractCegarLoop]: Abstraction has 12451 states and 37010 transitions. [2021-06-05 21:20:05,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:05,883 INFO L276 IsEmpty]: Start isEmpty. Operand 12451 states and 37010 transitions. [2021-06-05 21:20:05,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:20:05,892 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:05,892 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:06,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3004,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:06,093 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:06,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:06,093 INFO L82 PathProgramCache]: Analyzing trace with hash 909445863, now seen corresponding path program 292 times [2021-06-05 21:20:06,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:06,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523812046] [2021-06-05 21:20:06,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:06,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:06,179 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:06,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:06,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523812046] [2021-06-05 21:20:06,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523812046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:06,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546196122] [2021-06-05 21:20:06,180 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:06,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:20:06,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:06,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:20:06,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:06,250 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:20:06,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546196122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:06,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:06,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 16 [2021-06-05 21:20:06,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898964999] [2021-06-05 21:20:06,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:20:06,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:06,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:20:06,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:20:06,251 INFO L87 Difference]: Start difference. First operand 12451 states and 37010 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:06,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:06,442 INFO L93 Difference]: Finished difference Result 13016 states and 38296 transitions. [2021-06-05 21:20:06,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:20:06,442 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:20:06,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:06,459 INFO L225 Difference]: With dead ends: 13016 [2021-06-05 21:20:06,459 INFO L226 Difference]: Without dead ends: 13016 [2021-06-05 21:20:06,459 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 171.9ms TimeCoverageRelationStatistics Valid=266, Invalid=546, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:20:06,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13016 states. [2021-06-05 21:20:06,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13016 to 12452. [2021-06-05 21:20:06,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12452 states, 12451 states have (on average 2.9725323267207453) internal successors, (37011), 12451 states have internal predecessors, (37011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:06,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12452 states to 12452 states and 37011 transitions. [2021-06-05 21:20:06,644 INFO L78 Accepts]: Start accepts. Automaton has 12452 states and 37011 transitions. Word has length 22 [2021-06-05 21:20:06,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:06,644 INFO L482 AbstractCegarLoop]: Abstraction has 12452 states and 37011 transitions. [2021-06-05 21:20:06,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:06,644 INFO L276 IsEmpty]: Start isEmpty. Operand 12452 states and 37011 transitions. [2021-06-05 21:20:06,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:20:06,654 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:06,654 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:06,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3005,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:06,855 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:06,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:06,855 INFO L82 PathProgramCache]: Analyzing trace with hash -819601471, now seen corresponding path program 293 times [2021-06-05 21:20:06,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:06,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357172974] [2021-06-05 21:20:06,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:06,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:06,939 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:06,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:06,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357172974] [2021-06-05 21:20:06,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357172974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:06,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965760578] [2021-06-05 21:20:06,939 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:06,964 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:20:06,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:06,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:20:06,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:07,020 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:07,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965760578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:07,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:07,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 17 [2021-06-05 21:20:07,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290691417] [2021-06-05 21:20:07,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:20:07,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:07,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:20:07,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:20:07,020 INFO L87 Difference]: Start difference. First operand 12452 states and 37011 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:07,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:07,258 INFO L93 Difference]: Finished difference Result 13404 states and 39370 transitions. [2021-06-05 21:20:07,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:20:07,259 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:20:07,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:07,277 INFO L225 Difference]: With dead ends: 13404 [2021-06-05 21:20:07,278 INFO L226 Difference]: Without dead ends: 13404 [2021-06-05 21:20:07,278 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 218.3ms TimeCoverageRelationStatistics Valid=375, Invalid=815, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:20:07,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13404 states. [2021-06-05 21:20:07,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13404 to 12456. [2021-06-05 21:20:07,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12456 states, 12455 states have (on average 2.972380570052188) internal successors, (37021), 12455 states have internal predecessors, (37021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:07,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12456 states to 12456 states and 37021 transitions. [2021-06-05 21:20:07,506 INFO L78 Accepts]: Start accepts. Automaton has 12456 states and 37021 transitions. Word has length 22 [2021-06-05 21:20:07,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:07,506 INFO L482 AbstractCegarLoop]: Abstraction has 12456 states and 37021 transitions. [2021-06-05 21:20:07,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:07,507 INFO L276 IsEmpty]: Start isEmpty. Operand 12456 states and 37021 transitions. [2021-06-05 21:20:07,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:20:07,517 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:07,517 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:07,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3006,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:07,717 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:07,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:07,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1414506023, now seen corresponding path program 294 times [2021-06-05 21:20:07,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:07,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103181011] [2021-06-05 21:20:07,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:07,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:07,814 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:07,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:07,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103181011] [2021-06-05 21:20:07,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103181011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:07,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420978586] [2021-06-05 21:20:07,814 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:07,839 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:20:07,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:07,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:20:07,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:07,895 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:20:07,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420978586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:07,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:07,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 17 [2021-06-05 21:20:07,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923959964] [2021-06-05 21:20:07,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:20:07,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:07,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:20:07,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:20:07,896 INFO L87 Difference]: Start difference. First operand 12456 states and 37021 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:08,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:08,223 INFO L93 Difference]: Finished difference Result 15061 states and 44163 transitions. [2021-06-05 21:20:08,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 21:20:08,223 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:20:08,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:08,244 INFO L225 Difference]: With dead ends: 15061 [2021-06-05 21:20:08,244 INFO L226 Difference]: Without dead ends: 15061 [2021-06-05 21:20:08,244 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 278.9ms TimeCoverageRelationStatistics Valid=471, Invalid=1089, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 21:20:08,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15061 states. [2021-06-05 21:20:08,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15061 to 13737. [2021-06-05 21:20:08,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13737 states, 13736 states have (on average 2.9764123471170647) internal successors, (40884), 13736 states have internal predecessors, (40884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:08,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13737 states to 13737 states and 40884 transitions. [2021-06-05 21:20:08,446 INFO L78 Accepts]: Start accepts. Automaton has 13737 states and 40884 transitions. Word has length 22 [2021-06-05 21:20:08,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:08,446 INFO L482 AbstractCegarLoop]: Abstraction has 13737 states and 40884 transitions. [2021-06-05 21:20:08,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:08,446 INFO L276 IsEmpty]: Start isEmpty. Operand 13737 states and 40884 transitions. [2021-06-05 21:20:08,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:20:08,457 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:08,457 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:08,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3007,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:08,657 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:08,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:08,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1952361601, now seen corresponding path program 295 times [2021-06-05 21:20:08,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:08,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336206346] [2021-06-05 21:20:08,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:08,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:08,744 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:08,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:08,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336206346] [2021-06-05 21:20:08,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336206346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:08,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314833714] [2021-06-05 21:20:08,744 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:08,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:08,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:20:08,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:08,843 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:08,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314833714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:08,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:08,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 18 [2021-06-05 21:20:08,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506713803] [2021-06-05 21:20:08,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:20:08,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:08,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:20:08,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:20:08,844 INFO L87 Difference]: Start difference. First operand 13737 states and 40884 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:09,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:09,182 INFO L93 Difference]: Finished difference Result 14989 states and 43964 transitions. [2021-06-05 21:20:09,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 21:20:09,182 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:20:09,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:09,200 INFO L225 Difference]: With dead ends: 14989 [2021-06-05 21:20:09,200 INFO L226 Difference]: Without dead ends: 14989 [2021-06-05 21:20:09,201 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 312.7ms TimeCoverageRelationStatistics Valid=523, Invalid=1199, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 21:20:09,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14989 states. [2021-06-05 21:20:09,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14989 to 13759. [2021-06-05 21:20:09,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13759 states, 13758 states have (on average 2.9763773804332025) internal successors, (40949), 13758 states have internal predecessors, (40949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:09,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13759 states to 13759 states and 40949 transitions. [2021-06-05 21:20:09,408 INFO L78 Accepts]: Start accepts. Automaton has 13759 states and 40949 transitions. Word has length 22 [2021-06-05 21:20:09,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:09,408 INFO L482 AbstractCegarLoop]: Abstraction has 13759 states and 40949 transitions. [2021-06-05 21:20:09,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:09,408 INFO L276 IsEmpty]: Start isEmpty. Operand 13759 states and 40949 transitions. [2021-06-05 21:20:09,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:20:09,419 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:09,419 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:09,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3008 [2021-06-05 21:20:09,620 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:09,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:09,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1446015335, now seen corresponding path program 296 times [2021-06-05 21:20:09,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:09,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023722563] [2021-06-05 21:20:09,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:09,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:09,707 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:09,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:09,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023722563] [2021-06-05 21:20:09,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023722563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:09,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174112926] [2021-06-05 21:20:09,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:09,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:20:09,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:09,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:20:09,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:09,795 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:20:09,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174112926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:09,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:09,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 18 [2021-06-05 21:20:09,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884350020] [2021-06-05 21:20:09,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:20:09,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:09,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:20:09,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:20:09,796 INFO L87 Difference]: Start difference. First operand 13759 states and 40949 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:10,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:10,158 INFO L93 Difference]: Finished difference Result 17231 states and 50882 transitions. [2021-06-05 21:20:10,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 21:20:10,159 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:20:10,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:10,181 INFO L225 Difference]: With dead ends: 17231 [2021-06-05 21:20:10,182 INFO L226 Difference]: Without dead ends: 17231 [2021-06-05 21:20:10,182 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 299.8ms TimeCoverageRelationStatistics Valid=518, Invalid=1204, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 21:20:10,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17231 states. [2021-06-05 21:20:10,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17231 to 16400. [2021-06-05 21:20:10,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16400 states, 16399 states have (on average 2.9804256357094947) internal successors, (48876), 16399 states have internal predecessors, (48876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:10,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16400 states to 16400 states and 48876 transitions. [2021-06-05 21:20:10,428 INFO L78 Accepts]: Start accepts. Automaton has 16400 states and 48876 transitions. Word has length 22 [2021-06-05 21:20:10,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:10,428 INFO L482 AbstractCegarLoop]: Abstraction has 16400 states and 48876 transitions. [2021-06-05 21:20:10,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:10,428 INFO L276 IsEmpty]: Start isEmpty. Operand 16400 states and 48876 transitions. [2021-06-05 21:20:10,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:20:10,440 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:10,440 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:10,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3009 [2021-06-05 21:20:10,640 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:10,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:10,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1365817023, now seen corresponding path program 297 times [2021-06-05 21:20:10,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:10,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388516599] [2021-06-05 21:20:10,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:10,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:10,744 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:10,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:10,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388516599] [2021-06-05 21:20:10,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388516599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:10,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92243613] [2021-06-05 21:20:10,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:10,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:20:10,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:10,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:20:10,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:10,842 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:10,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92243613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:10,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:10,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 19 [2021-06-05 21:20:10,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186452768] [2021-06-05 21:20:10,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:20:10,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:10,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:20:10,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:20:10,843 INFO L87 Difference]: Start difference. First operand 16400 states and 48876 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:11,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:11,188 INFO L93 Difference]: Finished difference Result 17044 states and 50389 transitions. [2021-06-05 21:20:11,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:20:11,189 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:20:11,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:11,206 INFO L225 Difference]: With dead ends: 17044 [2021-06-05 21:20:11,206 INFO L226 Difference]: Without dead ends: 17044 [2021-06-05 21:20:11,206 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 288.1ms TimeCoverageRelationStatistics Valid=459, Invalid=1101, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 21:20:11,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17044 states. [2021-06-05 21:20:11,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17044 to 16341. [2021-06-05 21:20:11,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16341 states, 16340 states have (on average 2.980232558139535) internal successors, (48697), 16340 states have internal predecessors, (48697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:11,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16341 states to 16341 states and 48697 transitions. [2021-06-05 21:20:11,441 INFO L78 Accepts]: Start accepts. Automaton has 16341 states and 48697 transitions. Word has length 22 [2021-06-05 21:20:11,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:11,441 INFO L482 AbstractCegarLoop]: Abstraction has 16341 states and 48697 transitions. [2021-06-05 21:20:11,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:11,441 INFO L276 IsEmpty]: Start isEmpty. Operand 16341 states and 48697 transitions. [2021-06-05 21:20:11,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:20:11,453 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:11,453 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:11,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3010,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:11,654 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:11,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:11,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1661693095, now seen corresponding path program 298 times [2021-06-05 21:20:11,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:11,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677138285] [2021-06-05 21:20:11,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:11,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:11,746 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:11,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:11,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677138285] [2021-06-05 21:20:11,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677138285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:11,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153844359] [2021-06-05 21:20:11,746 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:11,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:20:11,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:11,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:20:11,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:11,840 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:20:11,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153844359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:11,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:11,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 19 [2021-06-05 21:20:11,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135422042] [2021-06-05 21:20:11,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:20:11,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:11,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:20:11,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:20:11,841 INFO L87 Difference]: Start difference. First operand 16341 states and 48697 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:12,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:12,131 INFO L93 Difference]: Finished difference Result 18181 states and 53895 transitions. [2021-06-05 21:20:12,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:20:12,132 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:20:12,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:12,156 INFO L225 Difference]: With dead ends: 18181 [2021-06-05 21:20:12,157 INFO L226 Difference]: Without dead ends: 18181 [2021-06-05 21:20:12,157 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 276.9ms TimeCoverageRelationStatistics Valid=427, Invalid=1055, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 21:20:12,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18181 states. [2021-06-05 21:20:12,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18181 to 17672. [2021-06-05 21:20:12,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17672 states, 17671 states have (on average 2.982287363476883) internal successors, (52700), 17671 states have internal predecessors, (52700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:12,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17672 states to 17672 states and 52700 transitions. [2021-06-05 21:20:12,408 INFO L78 Accepts]: Start accepts. Automaton has 17672 states and 52700 transitions. Word has length 22 [2021-06-05 21:20:12,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:12,408 INFO L482 AbstractCegarLoop]: Abstraction has 17672 states and 52700 transitions. [2021-06-05 21:20:12,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:12,408 INFO L276 IsEmpty]: Start isEmpty. Operand 17672 states and 52700 transitions. [2021-06-05 21:20:12,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:20:12,423 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:12,423 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:12,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3011 [2021-06-05 21:20:12,624 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:12,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:12,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1025226241, now seen corresponding path program 299 times [2021-06-05 21:20:12,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:12,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36702519] [2021-06-05 21:20:12,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:12,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:12,718 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:12,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:12,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36702519] [2021-06-05 21:20:12,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36702519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:12,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392759839] [2021-06-05 21:20:12,719 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:12,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:20:12,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:12,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:20:12,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:12,842 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:12,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392759839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:12,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:12,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 20 [2021-06-05 21:20:12,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084021970] [2021-06-05 21:20:12,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:20:12,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:12,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:20:12,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:20:12,843 INFO L87 Difference]: Start difference. First operand 17672 states and 52700 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:13,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:13,175 INFO L93 Difference]: Finished difference Result 18327 states and 54324 transitions. [2021-06-05 21:20:13,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:20:13,176 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:20:13,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:13,203 INFO L225 Difference]: With dead ends: 18327 [2021-06-05 21:20:13,204 INFO L226 Difference]: Without dead ends: 18327 [2021-06-05 21:20:13,204 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 304.3ms TimeCoverageRelationStatistics Valid=469, Invalid=1171, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 21:20:13,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18327 states. [2021-06-05 21:20:13,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18327 to 17682. [2021-06-05 21:20:13,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17682 states, 17681 states have (on average 2.982240823482835) internal successors, (52729), 17681 states have internal predecessors, (52729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:13,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17682 states to 17682 states and 52729 transitions. [2021-06-05 21:20:13,479 INFO L78 Accepts]: Start accepts. Automaton has 17682 states and 52729 transitions. Word has length 22 [2021-06-05 21:20:13,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:13,479 INFO L482 AbstractCegarLoop]: Abstraction has 17682 states and 52729 transitions. [2021-06-05 21:20:13,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:13,479 INFO L276 IsEmpty]: Start isEmpty. Operand 17682 states and 52729 transitions. [2021-06-05 21:20:13,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 21:20:13,493 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:13,493 INFO L554 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:13,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 301 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3012 [2021-06-05 21:20:13,694 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:13,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:13,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1525377049, now seen corresponding path program 300 times [2021-06-05 21:20:13,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:13,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413091677] [2021-06-05 21:20:13,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:13,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:13,793 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:13,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:13,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413091677] [2021-06-05 21:20:13,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413091677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:13,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827404778] [2021-06-05 21:20:13,793 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:13,817 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:20:13,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:13,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:20:13,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:13,907 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:13,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827404778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:13,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:13,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-06-05 21:20:13,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623894931] [2021-06-05 21:20:13,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:20:13,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:13,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:20:13,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:20:13,908 INFO L87 Difference]: Start difference. First operand 17682 states and 52729 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:14,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:14,392 INFO L93 Difference]: Finished difference Result 19601 states and 58121 transitions. [2021-06-05 21:20:14,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 21:20:14,393 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 21:20:14,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:14,422 INFO L225 Difference]: With dead ends: 19601 [2021-06-05 21:20:14,422 INFO L226 Difference]: Without dead ends: 19601 [2021-06-05 21:20:14,423 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 431.7ms TimeCoverageRelationStatistics Valid=858, Invalid=2004, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 21:20:14,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19601 states. [2021-06-05 21:20:14,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19601 to 17866. [2021-06-05 21:20:14,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17866 states, 17865 states have (on average 2.9824797089280715) internal successors, (53282), 17865 states have internal predecessors, (53282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:14,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17866 states to 17866 states and 53282 transitions. [2021-06-05 21:20:14,763 INFO L78 Accepts]: Start accepts. Automaton has 17866 states and 53282 transitions. Word has length 22 [2021-06-05 21:20:14,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:14,763 INFO L482 AbstractCegarLoop]: Abstraction has 17866 states and 53282 transitions. [2021-06-05 21:20:14,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:14,763 INFO L276 IsEmpty]: Start isEmpty. Operand 17866 states and 53282 transitions. [2021-06-05 21:20:14,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:20:14,777 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:14,777 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:14,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3013,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:14,977 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:14,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:14,978 INFO L82 PathProgramCache]: Analyzing trace with hash -120035998, now seen corresponding path program 301 times [2021-06-05 21:20:14,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:14,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503864403] [2021-06-05 21:20:14,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:14,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:15,033 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:15,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:15,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503864403] [2021-06-05 21:20:15,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503864403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:15,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201646975] [2021-06-05 21:20:15,033 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:15,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:15,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:20:15,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:15,106 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:20:15,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201646975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:15,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:15,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-06-05 21:20:15,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979731240] [2021-06-05 21:20:15,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:20:15,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:15,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:20:15,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:20:15,107 INFO L87 Difference]: Start difference. First operand 17866 states and 53282 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:15,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:15,314 INFO L93 Difference]: Finished difference Result 18113 states and 53632 transitions. [2021-06-05 21:20:15,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:20:15,315 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:20:15,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:15,343 INFO L225 Difference]: With dead ends: 18113 [2021-06-05 21:20:15,343 INFO L226 Difference]: Without dead ends: 18109 [2021-06-05 21:20:15,343 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 116.1ms TimeCoverageRelationStatistics Valid=225, Invalid=425, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:20:15,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18109 states. [2021-06-05 21:20:15,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18109 to 17844. [2021-06-05 21:20:15,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17844 states, 17843 states have (on average 2.981393263464664) internal successors, (53197), 17843 states have internal predecessors, (53197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:15,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17844 states to 17844 states and 53197 transitions. [2021-06-05 21:20:15,628 INFO L78 Accepts]: Start accepts. Automaton has 17844 states and 53197 transitions. Word has length 23 [2021-06-05 21:20:15,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:15,628 INFO L482 AbstractCegarLoop]: Abstraction has 17844 states and 53197 transitions. [2021-06-05 21:20:15,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:15,628 INFO L276 IsEmpty]: Start isEmpty. Operand 17844 states and 53197 transitions. [2021-06-05 21:20:15,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:20:15,644 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:15,644 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:15,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3014,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:15,844 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:15,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:15,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1369368998, now seen corresponding path program 302 times [2021-06-05 21:20:15,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:15,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380015793] [2021-06-05 21:20:15,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:15,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:15,904 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 20 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:20:15,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:15,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380015793] [2021-06-05 21:20:15,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380015793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:15,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026071696] [2021-06-05 21:20:15,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:15,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:20:15,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:15,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:20:15,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:15,968 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 30 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:20:15,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026071696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:15,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:15,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-06-05 21:20:15,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424741676] [2021-06-05 21:20:15,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:20:15,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:15,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:20:15,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:20:15,969 INFO L87 Difference]: Start difference. First operand 17844 states and 53197 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:16,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:16,189 INFO L93 Difference]: Finished difference Result 18088 states and 53547 transitions. [2021-06-05 21:20:16,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:20:16,190 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:20:16,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:16,215 INFO L225 Difference]: With dead ends: 18088 [2021-06-05 21:20:16,215 INFO L226 Difference]: Without dead ends: 18082 [2021-06-05 21:20:16,216 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 133.4ms TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:20:16,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18082 states. [2021-06-05 21:20:16,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18082 to 17833. [2021-06-05 21:20:16,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17833 states, 17832 states have (on average 2.980820995962315) internal successors, (53154), 17832 states have internal predecessors, (53154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:16,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17833 states to 17833 states and 53154 transitions. [2021-06-05 21:20:16,488 INFO L78 Accepts]: Start accepts. Automaton has 17833 states and 53154 transitions. Word has length 23 [2021-06-05 21:20:16,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:16,488 INFO L482 AbstractCegarLoop]: Abstraction has 17833 states and 53154 transitions. [2021-06-05 21:20:16,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:16,488 INFO L276 IsEmpty]: Start isEmpty. Operand 17833 states and 53154 transitions. [2021-06-05 21:20:16,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:20:16,503 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:16,503 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:16,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3015,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:16,703 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:16,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:16,704 INFO L82 PathProgramCache]: Analyzing trace with hash 296283618, now seen corresponding path program 303 times [2021-06-05 21:20:16,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:16,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709280393] [2021-06-05 21:20:16,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:16,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:16,776 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 22 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:16,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:16,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709280393] [2021-06-05 21:20:16,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709280393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:16,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502323815] [2021-06-05 21:20:16,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:16,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 21:20:16,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:16,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:20:16,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:16,844 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:16,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502323815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:16,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:16,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:20:16,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337339559] [2021-06-05 21:20:16,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:20:16,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:16,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:20:16,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:20:16,844 INFO L87 Difference]: Start difference. First operand 17833 states and 53154 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:17,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:17,076 INFO L93 Difference]: Finished difference Result 18081 states and 53510 transitions. [2021-06-05 21:20:17,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:20:17,077 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:20:17,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:17,099 INFO L225 Difference]: With dead ends: 18081 [2021-06-05 21:20:17,099 INFO L226 Difference]: Without dead ends: 18075 [2021-06-05 21:20:17,099 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 156.3ms TimeCoverageRelationStatistics Valid=292, Invalid=578, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:20:17,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18075 states. [2021-06-05 21:20:17,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18075 to 17833. [2021-06-05 21:20:17,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17833 states, 17832 states have (on average 2.9803723642889186) internal successors, (53146), 17832 states have internal predecessors, (53146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:17,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17833 states to 17833 states and 53146 transitions. [2021-06-05 21:20:17,355 INFO L78 Accepts]: Start accepts. Automaton has 17833 states and 53146 transitions. Word has length 23 [2021-06-05 21:20:17,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:17,356 INFO L482 AbstractCegarLoop]: Abstraction has 17833 states and 53146 transitions. [2021-06-05 21:20:17,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:17,356 INFO L276 IsEmpty]: Start isEmpty. Operand 17833 states and 53146 transitions. [2021-06-05 21:20:17,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:20:17,371 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:17,371 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:17,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3016 [2021-06-05 21:20:17,571 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:17,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:17,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1390375206, now seen corresponding path program 304 times [2021-06-05 21:20:17,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:17,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203391215] [2021-06-05 21:20:17,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:17,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:17,641 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:17,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:17,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203391215] [2021-06-05 21:20:17,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203391215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:17,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125423227] [2021-06-05 21:20:17,641 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:17,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:20:17,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:17,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:20:17,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:17,808 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:20:17,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125423227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:17,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:17,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-06-05 21:20:17,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838687182] [2021-06-05 21:20:17,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:20:17,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:17,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:20:17,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:20:17,809 INFO L87 Difference]: Start difference. First operand 17833 states and 53146 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:18,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:18,042 INFO L93 Difference]: Finished difference Result 18366 states and 54302 transitions. [2021-06-05 21:20:18,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:20:18,043 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:20:18,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:18,070 INFO L225 Difference]: With dead ends: 18366 [2021-06-05 21:20:18,070 INFO L226 Difference]: Without dead ends: 18358 [2021-06-05 21:20:18,070 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 148.4ms TimeCoverageRelationStatistics Valid=241, Invalid=515, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:20:18,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18358 states. [2021-06-05 21:20:18,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18358 to 17840. [2021-06-05 21:20:18,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17840 states, 17839 states have (on average 2.98009978137788) internal successors, (53162), 17839 states have internal predecessors, (53162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:18,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17840 states to 17840 states and 53162 transitions. [2021-06-05 21:20:18,331 INFO L78 Accepts]: Start accepts. Automaton has 17840 states and 53162 transitions. Word has length 23 [2021-06-05 21:20:18,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:18,331 INFO L482 AbstractCegarLoop]: Abstraction has 17840 states and 53162 transitions. [2021-06-05 21:20:18,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:18,331 INFO L276 IsEmpty]: Start isEmpty. Operand 17840 states and 53162 transitions. [2021-06-05 21:20:18,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:20:18,345 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:18,345 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:18,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3017,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:18,546 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:18,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:18,546 INFO L82 PathProgramCache]: Analyzing trace with hash 900986926, now seen corresponding path program 305 times [2021-06-05 21:20:18,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:18,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486426177] [2021-06-05 21:20:18,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:18,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:18,624 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 23 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:18,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:18,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486426177] [2021-06-05 21:20:18,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486426177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:18,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87752543] [2021-06-05 21:20:18,624 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:18,650 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:20:18,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:18,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:20:18,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:18,683 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 30 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:20:18,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87752543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:18,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:18,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-06-05 21:20:18,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117125902] [2021-06-05 21:20:18,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:20:18,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:18,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:20:18,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:20:18,684 INFO L87 Difference]: Start difference. First operand 17840 states and 53162 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:18,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:18,913 INFO L93 Difference]: Finished difference Result 18066 states and 53531 transitions. [2021-06-05 21:20:18,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:20:18,914 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:20:18,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:18,940 INFO L225 Difference]: With dead ends: 18066 [2021-06-05 21:20:18,940 INFO L226 Difference]: Without dead ends: 18058 [2021-06-05 21:20:18,941 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 148.5ms TimeCoverageRelationStatistics Valid=268, Invalid=544, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:20:18,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18058 states. [2021-06-05 21:20:19,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18058 to 17835. [2021-06-05 21:20:19,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17835 states, 17834 states have (on average 2.9798138387350006) internal successors, (53142), 17834 states have internal predecessors, (53142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:19,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17835 states to 17835 states and 53142 transitions. [2021-06-05 21:20:19,216 INFO L78 Accepts]: Start accepts. Automaton has 17835 states and 53142 transitions. Word has length 23 [2021-06-05 21:20:19,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:19,216 INFO L482 AbstractCegarLoop]: Abstraction has 17835 states and 53142 transitions. [2021-06-05 21:20:19,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:19,216 INFO L276 IsEmpty]: Start isEmpty. Operand 17835 states and 53142 transitions. [2021-06-05 21:20:19,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:20:19,231 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:19,231 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:19,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3018 [2021-06-05 21:20:19,432 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:19,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:19,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1037982158, now seen corresponding path program 306 times [2021-06-05 21:20:19,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:19,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729022244] [2021-06-05 21:20:19,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:19,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:19,481 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 18 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:20:19,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:19,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729022244] [2021-06-05 21:20:19,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729022244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:19,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530683253] [2021-06-05 21:20:19,481 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:19,507 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:20:19,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:19,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:20:19,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:19,549 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 22 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:20:19,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530683253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:19,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:19,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:20:19,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988275284] [2021-06-05 21:20:19,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:20:19,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:19,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:20:19,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:20:19,549 INFO L87 Difference]: Start difference. First operand 17835 states and 53142 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:19,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:19,661 INFO L93 Difference]: Finished difference Result 18191 states and 53712 transitions. [2021-06-05 21:20:19,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:20:19,661 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:20:19,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:19,686 INFO L225 Difference]: With dead ends: 18191 [2021-06-05 21:20:19,686 INFO L226 Difference]: Without dead ends: 18189 [2021-06-05 21:20:19,686 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 59.8ms TimeCoverageRelationStatistics Valid=100, Invalid=140, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:20:19,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18189 states. [2021-06-05 21:20:19,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18189 to 17847. [2021-06-05 21:20:19,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17847 states, 17846 states have (on average 2.979379132578729) internal successors, (53170), 17846 states have internal predecessors, (53170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:19,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17847 states to 17847 states and 53170 transitions. [2021-06-05 21:20:19,962 INFO L78 Accepts]: Start accepts. Automaton has 17847 states and 53170 transitions. Word has length 23 [2021-06-05 21:20:19,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:19,962 INFO L482 AbstractCegarLoop]: Abstraction has 17847 states and 53170 transitions. [2021-06-05 21:20:19,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:19,962 INFO L276 IsEmpty]: Start isEmpty. Operand 17847 states and 53170 transitions. [2021-06-05 21:20:19,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:20:19,977 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:19,978 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:20,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3019,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:20,178 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:20,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:20,178 INFO L82 PathProgramCache]: Analyzing trace with hash 707472532, now seen corresponding path program 307 times [2021-06-05 21:20:20,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:20,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175829368] [2021-06-05 21:20:20,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:20,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:20,233 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:20,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:20,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175829368] [2021-06-05 21:20:20,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175829368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:20,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564769584] [2021-06-05 21:20:20,233 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:20,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:20,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:20:20,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:20,297 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:20:20,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564769584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:20,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:20,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-06-05 21:20:20,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098727359] [2021-06-05 21:20:20,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:20:20,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:20,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:20:20,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:20:20,298 INFO L87 Difference]: Start difference. First operand 17847 states and 53170 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:20,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:20,456 INFO L93 Difference]: Finished difference Result 18272 states and 53872 transitions. [2021-06-05 21:20:20,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:20:20,457 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:20:20,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:20,485 INFO L225 Difference]: With dead ends: 18272 [2021-06-05 21:20:20,485 INFO L226 Difference]: Without dead ends: 18271 [2021-06-05 21:20:20,485 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 79.9ms TimeCoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:20:20,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18271 states. [2021-06-05 21:20:20,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18271 to 17840. [2021-06-05 21:20:20,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17840 states, 17839 states have (on average 2.9784180727619263) internal successors, (53132), 17839 states have internal predecessors, (53132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:20,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17840 states to 17840 states and 53132 transitions. [2021-06-05 21:20:20,821 INFO L78 Accepts]: Start accepts. Automaton has 17840 states and 53132 transitions. Word has length 23 [2021-06-05 21:20:20,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:20,821 INFO L482 AbstractCegarLoop]: Abstraction has 17840 states and 53132 transitions. [2021-06-05 21:20:20,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:20,821 INFO L276 IsEmpty]: Start isEmpty. Operand 17840 states and 53132 transitions. [2021-06-05 21:20:20,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:20:20,834 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:20,834 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:21,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3020 [2021-06-05 21:20:21,035 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:21,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:21,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1876881456, now seen corresponding path program 308 times [2021-06-05 21:20:21,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:21,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902243733] [2021-06-05 21:20:21,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:21,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:21,091 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:20:21,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:21,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902243733] [2021-06-05 21:20:21,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902243733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:21,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685143471] [2021-06-05 21:20:21,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:21,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:20:21,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:21,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:20:21,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:21,150 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:20:21,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685143471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:21,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:21,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-06-05 21:20:21,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839091777] [2021-06-05 21:20:21,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:20:21,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:21,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:20:21,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:20:21,151 INFO L87 Difference]: Start difference. First operand 17840 states and 53132 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:21,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:21,356 INFO L93 Difference]: Finished difference Result 18131 states and 53544 transitions. [2021-06-05 21:20:21,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:20:21,356 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:20:21,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:21,383 INFO L225 Difference]: With dead ends: 18131 [2021-06-05 21:20:21,383 INFO L226 Difference]: Without dead ends: 18126 [2021-06-05 21:20:21,383 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 113.6ms TimeCoverageRelationStatistics Valid=210, Invalid=390, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:20:21,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18126 states. [2021-06-05 21:20:21,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18126 to 17829. [2021-06-05 21:20:21,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17829 states, 17828 states have (on average 2.976946376486426) internal successors, (53073), 17828 states have internal predecessors, (53073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:21,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17829 states to 17829 states and 53073 transitions. [2021-06-05 21:20:21,663 INFO L78 Accepts]: Start accepts. Automaton has 17829 states and 53073 transitions. Word has length 23 [2021-06-05 21:20:21,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:21,664 INFO L482 AbstractCegarLoop]: Abstraction has 17829 states and 53073 transitions. [2021-06-05 21:20:21,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:21,664 INFO L276 IsEmpty]: Start isEmpty. Operand 17829 states and 53073 transitions. [2021-06-05 21:20:21,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:20:21,678 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:21,678 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:21,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3021 [2021-06-05 21:20:21,879 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:21,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:21,879 INFO L82 PathProgramCache]: Analyzing trace with hash -387476460, now seen corresponding path program 309 times [2021-06-05 21:20:21,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:21,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216156829] [2021-06-05 21:20:21,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:21,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:21,942 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 20 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:21,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:21,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216156829] [2021-06-05 21:20:21,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216156829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:21,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699786230] [2021-06-05 21:20:21,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:21,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:20:21,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:21,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:20:21,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:22,003 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 23 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:22,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699786230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:22,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:22,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:20:22,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723819613] [2021-06-05 21:20:22,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:20:22,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:22,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:20:22,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:20:22,004 INFO L87 Difference]: Start difference. First operand 17829 states and 53073 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:22,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:22,235 INFO L93 Difference]: Finished difference Result 18120 states and 53485 transitions. [2021-06-05 21:20:22,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:20:22,235 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:20:22,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:22,261 INFO L225 Difference]: With dead ends: 18120 [2021-06-05 21:20:22,262 INFO L226 Difference]: Without dead ends: 18110 [2021-06-05 21:20:22,262 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 127.2ms TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:20:22,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18110 states. [2021-06-05 21:20:22,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18110 to 17810. [2021-06-05 21:20:22,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17810 states, 17809 states have (on average 2.9759110562075355) internal successors, (52998), 17809 states have internal predecessors, (52998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:22,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17810 states to 17810 states and 52998 transitions. [2021-06-05 21:20:22,553 INFO L78 Accepts]: Start accepts. Automaton has 17810 states and 52998 transitions. Word has length 23 [2021-06-05 21:20:22,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:22,553 INFO L482 AbstractCegarLoop]: Abstraction has 17810 states and 52998 transitions. [2021-06-05 21:20:22,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:22,553 INFO L276 IsEmpty]: Start isEmpty. Operand 17810 states and 52998 transitions. [2021-06-05 21:20:22,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:20:22,569 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:22,569 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:22,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3022,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:22,769 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:22,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:22,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1460561840, now seen corresponding path program 310 times [2021-06-05 21:20:22,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:22,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74147299] [2021-06-05 21:20:22,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:22,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:22,837 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 20 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:20:22,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:22,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74147299] [2021-06-05 21:20:22,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74147299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:22,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917579488] [2021-06-05 21:20:22,837 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:22,860 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:20:22,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:22,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:20:22,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:22,893 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:20:22,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917579488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:22,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:22,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-06-05 21:20:22,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786944882] [2021-06-05 21:20:22,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:20:22,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:22,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:20:22,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:20:22,894 INFO L87 Difference]: Start difference. First operand 17810 states and 52998 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:23,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:23,075 INFO L93 Difference]: Finished difference Result 18994 states and 55842 transitions. [2021-06-05 21:20:23,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:20:23,075 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:20:23,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:23,099 INFO L225 Difference]: With dead ends: 18994 [2021-06-05 21:20:23,100 INFO L226 Difference]: Without dead ends: 18988 [2021-06-05 21:20:23,100 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 116.3ms TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:20:23,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18988 states. [2021-06-05 21:20:23,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18988 to 17829. [2021-06-05 21:20:23,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17829 states, 17828 states have (on average 2.9754319048687456) internal successors, (53046), 17828 states have internal predecessors, (53046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:23,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17829 states to 17829 states and 53046 transitions. [2021-06-05 21:20:23,365 INFO L78 Accepts]: Start accepts. Automaton has 17829 states and 53046 transitions. Word has length 23 [2021-06-05 21:20:23,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:23,365 INFO L482 AbstractCegarLoop]: Abstraction has 17829 states and 53046 transitions. [2021-06-05 21:20:23,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:23,365 INFO L276 IsEmpty]: Start isEmpty. Operand 17829 states and 53046 transitions. [2021-06-05 21:20:23,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:20:23,378 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:23,379 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:23,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3023 [2021-06-05 21:20:23,579 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:23,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:23,579 INFO L82 PathProgramCache]: Analyzing trace with hash -366470252, now seen corresponding path program 311 times [2021-06-05 21:20:23,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:23,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381824020] [2021-06-05 21:20:23,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:23,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:23,659 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 23 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:23,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:23,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381824020] [2021-06-05 21:20:23,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381824020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:23,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905792025] [2021-06-05 21:20:23,660 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:23,686 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:20:23,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:23,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:20:23,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:23,722 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:23,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905792025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:23,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:23,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:20:23,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379731933] [2021-06-05 21:20:23,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:20:23,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:23,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:20:23,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:20:23,723 INFO L87 Difference]: Start difference. First operand 17829 states and 53046 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:23,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:23,937 INFO L93 Difference]: Finished difference Result 19008 states and 55851 transitions. [2021-06-05 21:20:23,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:20:23,937 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:20:23,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:24,025 INFO L225 Difference]: With dead ends: 19008 [2021-06-05 21:20:24,025 INFO L226 Difference]: Without dead ends: 19000 [2021-06-05 21:20:24,025 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 143.1ms TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:20:24,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19000 states. [2021-06-05 21:20:24,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19000 to 17854. [2021-06-05 21:20:24,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17854 states, 17853 states have (on average 2.975354282193469) internal successors, (53119), 17853 states have internal predecessors, (53119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:24,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17854 states to 17854 states and 53119 transitions. [2021-06-05 21:20:24,267 INFO L78 Accepts]: Start accepts. Automaton has 17854 states and 53119 transitions. Word has length 23 [2021-06-05 21:20:24,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:24,267 INFO L482 AbstractCegarLoop]: Abstraction has 17854 states and 53119 transitions. [2021-06-05 21:20:24,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:24,268 INFO L276 IsEmpty]: Start isEmpty. Operand 17854 states and 53119 transitions. [2021-06-05 21:20:24,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:20:24,280 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:24,280 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:24,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3024,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:24,481 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:24,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:24,481 INFO L82 PathProgramCache]: Analyzing trace with hash -809369392, now seen corresponding path program 312 times [2021-06-05 21:20:24,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:24,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324715906] [2021-06-05 21:20:24,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:24,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:24,561 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:24,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:24,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324715906] [2021-06-05 21:20:24,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324715906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:24,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34032569] [2021-06-05 21:20:24,561 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:24,587 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:20:24,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:24,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:20:24,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:24,622 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:24,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34032569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:24,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:24,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:20:24,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523496996] [2021-06-05 21:20:24,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:20:24,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:24,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:20:24,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:20:24,623 INFO L87 Difference]: Start difference. First operand 17854 states and 53119 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:24,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:24,849 INFO L93 Difference]: Finished difference Result 18500 states and 54560 transitions. [2021-06-05 21:20:24,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:20:24,849 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:20:24,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:24,878 INFO L225 Difference]: With dead ends: 18500 [2021-06-05 21:20:24,878 INFO L226 Difference]: Without dead ends: 18490 [2021-06-05 21:20:24,878 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 161.8ms TimeCoverageRelationStatistics Valid=257, Invalid=555, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:20:24,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18490 states. [2021-06-05 21:20:25,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18490 to 17854. [2021-06-05 21:20:25,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17854 states, 17853 states have (on average 2.9751302302134097) internal successors, (53115), 17853 states have internal predecessors, (53115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:25,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17854 states to 17854 states and 53115 transitions. [2021-06-05 21:20:25,151 INFO L78 Accepts]: Start accepts. Automaton has 17854 states and 53115 transitions. Word has length 23 [2021-06-05 21:20:25,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:25,151 INFO L482 AbstractCegarLoop]: Abstraction has 17854 states and 53115 transitions. [2021-06-05 21:20:25,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:25,152 INFO L276 IsEmpty]: Start isEmpty. Operand 17854 states and 53115 transitions. [2021-06-05 21:20:25,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:20:25,167 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:25,167 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:25,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3025,314 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:25,367 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:25,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:25,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1196093342, now seen corresponding path program 313 times [2021-06-05 21:20:25,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:25,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375620475] [2021-06-05 21:20:25,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:25,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:25,430 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 18 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:20:25,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:25,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375620475] [2021-06-05 21:20:25,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375620475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:25,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347879103] [2021-06-05 21:20:25,431 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:25,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:25,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:20:25,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:25,487 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:20:25,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347879103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:25,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:25,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-06-05 21:20:25,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323424073] [2021-06-05 21:20:25,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:20:25,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:25,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:20:25,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:20:25,488 INFO L87 Difference]: Start difference. First operand 17854 states and 53115 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:25,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:25,688 INFO L93 Difference]: Finished difference Result 18151 states and 53567 transitions. [2021-06-05 21:20:25,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:20:25,688 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:20:25,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:25,713 INFO L225 Difference]: With dead ends: 18151 [2021-06-05 21:20:25,713 INFO L226 Difference]: Without dead ends: 18139 [2021-06-05 21:20:25,713 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 120.7ms TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:20:25,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18139 states. [2021-06-05 21:20:25,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18139 to 17811. [2021-06-05 21:20:25,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17811 states, 17810 states have (on average 2.9742841100505335) internal successors, (52972), 17810 states have internal predecessors, (52972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:25,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17811 states to 17811 states and 52972 transitions. [2021-06-05 21:20:25,988 INFO L78 Accepts]: Start accepts. Automaton has 17811 states and 52972 transitions. Word has length 23 [2021-06-05 21:20:25,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:25,988 INFO L482 AbstractCegarLoop]: Abstraction has 17811 states and 52972 transitions. [2021-06-05 21:20:25,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:25,988 INFO L276 IsEmpty]: Start isEmpty. Operand 17811 states and 52972 transitions. [2021-06-05 21:20:26,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:20:26,004 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:26,004 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:26,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3026,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:26,204 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:26,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:26,205 INFO L82 PathProgramCache]: Analyzing trace with hash -102001754, now seen corresponding path program 314 times [2021-06-05 21:20:26,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:26,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281093091] [2021-06-05 21:20:26,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:26,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:26,276 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:26,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:26,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281093091] [2021-06-05 21:20:26,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281093091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:26,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860616628] [2021-06-05 21:20:26,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:26,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:20:26,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:26,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:20:26,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:26,334 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 27 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:20:26,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860616628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:26,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:26,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-06-05 21:20:26,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908336210] [2021-06-05 21:20:26,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:20:26,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:26,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:20:26,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:20:26,335 INFO L87 Difference]: Start difference. First operand 17811 states and 52972 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:26,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:26,562 INFO L93 Difference]: Finished difference Result 18119 states and 53440 transitions. [2021-06-05 21:20:26,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:20:26,562 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:20:26,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:26,583 INFO L225 Difference]: With dead ends: 18119 [2021-06-05 21:20:26,583 INFO L226 Difference]: Without dead ends: 18107 [2021-06-05 21:20:26,583 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 139.9ms TimeCoverageRelationStatistics Valid=248, Invalid=508, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:20:26,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18107 states. [2021-06-05 21:20:26,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18107 to 17779. [2021-06-05 21:20:26,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17779 states, 17778 states have (on average 2.9742940713241084) internal successors, (52877), 17778 states have internal predecessors, (52877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:26,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17779 states to 17779 states and 52877 transitions. [2021-06-05 21:20:26,943 INFO L78 Accepts]: Start accepts. Automaton has 17779 states and 52877 transitions. Word has length 23 [2021-06-05 21:20:26,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:26,943 INFO L482 AbstractCegarLoop]: Abstraction has 17779 states and 52877 transitions. [2021-06-05 21:20:26,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:26,943 INFO L276 IsEmpty]: Start isEmpty. Operand 17779 states and 52877 transitions. [2021-06-05 21:20:26,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:20:26,957 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:26,957 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:27,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3027,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:27,158 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:27,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:27,158 INFO L82 PathProgramCache]: Analyzing trace with hash -544900894, now seen corresponding path program 315 times [2021-06-05 21:20:27,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:27,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152444478] [2021-06-05 21:20:27,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:27,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:27,234 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:27,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:27,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152444478] [2021-06-05 21:20:27,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152444478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:27,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320448022] [2021-06-05 21:20:27,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:27,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:20:27,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:27,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:20:27,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:27,295 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:27,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320448022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:27,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:27,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:20:27,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407820150] [2021-06-05 21:20:27,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:20:27,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:27,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:20:27,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:20:27,296 INFO L87 Difference]: Start difference. First operand 17779 states and 52877 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:27,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:27,539 INFO L93 Difference]: Finished difference Result 18547 states and 54582 transitions. [2021-06-05 21:20:27,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:20:27,540 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:20:27,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:27,568 INFO L225 Difference]: With dead ends: 18547 [2021-06-05 21:20:27,568 INFO L226 Difference]: Without dead ends: 18532 [2021-06-05 21:20:27,568 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 167.1ms TimeCoverageRelationStatistics Valid=282, Invalid=588, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:20:27,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18532 states. [2021-06-05 21:20:27,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18532 to 17766. [2021-06-05 21:20:27,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17766 states, 17765 states have (on average 2.974838164931044) internal successors, (52848), 17765 states have internal predecessors, (52848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:27,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17766 states to 17766 states and 52848 transitions. [2021-06-05 21:20:27,818 INFO L78 Accepts]: Start accepts. Automaton has 17766 states and 52848 transitions. Word has length 23 [2021-06-05 21:20:27,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:27,818 INFO L482 AbstractCegarLoop]: Abstraction has 17766 states and 52848 transitions. [2021-06-05 21:20:27,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:27,818 INFO L276 IsEmpty]: Start isEmpty. Operand 17766 states and 52848 transitions. [2021-06-05 21:20:27,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:20:27,833 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:27,833 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:28,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3028,317 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:28,033 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:28,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:28,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1199463112, now seen corresponding path program 316 times [2021-06-05 21:20:28,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:28,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173749380] [2021-06-05 21:20:28,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:28,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:28,111 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:28,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:28,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173749380] [2021-06-05 21:20:28,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173749380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:28,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755386452] [2021-06-05 21:20:28,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:28,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:20:28,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:28,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:20:28,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:28,176 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:20:28,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755386452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:28,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:28,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-06-05 21:20:28,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129789198] [2021-06-05 21:20:28,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:20:28,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:28,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:20:28,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:20:28,177 INFO L87 Difference]: Start difference. First operand 17766 states and 52848 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:28,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:28,428 INFO L93 Difference]: Finished difference Result 18019 states and 53257 transitions. [2021-06-05 21:20:28,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:20:28,428 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:20:28,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:28,453 INFO L225 Difference]: With dead ends: 18019 [2021-06-05 21:20:28,453 INFO L226 Difference]: Without dead ends: 18009 [2021-06-05 21:20:28,454 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 164.7ms TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:20:28,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18009 states. [2021-06-05 21:20:28,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18009 to 17756. [2021-06-05 21:20:28,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17756 states, 17755 states have (on average 2.9744297381019433) internal successors, (52811), 17755 states have internal predecessors, (52811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:28,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17756 states to 17756 states and 52811 transitions. [2021-06-05 21:20:28,734 INFO L78 Accepts]: Start accepts. Automaton has 17756 states and 52811 transitions. Word has length 23 [2021-06-05 21:20:28,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:28,734 INFO L482 AbstractCegarLoop]: Abstraction has 17756 states and 52811 transitions. [2021-06-05 21:20:28,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:28,734 INFO L276 IsEmpty]: Start isEmpty. Operand 17756 states and 52811 transitions. [2021-06-05 21:20:28,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:20:28,750 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:28,750 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:28,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3029,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:28,950 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:28,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:28,951 INFO L82 PathProgramCache]: Analyzing trace with hash 334383492, now seen corresponding path program 317 times [2021-06-05 21:20:28,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:28,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910234586] [2021-06-05 21:20:28,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:28,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:29,015 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 22 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:20:29,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:29,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910234586] [2021-06-05 21:20:29,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910234586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:29,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008069839] [2021-06-05 21:20:29,015 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:29,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:20:29,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:29,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:20:29,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:29,098 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 18 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:20:29,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008069839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:29,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:29,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-06-05 21:20:29,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225726290] [2021-06-05 21:20:29,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:20:29,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:29,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:20:29,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:20:29,099 INFO L87 Difference]: Start difference. First operand 17756 states and 52811 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:29,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:29,221 INFO L93 Difference]: Finished difference Result 18147 states and 53443 transitions. [2021-06-05 21:20:29,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:20:29,221 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:20:29,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:29,249 INFO L225 Difference]: With dead ends: 18147 [2021-06-05 21:20:29,249 INFO L226 Difference]: Without dead ends: 18147 [2021-06-05 21:20:29,249 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 64.6ms TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:20:29,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18147 states. [2021-06-05 21:20:29,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18147 to 17763. [2021-06-05 21:20:29,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17763 states, 17762 states have (on average 2.9734827159103703) internal successors, (52815), 17762 states have internal predecessors, (52815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:29,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17763 states to 17763 states and 52815 transitions. [2021-06-05 21:20:29,528 INFO L78 Accepts]: Start accepts. Automaton has 17763 states and 52815 transitions. Word has length 23 [2021-06-05 21:20:29,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:29,528 INFO L482 AbstractCegarLoop]: Abstraction has 17763 states and 52815 transitions. [2021-06-05 21:20:29,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:29,528 INFO L276 IsEmpty]: Start isEmpty. Operand 17763 states and 52815 transitions. [2021-06-05 21:20:29,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:20:29,543 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:29,543 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:29,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3030 [2021-06-05 21:20:29,744 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:29,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:29,744 INFO L82 PathProgramCache]: Analyzing trace with hash -504515806, now seen corresponding path program 318 times [2021-06-05 21:20:29,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:29,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692890614] [2021-06-05 21:20:29,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:29,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:29,798 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 24 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:29,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:29,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692890614] [2021-06-05 21:20:29,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692890614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:29,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974116920] [2021-06-05 21:20:29,799 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:29,824 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:20:29,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:29,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:20:29,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:29,859 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:29,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974116920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:29,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:29,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:20:29,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914779810] [2021-06-05 21:20:29,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:20:29,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:29,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:20:29,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:20:29,860 INFO L87 Difference]: Start difference. First operand 17763 states and 52815 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:30,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:30,047 INFO L93 Difference]: Finished difference Result 18064 states and 53237 transitions. [2021-06-05 21:20:30,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:20:30,047 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:20:30,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:30,072 INFO L225 Difference]: With dead ends: 18064 [2021-06-05 21:20:30,072 INFO L226 Difference]: Without dead ends: 18059 [2021-06-05 21:20:30,072 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 106.9ms TimeCoverageRelationStatistics Valid=194, Invalid=358, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:20:30,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18059 states. [2021-06-05 21:20:30,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18059 to 17747. [2021-06-05 21:20:30,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17747 states, 17746 states have (on average 2.971599233630114) internal successors, (52734), 17746 states have internal predecessors, (52734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:30,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17747 states to 17747 states and 52734 transitions. [2021-06-05 21:20:30,369 INFO L78 Accepts]: Start accepts. Automaton has 17747 states and 52734 transitions. Word has length 23 [2021-06-05 21:20:30,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:30,369 INFO L482 AbstractCegarLoop]: Abstraction has 17747 states and 52734 transitions. [2021-06-05 21:20:30,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:30,370 INFO L276 IsEmpty]: Start isEmpty. Operand 17747 states and 52734 transitions. [2021-06-05 21:20:30,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:20:30,384 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:30,384 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:30,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3031 [2021-06-05 21:20:30,585 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:30,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:30,585 INFO L82 PathProgramCache]: Analyzing trace with hash 984889190, now seen corresponding path program 319 times [2021-06-05 21:20:30,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:30,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486063072] [2021-06-05 21:20:30,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:30,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:30,642 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:20:30,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:30,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486063072] [2021-06-05 21:20:30,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486063072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:30,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862248079] [2021-06-05 21:20:30,642 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:30,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:30,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:20:30,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:30,705 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:20:30,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862248079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:30,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:30,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-06-05 21:20:30,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702672038] [2021-06-05 21:20:30,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:20:30,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:30,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:20:30,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:20:30,706 INFO L87 Difference]: Start difference. First operand 17747 states and 52734 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:30,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:30,922 INFO L93 Difference]: Finished difference Result 18047 states and 53156 transitions. [2021-06-05 21:20:30,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:20:30,923 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:20:30,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:30,950 INFO L225 Difference]: With dead ends: 18047 [2021-06-05 21:20:30,950 INFO L226 Difference]: Without dead ends: 18039 [2021-06-05 21:20:30,950 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 120.3ms TimeCoverageRelationStatistics Valid=222, Invalid=428, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:20:30,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18039 states. [2021-06-05 21:20:31,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18039 to 17721. [2021-06-05 21:20:31,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17721 states, 17720 states have (on average 2.970316027088036) internal successors, (52634), 17720 states have internal predecessors, (52634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:31,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17721 states to 17721 states and 52634 transitions. [2021-06-05 21:20:31,232 INFO L78 Accepts]: Start accepts. Automaton has 17721 states and 52634 transitions. Word has length 23 [2021-06-05 21:20:31,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:31,232 INFO L482 AbstractCegarLoop]: Abstraction has 17721 states and 52634 transitions. [2021-06-05 21:20:31,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:31,232 INFO L276 IsEmpty]: Start isEmpty. Operand 17721 states and 52634 transitions. [2021-06-05 21:20:31,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:20:31,247 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:31,247 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:31,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3032,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:31,447 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:31,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:31,447 INFO L82 PathProgramCache]: Analyzing trace with hash -88196190, now seen corresponding path program 320 times [2021-06-05 21:20:31,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:31,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779802818] [2021-06-05 21:20:31,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:31,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:31,511 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:31,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:31,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779802818] [2021-06-05 21:20:31,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779802818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:31,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511944983] [2021-06-05 21:20:31,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:31,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:20:31,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:31,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:20:31,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:31,575 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:20:31,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511944983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:31,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:31,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-06-05 21:20:31,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352443923] [2021-06-05 21:20:31,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:20:31,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:31,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:20:31,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:20:31,576 INFO L87 Difference]: Start difference. First operand 17721 states and 52634 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:31,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:31,791 INFO L93 Difference]: Finished difference Result 18021 states and 53057 transitions. [2021-06-05 21:20:31,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:20:31,791 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:20:31,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:31,813 INFO L225 Difference]: With dead ends: 18021 [2021-06-05 21:20:31,813 INFO L226 Difference]: Without dead ends: 18012 [2021-06-05 21:20:31,814 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 136.8ms TimeCoverageRelationStatistics Valid=253, Invalid=503, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:20:31,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18012 states. [2021-06-05 21:20:32,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18012 to 17705. [2021-06-05 21:20:32,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17705 states, 17704 states have (on average 2.9697808404880255) internal successors, (52577), 17704 states have internal predecessors, (52577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:32,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17705 states to 17705 states and 52577 transitions. [2021-06-05 21:20:32,078 INFO L78 Accepts]: Start accepts. Automaton has 17705 states and 52577 transitions. Word has length 23 [2021-06-05 21:20:32,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:32,078 INFO L482 AbstractCegarLoop]: Abstraction has 17705 states and 52577 transitions. [2021-06-05 21:20:32,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:32,078 INFO L276 IsEmpty]: Start isEmpty. Operand 17705 states and 52577 transitions. [2021-06-05 21:20:32,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:20:32,093 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:32,093 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:32,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3033 [2021-06-05 21:20:32,293 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:32,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:32,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1005895398, now seen corresponding path program 321 times [2021-06-05 21:20:32,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:32,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402533153] [2021-06-05 21:20:32,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:32,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:32,362 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 22 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:20:32,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:32,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402533153] [2021-06-05 21:20:32,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402533153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:32,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078047477] [2021-06-05 21:20:32,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:32,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:20:32,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:32,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:20:32,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:32,429 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 24 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:20:32,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078047477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:32,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:32,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:20:32,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128373235] [2021-06-05 21:20:32,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:20:32,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:32,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:20:32,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:20:32,430 INFO L87 Difference]: Start difference. First operand 17705 states and 52577 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:32,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:32,636 INFO L93 Difference]: Finished difference Result 19443 states and 56893 transitions. [2021-06-05 21:20:32,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:20:32,636 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:20:32,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:32,657 INFO L225 Difference]: With dead ends: 19443 [2021-06-05 21:20:32,657 INFO L226 Difference]: Without dead ends: 19435 [2021-06-05 21:20:32,658 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 144.2ms TimeCoverageRelationStatistics Valid=243, Invalid=513, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:20:32,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19435 states. [2021-06-05 21:20:32,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19435 to 17759. [2021-06-05 21:20:32,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17759 states, 17758 states have (on average 2.968802793107332) internal successors, (52720), 17758 states have internal predecessors, (52720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:32,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17759 states to 17759 states and 52720 transitions. [2021-06-05 21:20:32,916 INFO L78 Accepts]: Start accepts. Automaton has 17759 states and 52720 transitions. Word has length 23 [2021-06-05 21:20:32,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:32,916 INFO L482 AbstractCegarLoop]: Abstraction has 17759 states and 52720 transitions. [2021-06-05 21:20:32,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:32,916 INFO L276 IsEmpty]: Start isEmpty. Operand 17759 states and 52720 transitions. [2021-06-05 21:20:32,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:20:32,930 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:32,930 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:33,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 323 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3034 [2021-06-05 21:20:33,130 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:33,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:33,131 INFO L82 PathProgramCache]: Analyzing trace with hash 562996258, now seen corresponding path program 322 times [2021-06-05 21:20:33,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:33,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856587692] [2021-06-05 21:20:33,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:33,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:33,232 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:33,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:33,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856587692] [2021-06-05 21:20:33,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856587692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:33,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318681582] [2021-06-05 21:20:33,233 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:33,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:20:33,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:33,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:20:33,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:33,384 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:20:33,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318681582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:33,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:33,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-06-05 21:20:33,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532209946] [2021-06-05 21:20:33,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:20:33,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:33,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:20:33,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:20:33,385 INFO L87 Difference]: Start difference. First operand 17759 states and 52720 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:33,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:33,619 INFO L93 Difference]: Finished difference Result 19462 states and 56909 transitions. [2021-06-05 21:20:33,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:20:33,620 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:20:33,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:33,645 INFO L225 Difference]: With dead ends: 19462 [2021-06-05 21:20:33,645 INFO L226 Difference]: Without dead ends: 19452 [2021-06-05 21:20:33,645 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 178.9ms TimeCoverageRelationStatistics Valid=278, Invalid=592, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:20:33,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19452 states. [2021-06-05 21:20:33,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19452 to 17815. [2021-06-05 21:20:33,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17815 states, 17814 states have (on average 2.967778152015269) internal successors, (52868), 17814 states have internal predecessors, (52868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:33,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17815 states to 17815 states and 52868 transitions. [2021-06-05 21:20:33,889 INFO L78 Accepts]: Start accepts. Automaton has 17815 states and 52868 transitions. Word has length 23 [2021-06-05 21:20:33,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:33,889 INFO L482 AbstractCegarLoop]: Abstraction has 17815 states and 52868 transitions. [2021-06-05 21:20:33,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:33,889 INFO L276 IsEmpty]: Start isEmpty. Operand 17815 states and 52868 transitions. [2021-06-05 21:20:33,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:20:33,903 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:33,903 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:34,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3035,324 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:34,103 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:34,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:34,104 INFO L82 PathProgramCache]: Analyzing trace with hash -281975194, now seen corresponding path program 323 times [2021-06-05 21:20:34,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:34,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514220127] [2021-06-05 21:20:34,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:34,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:34,183 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:34,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:34,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514220127] [2021-06-05 21:20:34,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514220127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:34,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661492797] [2021-06-05 21:20:34,183 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:34,208 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:20:34,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:34,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:20:34,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:34,249 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:20:34,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661492797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:34,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:34,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-06-05 21:20:34,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612889340] [2021-06-05 21:20:34,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:20:34,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:34,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:20:34,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:20:34,249 INFO L87 Difference]: Start difference. First operand 17815 states and 52868 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:34,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:34,518 INFO L93 Difference]: Finished difference Result 18858 states and 55259 transitions. [2021-06-05 21:20:34,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:20:34,518 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:20:34,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:34,539 INFO L225 Difference]: With dead ends: 18858 [2021-06-05 21:20:34,539 INFO L226 Difference]: Without dead ends: 18846 [2021-06-05 21:20:34,539 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 196.3ms TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:20:34,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18846 states. [2021-06-05 21:20:34,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18846 to 17815. [2021-06-05 21:20:34,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17815 states, 17814 states have (on average 2.967497473896935) internal successors, (52863), 17814 states have internal predecessors, (52863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:34,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17815 states to 17815 states and 52863 transitions. [2021-06-05 21:20:34,780 INFO L78 Accepts]: Start accepts. Automaton has 17815 states and 52863 transitions. Word has length 23 [2021-06-05 21:20:34,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:34,780 INFO L482 AbstractCegarLoop]: Abstraction has 17815 states and 52863 transitions. [2021-06-05 21:20:34,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:34,780 INFO L276 IsEmpty]: Start isEmpty. Operand 17815 states and 52863 transitions. [2021-06-05 21:20:34,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:20:34,794 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:34,794 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:34,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3036,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:34,994 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:34,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:34,995 INFO L82 PathProgramCache]: Analyzing trace with hash 614484244, now seen corresponding path program 324 times [2021-06-05 21:20:34,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:34,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917876896] [2021-06-05 21:20:34,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:34,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:35,076 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:20:35,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:35,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917876896] [2021-06-05 21:20:35,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917876896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:35,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421537724] [2021-06-05 21:20:35,077 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:35,101 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:20:35,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:35,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:20:35,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:35,142 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 22 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:20:35,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421537724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:35,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:35,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:20:35,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101348282] [2021-06-05 21:20:35,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:20:35,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:35,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:20:35,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:20:35,143 INFO L87 Difference]: Start difference. First operand 17815 states and 52863 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:35,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:35,358 INFO L93 Difference]: Finished difference Result 18134 states and 53387 transitions. [2021-06-05 21:20:35,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:20:35,358 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:20:35,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:35,380 INFO L225 Difference]: With dead ends: 18134 [2021-06-05 21:20:35,380 INFO L226 Difference]: Without dead ends: 18122 [2021-06-05 21:20:35,380 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 141.1ms TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:20:35,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18122 states. [2021-06-05 21:20:35,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18122 to 17754. [2021-06-05 21:20:35,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17754 states, 17753 states have (on average 2.9667661803638823) internal successors, (52669), 17753 states have internal predecessors, (52669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:35,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17754 states to 17754 states and 52669 transitions. [2021-06-05 21:20:35,649 INFO L78 Accepts]: Start accepts. Automaton has 17754 states and 52669 transitions. Word has length 23 [2021-06-05 21:20:35,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:35,649 INFO L482 AbstractCegarLoop]: Abstraction has 17754 states and 52669 transitions. [2021-06-05 21:20:35,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:35,649 INFO L276 IsEmpty]: Start isEmpty. Operand 17754 states and 52669 transitions. [2021-06-05 21:20:35,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:20:35,664 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:35,664 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:35,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3037 [2021-06-05 21:20:35,865 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:35,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:35,865 INFO L82 PathProgramCache]: Analyzing trace with hash 171585104, now seen corresponding path program 325 times [2021-06-05 21:20:35,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:35,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920213188] [2021-06-05 21:20:35,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:35,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:35,952 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:35,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:35,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920213188] [2021-06-05 21:20:35,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920213188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:35,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976357813] [2021-06-05 21:20:35,953 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:35,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:35,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:20:35,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:36,011 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:20:36,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976357813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:36,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:36,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-06-05 21:20:36,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581452815] [2021-06-05 21:20:36,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:20:36,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:36,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:20:36,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:20:36,012 INFO L87 Difference]: Start difference. First operand 17754 states and 52669 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:36,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:36,252 INFO L93 Difference]: Finished difference Result 18086 states and 53214 transitions. [2021-06-05 21:20:36,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:20:36,253 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:20:36,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:36,279 INFO L225 Difference]: With dead ends: 18086 [2021-06-05 21:20:36,279 INFO L226 Difference]: Without dead ends: 18076 [2021-06-05 21:20:36,279 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 159.7ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:20:36,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18076 states. [2021-06-05 21:20:36,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18076 to 17750. [2021-06-05 21:20:36,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17750 states, 17749 states have (on average 2.966476984618852) internal successors, (52652), 17749 states have internal predecessors, (52652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:36,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17750 states to 17750 states and 52652 transitions. [2021-06-05 21:20:36,570 INFO L78 Accepts]: Start accepts. Automaton has 17750 states and 52652 transitions. Word has length 23 [2021-06-05 21:20:36,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:36,570 INFO L482 AbstractCegarLoop]: Abstraction has 17750 states and 52652 transitions. [2021-06-05 21:20:36,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:36,570 INFO L276 IsEmpty]: Start isEmpty. Operand 17750 states and 52652 transitions. [2021-06-05 21:20:36,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:20:36,583 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:36,583 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:36,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3038,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:36,783 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:36,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:36,784 INFO L82 PathProgramCache]: Analyzing trace with hash -673386348, now seen corresponding path program 326 times [2021-06-05 21:20:36,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:36,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162285618] [2021-06-05 21:20:36,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:36,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:36,915 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:36,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:36,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162285618] [2021-06-05 21:20:36,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162285618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:36,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970390808] [2021-06-05 21:20:36,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:36,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:20:36,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:36,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:20:36,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:36,990 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:20:36,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970390808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:36,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:36,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-06-05 21:20:36,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640988605] [2021-06-05 21:20:36,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:20:36,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:36,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:20:36,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:20:36,991 INFO L87 Difference]: Start difference. First operand 17750 states and 52652 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:37,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:37,279 INFO L93 Difference]: Finished difference Result 18572 states and 54522 transitions. [2021-06-05 21:20:37,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:20:37,279 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:20:37,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:37,308 INFO L225 Difference]: With dead ends: 18572 [2021-06-05 21:20:37,308 INFO L226 Difference]: Without dead ends: 18560 [2021-06-05 21:20:37,308 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 237.3ms TimeCoverageRelationStatistics Valid=315, Invalid=677, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:20:37,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18560 states. [2021-06-05 21:20:37,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18560 to 17743. [2021-06-05 21:20:37,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17743 states, 17742 states have (on average 2.966463758313606) internal successors, (52631), 17742 states have internal predecessors, (52631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:37,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17743 states to 17743 states and 52631 transitions. [2021-06-05 21:20:37,563 INFO L78 Accepts]: Start accepts. Automaton has 17743 states and 52631 transitions. Word has length 23 [2021-06-05 21:20:37,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:37,563 INFO L482 AbstractCegarLoop]: Abstraction has 17743 states and 52631 transitions. [2021-06-05 21:20:37,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:37,563 INFO L276 IsEmpty]: Start isEmpty. Operand 17743 states and 52631 transitions. [2021-06-05 21:20:37,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:20:37,576 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:37,577 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:37,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3039,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:37,777 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:37,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:37,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1862290286, now seen corresponding path program 327 times [2021-06-05 21:20:37,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:37,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937033986] [2021-06-05 21:20:37,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:37,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:37,865 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:37,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:37,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937033986] [2021-06-05 21:20:37,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937033986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:37,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279045640] [2021-06-05 21:20:37,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:37,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:20:37,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:37,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:20:37,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:37,926 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:37,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279045640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:37,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:37,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 21:20:37,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764107065] [2021-06-05 21:20:37,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:20:37,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:37,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:20:37,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:20:37,927 INFO L87 Difference]: Start difference. First operand 17743 states and 52631 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:38,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:38,153 INFO L93 Difference]: Finished difference Result 19073 states and 55761 transitions. [2021-06-05 21:20:38,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:20:38,153 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:20:38,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:38,180 INFO L225 Difference]: With dead ends: 19073 [2021-06-05 21:20:38,180 INFO L226 Difference]: Without dead ends: 19061 [2021-06-05 21:20:38,181 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 165.5ms TimeCoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:20:38,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19061 states. [2021-06-05 21:20:38,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19061 to 17743. [2021-06-05 21:20:38,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17743 states, 17742 states have (on average 2.966294668019389) internal successors, (52628), 17742 states have internal predecessors, (52628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:38,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17743 states to 17743 states and 52628 transitions. [2021-06-05 21:20:38,452 INFO L78 Accepts]: Start accepts. Automaton has 17743 states and 52628 transitions. Word has length 23 [2021-06-05 21:20:38,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:38,452 INFO L482 AbstractCegarLoop]: Abstraction has 17743 states and 52628 transitions. [2021-06-05 21:20:38,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:38,452 INFO L276 IsEmpty]: Start isEmpty. Operand 17743 states and 52628 transitions. [2021-06-05 21:20:38,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:20:38,467 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:38,467 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:38,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3040 [2021-06-05 21:20:38,668 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:38,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:38,668 INFO L82 PathProgramCache]: Analyzing trace with hash -71954318, now seen corresponding path program 328 times [2021-06-05 21:20:38,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:38,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761882402] [2021-06-05 21:20:38,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:38,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:38,720 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:20:38,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:38,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761882402] [2021-06-05 21:20:38,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761882402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:38,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016178387] [2021-06-05 21:20:38,720 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:38,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:20:38,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:38,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:20:38,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:38,785 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 30 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:20:38,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016178387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:38,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:38,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 21:20:38,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786826357] [2021-06-05 21:20:38,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:20:38,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:38,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:20:38,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:20:38,785 INFO L87 Difference]: Start difference. First operand 17743 states and 52628 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:38,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:38,892 INFO L93 Difference]: Finished difference Result 18066 states and 53107 transitions. [2021-06-05 21:20:38,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:20:38,892 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:20:38,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:38,918 INFO L225 Difference]: With dead ends: 18066 [2021-06-05 21:20:38,918 INFO L226 Difference]: Without dead ends: 18064 [2021-06-05 21:20:38,918 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 52.5ms TimeCoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:20:38,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18064 states. [2021-06-05 21:20:39,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18064 to 17735. [2021-06-05 21:20:39,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17735 states, 17734 states have (on average 2.966110296605391) internal successors, (52601), 17734 states have internal predecessors, (52601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:39,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17735 states to 17735 states and 52601 transitions. [2021-06-05 21:20:39,197 INFO L78 Accepts]: Start accepts. Automaton has 17735 states and 52601 transitions. Word has length 23 [2021-06-05 21:20:39,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:39,197 INFO L482 AbstractCegarLoop]: Abstraction has 17735 states and 52601 transitions. [2021-06-05 21:20:39,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:39,197 INFO L276 IsEmpty]: Start isEmpty. Operand 17735 states and 52601 transitions. [2021-06-05 21:20:39,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:20:39,212 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:39,212 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:39,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3041 [2021-06-05 21:20:39,412 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:39,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:39,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1673500372, now seen corresponding path program 329 times [2021-06-05 21:20:39,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:39,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694804562] [2021-06-05 21:20:39,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:39,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:39,464 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:39,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:39,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694804562] [2021-06-05 21:20:39,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694804562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:39,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976259744] [2021-06-05 21:20:39,464 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:39,489 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:20:39,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:39,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:20:39,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:39,529 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 40 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:20:39,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976259744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:39,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:39,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-06-05 21:20:39,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745886790] [2021-06-05 21:20:39,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:20:39,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:39,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:20:39,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:20:39,529 INFO L87 Difference]: Start difference. First operand 17735 states and 52601 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:39,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:39,690 INFO L93 Difference]: Finished difference Result 18041 states and 53023 transitions. [2021-06-05 21:20:39,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:20:39,691 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:20:39,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:39,715 INFO L225 Difference]: With dead ends: 18041 [2021-06-05 21:20:39,716 INFO L226 Difference]: Without dead ends: 18041 [2021-06-05 21:20:39,716 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 58.0ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:20:39,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18041 states. [2021-06-05 21:20:39,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18041 to 17719. [2021-06-05 21:20:39,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17719 states, 17718 states have (on average 2.9652895360650184) internal successors, (52539), 17718 states have internal predecessors, (52539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:39,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17719 states to 17719 states and 52539 transitions. [2021-06-05 21:20:39,979 INFO L78 Accepts]: Start accepts. Automaton has 17719 states and 52539 transitions. Word has length 23 [2021-06-05 21:20:39,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:39,979 INFO L482 AbstractCegarLoop]: Abstraction has 17719 states and 52539 transitions. [2021-06-05 21:20:39,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:39,979 INFO L276 IsEmpty]: Start isEmpty. Operand 17719 states and 52539 transitions. [2021-06-05 21:20:39,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:20:39,992 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:39,992 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:40,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3042 [2021-06-05 21:20:40,193 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:40,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:40,193 INFO L82 PathProgramCache]: Analyzing trace with hash -910853616, now seen corresponding path program 330 times [2021-06-05 21:20:40,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:40,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461994837] [2021-06-05 21:20:40,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:40,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:40,249 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:20:40,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:40,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461994837] [2021-06-05 21:20:40,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461994837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:40,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238037643] [2021-06-05 21:20:40,250 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:40,281 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:20:40,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:40,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:20:40,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:40,316 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:20:40,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238037643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:40,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:40,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:20:40,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336856344] [2021-06-05 21:20:40,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:20:40,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:40,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:20:40,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:20:40,317 INFO L87 Difference]: Start difference. First operand 17719 states and 52539 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:40,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:40,505 INFO L93 Difference]: Finished difference Result 18030 states and 52973 transitions. [2021-06-05 21:20:40,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:20:40,505 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:20:40,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:40,531 INFO L225 Difference]: With dead ends: 18030 [2021-06-05 21:20:40,531 INFO L226 Difference]: Without dead ends: 18027 [2021-06-05 21:20:40,531 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 107.7ms TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:20:40,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18027 states. [2021-06-05 21:20:40,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18027 to 17710. [2021-06-05 21:20:40,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17710 states, 17709 states have (on average 2.963973121011915) internal successors, (52489), 17709 states have internal predecessors, (52489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:40,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17710 states to 17710 states and 52489 transitions. [2021-06-05 21:20:40,795 INFO L78 Accepts]: Start accepts. Automaton has 17710 states and 52489 transitions. Word has length 23 [2021-06-05 21:20:40,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:40,795 INFO L482 AbstractCegarLoop]: Abstraction has 17710 states and 52489 transitions. [2021-06-05 21:20:40,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:40,795 INFO L276 IsEmpty]: Start isEmpty. Operand 17710 states and 52489 transitions. [2021-06-05 21:20:40,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:20:40,807 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:40,807 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:41,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3043 [2021-06-05 21:20:41,008 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:41,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:41,008 INFO L82 PathProgramCache]: Analyzing trace with hash 578551380, now seen corresponding path program 331 times [2021-06-05 21:20:41,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:41,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606632170] [2021-06-05 21:20:41,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:41,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:41,072 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:41,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:41,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606632170] [2021-06-05 21:20:41,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606632170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:41,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867519588] [2021-06-05 21:20:41,073 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:41,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:41,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:20:41,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:41,134 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:20:41,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867519588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:41,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:41,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-06-05 21:20:41,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67558231] [2021-06-05 21:20:41,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:20:41,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:41,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:20:41,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:20:41,135 INFO L87 Difference]: Start difference. First operand 17710 states and 52489 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:41,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:41,345 INFO L93 Difference]: Finished difference Result 18025 states and 52930 transitions. [2021-06-05 21:20:41,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:20:41,345 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:20:41,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:41,369 INFO L225 Difference]: With dead ends: 18025 [2021-06-05 21:20:41,369 INFO L226 Difference]: Without dead ends: 18021 [2021-06-05 21:20:41,369 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 122.8ms TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:20:41,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18021 states. [2021-06-05 21:20:41,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18021 to 17710. [2021-06-05 21:20:41,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17710 states, 17709 states have (on average 2.9626178779151844) internal successors, (52465), 17709 states have internal predecessors, (52465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:41,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17710 states to 17710 states and 52465 transitions. [2021-06-05 21:20:41,635 INFO L78 Accepts]: Start accepts. Automaton has 17710 states and 52465 transitions. Word has length 23 [2021-06-05 21:20:41,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:41,635 INFO L482 AbstractCegarLoop]: Abstraction has 17710 states and 52465 transitions. [2021-06-05 21:20:41,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:41,635 INFO L276 IsEmpty]: Start isEmpty. Operand 17710 states and 52465 transitions. [2021-06-05 21:20:41,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:20:41,648 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:41,648 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:41,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3044 [2021-06-05 21:20:41,849 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:41,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:41,849 INFO L82 PathProgramCache]: Analyzing trace with hash -494534000, now seen corresponding path program 332 times [2021-06-05 21:20:41,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:41,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292522291] [2021-06-05 21:20:41,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:41,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:41,918 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 23 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:20:41,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:41,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292522291] [2021-06-05 21:20:41,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292522291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:41,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684564986] [2021-06-05 21:20:41,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:41,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:20:41,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:41,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:20:41,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:41,974 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:20:41,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684564986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:41,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:41,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-06-05 21:20:41,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668228125] [2021-06-05 21:20:41,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:20:41,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:41,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:20:41,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:20:41,975 INFO L87 Difference]: Start difference. First operand 17710 states and 52465 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:42,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:42,169 INFO L93 Difference]: Finished difference Result 20107 states and 58655 transitions. [2021-06-05 21:20:42,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:20:42,169 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:20:42,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:42,197 INFO L225 Difference]: With dead ends: 20107 [2021-06-05 21:20:42,198 INFO L226 Difference]: Without dead ends: 20101 [2021-06-05 21:20:42,198 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 122.2ms TimeCoverageRelationStatistics Valid=197, Invalid=403, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:20:42,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20101 states. [2021-06-05 21:20:42,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20101 to 17710. [2021-06-05 21:20:42,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17710 states, 17709 states have (on average 2.962222598678638) internal successors, (52458), 17709 states have internal predecessors, (52458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:42,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17710 states to 17710 states and 52458 transitions. [2021-06-05 21:20:42,569 INFO L78 Accepts]: Start accepts. Automaton has 17710 states and 52458 transitions. Word has length 23 [2021-06-05 21:20:42,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:42,569 INFO L482 AbstractCegarLoop]: Abstraction has 17710 states and 52458 transitions. [2021-06-05 21:20:42,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:42,569 INFO L276 IsEmpty]: Start isEmpty. Operand 17710 states and 52458 transitions. [2021-06-05 21:20:42,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:20:42,584 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:42,584 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:42,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 334 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3045 [2021-06-05 21:20:42,784 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:42,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:42,785 INFO L82 PathProgramCache]: Analyzing trace with hash 599557588, now seen corresponding path program 333 times [2021-06-05 21:20:42,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:42,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900147070] [2021-06-05 21:20:42,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:42,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:42,859 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 24 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:42,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:42,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900147070] [2021-06-05 21:20:42,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900147070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:42,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809367995] [2021-06-05 21:20:42,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:42,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:20:42,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:42,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:20:42,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:42,921 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:42,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809367995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:42,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:42,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:20:42,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403514414] [2021-06-05 21:20:42,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:20:42,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:42,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:20:42,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:20:42,922 INFO L87 Difference]: Start difference. First operand 17710 states and 52458 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:43,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:43,127 INFO L93 Difference]: Finished difference Result 20128 states and 58673 transitions. [2021-06-05 21:20:43,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:20:43,128 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:20:43,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:43,156 INFO L225 Difference]: With dead ends: 20128 [2021-06-05 21:20:43,156 INFO L226 Difference]: Without dead ends: 20120 [2021-06-05 21:20:43,156 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 138.8ms TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:20:43,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20120 states. [2021-06-05 21:20:43,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20120 to 17811. [2021-06-05 21:20:43,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17811 states, 17810 states have (on average 2.9632229084783828) internal successors, (52775), 17810 states have internal predecessors, (52775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:43,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17811 states to 17811 states and 52775 transitions. [2021-06-05 21:20:43,433 INFO L78 Accepts]: Start accepts. Automaton has 17811 states and 52775 transitions. Word has length 23 [2021-06-05 21:20:43,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:43,433 INFO L482 AbstractCegarLoop]: Abstraction has 17811 states and 52775 transitions. [2021-06-05 21:20:43,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:43,433 INFO L276 IsEmpty]: Start isEmpty. Operand 17811 states and 52775 transitions. [2021-06-05 21:20:43,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:20:43,447 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:43,447 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:43,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3046,335 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:43,648 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:43,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:43,648 INFO L82 PathProgramCache]: Analyzing trace with hash 156658448, now seen corresponding path program 334 times [2021-06-05 21:20:43,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:43,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101984589] [2021-06-05 21:20:43,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:43,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:43,727 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:20:43,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:43,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101984589] [2021-06-05 21:20:43,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101984589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:43,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127456464] [2021-06-05 21:20:43,728 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:43,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:20:43,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:43,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:20:43,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:43,786 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 30 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:20:43,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127456464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:43,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:43,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-06-05 21:20:43,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80689873] [2021-06-05 21:20:43,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:20:43,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:43,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:20:43,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:20:43,787 INFO L87 Difference]: Start difference. First operand 17811 states and 52775 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:43,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:43,997 INFO L93 Difference]: Finished difference Result 19877 states and 57902 transitions. [2021-06-05 21:20:43,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:20:43,997 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:20:43,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:44,020 INFO L225 Difference]: With dead ends: 19877 [2021-06-05 21:20:44,020 INFO L226 Difference]: Without dead ends: 19867 [2021-06-05 21:20:44,021 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 162.6ms TimeCoverageRelationStatistics Valid=259, Invalid=553, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:20:44,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19867 states. [2021-06-05 21:20:44,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19867 to 17811. [2021-06-05 21:20:44,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17811 states, 17810 states have (on average 2.963054463784391) internal successors, (52772), 17810 states have internal predecessors, (52772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:44,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17811 states to 17811 states and 52772 transitions. [2021-06-05 21:20:44,283 INFO L78 Accepts]: Start accepts. Automaton has 17811 states and 52772 transitions. Word has length 23 [2021-06-05 21:20:44,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:44,283 INFO L482 AbstractCegarLoop]: Abstraction has 17811 states and 52772 transitions. [2021-06-05 21:20:44,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:44,283 INFO L276 IsEmpty]: Start isEmpty. Operand 17811 states and 52772 transitions. [2021-06-05 21:20:44,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:20:44,298 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:44,298 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:44,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3047,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:44,498 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:44,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:44,498 INFO L82 PathProgramCache]: Analyzing trace with hash -688313004, now seen corresponding path program 335 times [2021-06-05 21:20:44,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:44,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007069700] [2021-06-05 21:20:44,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:44,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:44,587 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:44,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:44,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007069700] [2021-06-05 21:20:44,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007069700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:44,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182081970] [2021-06-05 21:20:44,587 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:44,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:20:44,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:44,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:20:44,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:44,650 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:44,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182081970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:44,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:44,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 21:20:44,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118361652] [2021-06-05 21:20:44,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:20:44,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:44,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:20:44,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:20:44,650 INFO L87 Difference]: Start difference. First operand 17811 states and 52772 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:44,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:44,896 INFO L93 Difference]: Finished difference Result 19900 states and 57925 transitions. [2021-06-05 21:20:44,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:20:44,897 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:20:44,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:44,922 INFO L225 Difference]: With dead ends: 19900 [2021-06-05 21:20:44,922 INFO L226 Difference]: Without dead ends: 19888 [2021-06-05 21:20:44,922 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 183.0ms TimeCoverageRelationStatistics Valid=297, Invalid=633, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:20:44,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19888 states. [2021-06-05 21:20:45,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19888 to 17820. [2021-06-05 21:20:45,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17820 states, 17819 states have (on average 2.9629047645771367) internal successors, (52796), 17819 states have internal predecessors, (52796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:45,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17820 states to 17820 states and 52796 transitions. [2021-06-05 21:20:45,193 INFO L78 Accepts]: Start accepts. Automaton has 17820 states and 52796 transitions. Word has length 23 [2021-06-05 21:20:45,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:45,193 INFO L482 AbstractCegarLoop]: Abstraction has 17820 states and 52796 transitions. [2021-06-05 21:20:45,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:45,193 INFO L276 IsEmpty]: Start isEmpty. Operand 17820 states and 52796 transitions. [2021-06-05 21:20:45,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:20:45,208 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:45,208 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:45,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3048,337 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:45,409 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:45,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:45,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1112624240, now seen corresponding path program 336 times [2021-06-05 21:20:45,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:45,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795063937] [2021-06-05 21:20:45,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:45,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:45,500 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:45,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:45,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795063937] [2021-06-05 21:20:45,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795063937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:45,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671287767] [2021-06-05 21:20:45,501 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:45,526 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:20:45,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:45,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:20:45,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:45,562 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 39 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:45,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671287767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:45,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:45,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 21:20:45,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752438103] [2021-06-05 21:20:45,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:20:45,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:45,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:20:45,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:20:45,563 INFO L87 Difference]: Start difference. First operand 17820 states and 52796 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:45,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:45,918 INFO L93 Difference]: Finished difference Result 18844 states and 55132 transitions. [2021-06-05 21:20:45,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:20:45,918 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:20:45,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:45,945 INFO L225 Difference]: With dead ends: 18844 [2021-06-05 21:20:45,945 INFO L226 Difference]: Without dead ends: 18830 [2021-06-05 21:20:45,945 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 286.7ms TimeCoverageRelationStatistics Valid=384, Invalid=806, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:20:45,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18830 states. [2021-06-05 21:20:46,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18830 to 17820. [2021-06-05 21:20:46,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17820 states, 17819 states have (on average 2.9627925248330436) internal successors, (52794), 17819 states have internal predecessors, (52794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:46,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17820 states to 17820 states and 52794 transitions. [2021-06-05 21:20:46,254 INFO L78 Accepts]: Start accepts. Automaton has 17820 states and 52794 transitions. Word has length 23 [2021-06-05 21:20:46,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:46,254 INFO L482 AbstractCegarLoop]: Abstraction has 17820 states and 52794 transitions. [2021-06-05 21:20:46,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:46,254 INFO L276 IsEmpty]: Start isEmpty. Operand 17820 states and 52794 transitions. [2021-06-05 21:20:46,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:20:46,270 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:46,270 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:46,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3049 [2021-06-05 21:20:46,470 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:46,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:46,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1769822746, now seen corresponding path program 337 times [2021-06-05 21:20:46,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:46,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372731528] [2021-06-05 21:20:46,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:46,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:46,555 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:46,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:46,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372731528] [2021-06-05 21:20:46,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372731528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:46,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462158276] [2021-06-05 21:20:46,555 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:46,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:46,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:20:46,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:46,625 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 43 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:20:46,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462158276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:46,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:46,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:20:46,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130987888] [2021-06-05 21:20:46,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:20:46,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:46,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:20:46,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:20:46,626 INFO L87 Difference]: Start difference. First operand 17820 states and 52794 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:46,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:46,836 INFO L93 Difference]: Finished difference Result 17961 states and 52999 transitions. [2021-06-05 21:20:46,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:20:46,836 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:20:46,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:46,861 INFO L225 Difference]: With dead ends: 17961 [2021-06-05 21:20:46,862 INFO L226 Difference]: Without dead ends: 17955 [2021-06-05 21:20:46,862 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 146.3ms TimeCoverageRelationStatistics Valid=223, Invalid=427, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:20:46,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17955 states. [2021-06-05 21:20:47,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17955 to 17760. [2021-06-05 21:20:47,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17760 states, 17759 states have (on average 2.962160031533307) internal successors, (52605), 17759 states have internal predecessors, (52605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:47,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17760 states to 17760 states and 52605 transitions. [2021-06-05 21:20:47,124 INFO L78 Accepts]: Start accepts. Automaton has 17760 states and 52605 transitions. Word has length 23 [2021-06-05 21:20:47,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:47,124 INFO L482 AbstractCegarLoop]: Abstraction has 17760 states and 52605 transitions. [2021-06-05 21:20:47,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:47,124 INFO L276 IsEmpty]: Start isEmpty. Operand 17760 states and 52605 transitions. [2021-06-05 21:20:47,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:20:47,140 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:47,140 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:47,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3050 [2021-06-05 21:20:47,341 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:47,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:47,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1074657958, now seen corresponding path program 338 times [2021-06-05 21:20:47,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:47,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239680646] [2021-06-05 21:20:47,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:47,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:47,427 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:47,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:47,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239680646] [2021-06-05 21:20:47,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239680646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:47,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735841068] [2021-06-05 21:20:47,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:47,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:20:47,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:47,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:20:47,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:47,485 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 33 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:20:47,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735841068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:47,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:47,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-06-05 21:20:47,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478823649] [2021-06-05 21:20:47,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:20:47,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:47,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:20:47,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:20:47,485 INFO L87 Difference]: Start difference. First operand 17760 states and 52605 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:47,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:47,700 INFO L93 Difference]: Finished difference Result 18138 states and 53420 transitions. [2021-06-05 21:20:47,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:20:47,700 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:20:47,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:47,725 INFO L225 Difference]: With dead ends: 18138 [2021-06-05 21:20:47,725 INFO L226 Difference]: Without dead ends: 18126 [2021-06-05 21:20:47,726 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 160.4ms TimeCoverageRelationStatistics Valid=259, Invalid=553, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:20:47,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18126 states. [2021-06-05 21:20:47,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18126 to 17755. [2021-06-05 21:20:47,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17755 states, 17754 states have (on average 2.9613608200968797) internal successors, (52576), 17754 states have internal predecessors, (52576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:47,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17755 states to 17755 states and 52576 transitions. [2021-06-05 21:20:47,985 INFO L78 Accepts]: Start accepts. Automaton has 17755 states and 52576 transitions. Word has length 23 [2021-06-05 21:20:47,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:47,985 INFO L482 AbstractCegarLoop]: Abstraction has 17755 states and 52576 transitions. [2021-06-05 21:20:47,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:47,985 INFO L276 IsEmpty]: Start isEmpty. Operand 17755 states and 52576 transitions. [2021-06-05 21:20:47,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:20:48,000 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:48,000 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:48,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3051 [2021-06-05 21:20:48,200 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:48,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:48,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1282166328, now seen corresponding path program 339 times [2021-06-05 21:20:48,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:48,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111891417] [2021-06-05 21:20:48,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:48,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:48,276 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 23 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:20:48,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:48,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111891417] [2021-06-05 21:20:48,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111891417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:48,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718993995] [2021-06-05 21:20:48,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:48,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:20:48,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:48,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:20:48,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:48,339 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 23 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:20:48,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718993995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:48,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:48,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:20:48,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69824075] [2021-06-05 21:20:48,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:20:48,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:48,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:20:48,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:20:48,340 INFO L87 Difference]: Start difference. First operand 17755 states and 52576 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:48,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:48,531 INFO L93 Difference]: Finished difference Result 18122 states and 53190 transitions. [2021-06-05 21:20:48,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:20:48,531 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:20:48,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:48,555 INFO L225 Difference]: With dead ends: 18122 [2021-06-05 21:20:48,555 INFO L226 Difference]: Without dead ends: 18113 [2021-06-05 21:20:48,556 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 125.4ms TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:20:48,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18113 states. [2021-06-05 21:20:48,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18113 to 17738. [2021-06-05 21:20:48,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17738 states, 17737 states have (on average 2.960139820713762) internal successors, (52504), 17737 states have internal predecessors, (52504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:48,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17738 states to 17738 states and 52504 transitions. [2021-06-05 21:20:48,835 INFO L78 Accepts]: Start accepts. Automaton has 17738 states and 52504 transitions. Word has length 23 [2021-06-05 21:20:48,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:48,835 INFO L482 AbstractCegarLoop]: Abstraction has 17738 states and 52504 transitions. [2021-06-05 21:20:48,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:48,835 INFO L276 IsEmpty]: Start isEmpty. Operand 17738 states and 52504 transitions. [2021-06-05 21:20:48,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:20:48,851 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:48,851 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:49,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3052 [2021-06-05 21:20:49,051 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:49,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:49,051 INFO L82 PathProgramCache]: Analyzing trace with hash -188074740, now seen corresponding path program 340 times [2021-06-05 21:20:49,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:49,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291755910] [2021-06-05 21:20:49,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:49,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:49,126 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 24 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:49,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:49,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291755910] [2021-06-05 21:20:49,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291755910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:49,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527548780] [2021-06-05 21:20:49,126 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:49,151 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:20:49,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:49,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:20:49,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:49,186 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:20:49,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527548780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:49,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:49,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-06-05 21:20:49,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382867616] [2021-06-05 21:20:49,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:20:49,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:49,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:20:49,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:20:49,187 INFO L87 Difference]: Start difference. First operand 17738 states and 52504 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:49,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:49,397 INFO L93 Difference]: Finished difference Result 18117 states and 53136 transitions. [2021-06-05 21:20:49,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:20:49,398 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:20:49,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:49,418 INFO L225 Difference]: With dead ends: 18117 [2021-06-05 21:20:49,418 INFO L226 Difference]: Without dead ends: 18109 [2021-06-05 21:20:49,418 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 139.2ms TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:20:49,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18109 states. [2021-06-05 21:20:49,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18109 to 17756. [2021-06-05 21:20:49,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17756 states, 17755 states have (on average 2.9588848211771333) internal successors, (52535), 17755 states have internal predecessors, (52535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:49,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17756 states to 17756 states and 52535 transitions. [2021-06-05 21:20:49,723 INFO L78 Accepts]: Start accepts. Automaton has 17756 states and 52535 transitions. Word has length 23 [2021-06-05 21:20:49,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:49,724 INFO L482 AbstractCegarLoop]: Abstraction has 17756 states and 52535 transitions. [2021-06-05 21:20:49,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:49,724 INFO L276 IsEmpty]: Start isEmpty. Operand 17756 states and 52535 transitions. [2021-06-05 21:20:49,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:20:49,739 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:49,739 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:49,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3053,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:49,939 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:49,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:49,939 INFO L82 PathProgramCache]: Analyzing trace with hash -630973880, now seen corresponding path program 341 times [2021-06-05 21:20:49,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:49,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59246594] [2021-06-05 21:20:49,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:49,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:50,019 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:20:50,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:50,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59246594] [2021-06-05 21:20:50,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59246594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:50,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89025664] [2021-06-05 21:20:50,019 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:50,045 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:20:50,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:50,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:20:50,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:50,079 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:20:50,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89025664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:50,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:50,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-06-05 21:20:50,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978535119] [2021-06-05 21:20:50,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:20:50,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:50,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:20:50,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:20:50,080 INFO L87 Difference]: Start difference. First operand 17756 states and 52535 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:50,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:50,307 INFO L93 Difference]: Finished difference Result 19811 states and 57453 transitions. [2021-06-05 21:20:50,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:20:50,307 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:20:50,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:50,335 INFO L225 Difference]: With dead ends: 19811 [2021-06-05 21:20:50,336 INFO L226 Difference]: Without dead ends: 19801 [2021-06-05 21:20:50,336 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 157.8ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:20:50,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19801 states. [2021-06-05 21:20:50,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19801 to 17805. [2021-06-05 21:20:50,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17805 states, 17804 states have (on average 2.9582116378341947) internal successors, (52668), 17804 states have internal predecessors, (52668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:50,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17805 states to 17805 states and 52668 transitions. [2021-06-05 21:20:50,606 INFO L78 Accepts]: Start accepts. Automaton has 17805 states and 52668 transitions. Word has length 23 [2021-06-05 21:20:50,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:50,606 INFO L482 AbstractCegarLoop]: Abstraction has 17805 states and 52668 transitions. [2021-06-05 21:20:50,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:50,606 INFO L276 IsEmpty]: Start isEmpty. Operand 17805 states and 52668 transitions. [2021-06-05 21:20:50,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:20:50,620 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:50,620 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:50,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3054 [2021-06-05 21:20:50,820 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:50,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:50,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1475945332, now seen corresponding path program 342 times [2021-06-05 21:20:50,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:50,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254050787] [2021-06-05 21:20:50,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:50,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:50,904 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:50,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:50,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254050787] [2021-06-05 21:20:50,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254050787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:50,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316549615] [2021-06-05 21:20:50,904 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:50,928 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:20:50,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:50,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:20:50,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:50,964 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:50,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316549615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:50,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:50,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 21:20:50,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580318873] [2021-06-05 21:20:50,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:20:50,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:50,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:20:50,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:20:50,965 INFO L87 Difference]: Start difference. First operand 17805 states and 52668 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:51,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:51,199 INFO L93 Difference]: Finished difference Result 19831 states and 57467 transitions. [2021-06-05 21:20:51,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:20:51,199 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:20:51,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:51,226 INFO L225 Difference]: With dead ends: 19831 [2021-06-05 21:20:51,226 INFO L226 Difference]: Without dead ends: 19819 [2021-06-05 21:20:51,227 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 174.1ms TimeCoverageRelationStatistics Valid=298, Invalid=632, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:20:51,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19819 states. [2021-06-05 21:20:51,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19819 to 17849. [2021-06-05 21:20:51,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17849 states, 17848 states have (on average 2.9575302554908114) internal successors, (52786), 17848 states have internal predecessors, (52786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:51,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17849 states to 17849 states and 52786 transitions. [2021-06-05 21:20:51,502 INFO L78 Accepts]: Start accepts. Automaton has 17849 states and 52786 transitions. Word has length 23 [2021-06-05 21:20:51,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:51,502 INFO L482 AbstractCegarLoop]: Abstraction has 17849 states and 52786 transitions. [2021-06-05 21:20:51,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:51,502 INFO L276 IsEmpty]: Start isEmpty. Operand 17849 states and 52786 transitions. [2021-06-05 21:20:51,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:20:51,518 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:51,518 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:51,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3055,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:51,718 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:51,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:51,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1900256568, now seen corresponding path program 343 times [2021-06-05 21:20:51,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:51,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646383003] [2021-06-05 21:20:51,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:51,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:51,825 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:51,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:51,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646383003] [2021-06-05 21:20:51,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646383003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:51,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857833462] [2021-06-05 21:20:51,825 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:51,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:51,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:20:51,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:51,893 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 39 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:20:51,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857833462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:51,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:51,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-06-05 21:20:51,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404487415] [2021-06-05 21:20:51,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:20:51,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:51,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:20:51,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:20:51,894 INFO L87 Difference]: Start difference. First operand 17849 states and 52786 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:52,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:52,186 INFO L93 Difference]: Finished difference Result 19267 states and 56030 transitions. [2021-06-05 21:20:52,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:20:52,187 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:20:52,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:52,214 INFO L225 Difference]: With dead ends: 19267 [2021-06-05 21:20:52,214 INFO L226 Difference]: Without dead ends: 19253 [2021-06-05 21:20:52,214 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 245.0ms TimeCoverageRelationStatistics Valid=385, Invalid=805, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:20:52,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19253 states. [2021-06-05 21:20:52,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19253 to 17849. [2021-06-05 21:20:52,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17849 states, 17848 states have (on average 2.9572501120573733) internal successors, (52781), 17848 states have internal predecessors, (52781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:52,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17849 states to 17849 states and 52781 transitions. [2021-06-05 21:20:52,474 INFO L78 Accepts]: Start accepts. Automaton has 17849 states and 52781 transitions. Word has length 23 [2021-06-05 21:20:52,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:52,474 INFO L482 AbstractCegarLoop]: Abstraction has 17849 states and 52781 transitions. [2021-06-05 21:20:52,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:52,474 INFO L276 IsEmpty]: Start isEmpty. Operand 17849 states and 52781 transitions. [2021-06-05 21:20:52,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:20:52,488 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:52,488 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:52,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3056 [2021-06-05 21:20:52,689 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:52,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:52,689 INFO L82 PathProgramCache]: Analyzing trace with hash -2144238716, now seen corresponding path program 344 times [2021-06-05 21:20:52,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:52,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242367405] [2021-06-05 21:20:52,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:52,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:52,765 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:52,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:52,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242367405] [2021-06-05 21:20:52,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242367405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:52,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603292431] [2021-06-05 21:20:52,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:52,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:20:52,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:52,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:20:52,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:52,847 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 41 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:20:52,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603292431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:52,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:52,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:20:52,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984085214] [2021-06-05 21:20:52,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:20:52,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:52,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:20:52,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:20:52,849 INFO L87 Difference]: Start difference. First operand 17849 states and 52781 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:53,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:53,041 INFO L93 Difference]: Finished difference Result 18130 states and 53192 transitions. [2021-06-05 21:20:53,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:20:53,041 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:20:53,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:53,074 INFO L225 Difference]: With dead ends: 18130 [2021-06-05 21:20:53,074 INFO L226 Difference]: Without dead ends: 18126 [2021-06-05 21:20:53,074 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 118.2ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:20:53,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18126 states. [2021-06-05 21:20:53,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18126 to 17787. [2021-06-05 21:20:53,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17787 states, 17786 states have (on average 2.9562015068031036) internal successors, (52579), 17786 states have internal predecessors, (52579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:53,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17787 states to 17787 states and 52579 transitions. [2021-06-05 21:20:53,409 INFO L78 Accepts]: Start accepts. Automaton has 17787 states and 52579 transitions. Word has length 23 [2021-06-05 21:20:53,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:53,409 INFO L482 AbstractCegarLoop]: Abstraction has 17787 states and 52579 transitions. [2021-06-05 21:20:53,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:53,409 INFO L276 IsEmpty]: Start isEmpty. Operand 17787 states and 52579 transitions. [2021-06-05 21:20:53,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:20:53,425 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:53,425 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:53,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3057,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:53,640 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:53,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:53,640 INFO L82 PathProgramCache]: Analyzing trace with hash 907814562, now seen corresponding path program 345 times [2021-06-05 21:20:53,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:53,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370488647] [2021-06-05 21:20:53,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:53,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:53,910 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:20:53,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:53,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370488647] [2021-06-05 21:20:53,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370488647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:53,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649326670] [2021-06-05 21:20:53,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:53,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:20:53,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:53,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:20:53,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:53,992 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:20:53,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649326670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:53,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:53,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:20:53,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779076804] [2021-06-05 21:20:53,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:20:53,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:53,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:20:53,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:20:53,993 INFO L87 Difference]: Start difference. First operand 17787 states and 52579 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:54,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:54,259 INFO L93 Difference]: Finished difference Result 18203 states and 53300 transitions. [2021-06-05 21:20:54,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:20:54,260 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:20:54,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:54,293 INFO L225 Difference]: With dead ends: 18203 [2021-06-05 21:20:54,293 INFO L226 Difference]: Without dead ends: 18188 [2021-06-05 21:20:54,293 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 361.5ms TimeCoverageRelationStatistics Valid=261, Invalid=551, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:20:54,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18188 states. [2021-06-05 21:20:54,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18188 to 17734. [2021-06-05 21:20:54,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17734 states, 17733 states have (on average 2.9543224496701064) internal successors, (52389), 17733 states have internal predecessors, (52389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:54,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17734 states to 17734 states and 52389 transitions. [2021-06-05 21:20:54,653 INFO L78 Accepts]: Start accepts. Automaton has 17734 states and 52389 transitions. Word has length 23 [2021-06-05 21:20:54,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:54,653 INFO L482 AbstractCegarLoop]: Abstraction has 17734 states and 52389 transitions. [2021-06-05 21:20:54,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:54,654 INFO L276 IsEmpty]: Start isEmpty. Operand 17734 states and 52389 transitions. [2021-06-05 21:20:54,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:20:54,670 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:54,670 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:54,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3058,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:54,889 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:54,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:54,889 INFO L82 PathProgramCache]: Analyzing trace with hash 62843110, now seen corresponding path program 346 times [2021-06-05 21:20:54,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:54,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508645289] [2021-06-05 21:20:54,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:54,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:54,992 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:54,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:54,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508645289] [2021-06-05 21:20:54,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508645289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:54,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475638333] [2021-06-05 21:20:54,992 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:55,022 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:20:55,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:55,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:20:55,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:55,071 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 33 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:20:55,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475638333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:55,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:55,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2021-06-05 21:20:55,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947801678] [2021-06-05 21:20:55,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:20:55,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:55,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:20:55,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:20:55,072 INFO L87 Difference]: Start difference. First operand 17734 states and 52389 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:55,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:55,360 INFO L93 Difference]: Finished difference Result 18155 states and 53119 transitions. [2021-06-05 21:20:55,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:20:55,360 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:20:55,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:55,392 INFO L225 Difference]: With dead ends: 18155 [2021-06-05 21:20:55,392 INFO L226 Difference]: Without dead ends: 18143 [2021-06-05 21:20:55,393 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 207.8ms TimeCoverageRelationStatistics Valid=297, Invalid=633, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:20:55,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18143 states. [2021-06-05 21:20:55,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18143 to 17705. [2021-06-05 21:20:55,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17705 states, 17704 states have (on average 2.9526660641662903) internal successors, (52274), 17704 states have internal predecessors, (52274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:55,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17705 states to 17705 states and 52274 transitions. [2021-06-05 21:20:55,762 INFO L78 Accepts]: Start accepts. Automaton has 17705 states and 52274 transitions. Word has length 23 [2021-06-05 21:20:55,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:55,762 INFO L482 AbstractCegarLoop]: Abstraction has 17705 states and 52274 transitions. [2021-06-05 21:20:55,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:55,762 INFO L276 IsEmpty]: Start isEmpty. Operand 17705 states and 52274 transitions. [2021-06-05 21:20:55,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:20:55,779 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:55,779 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:55,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3059,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:55,993 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:55,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:55,994 INFO L82 PathProgramCache]: Analyzing trace with hash -361468126, now seen corresponding path program 347 times [2021-06-05 21:20:55,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:55,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212316005] [2021-06-05 21:20:55,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:55,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:56,100 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:56,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:56,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212316005] [2021-06-05 21:20:56,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212316005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:56,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498010547] [2021-06-05 21:20:56,100 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:56,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:20:56,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:56,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:20:56,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:56,182 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:56,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498010547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:56,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:56,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 21:20:56,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388375400] [2021-06-05 21:20:56,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:20:56,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:56,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:20:56,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:20:56,183 INFO L87 Difference]: Start difference. First operand 17705 states and 52274 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:56,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:56,541 INFO L93 Difference]: Finished difference Result 18640 states and 54430 transitions. [2021-06-05 21:20:56,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:20:56,542 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:20:56,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:56,575 INFO L225 Difference]: With dead ends: 18640 [2021-06-05 21:20:56,575 INFO L226 Difference]: Without dead ends: 18626 [2021-06-05 21:20:56,575 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 263.6ms TimeCoverageRelationStatistics Valid=378, Invalid=812, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:20:56,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18626 states. [2021-06-05 21:20:56,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18626 to 17706. [2021-06-05 21:20:56,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17706 states, 17705 states have (on average 2.952216887884778) internal successors, (52269), 17705 states have internal predecessors, (52269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:56,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17706 states to 17706 states and 52269 transitions. [2021-06-05 21:20:56,940 INFO L78 Accepts]: Start accepts. Automaton has 17706 states and 52269 transitions. Word has length 23 [2021-06-05 21:20:56,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:56,941 INFO L482 AbstractCegarLoop]: Abstraction has 17706 states and 52269 transitions. [2021-06-05 21:20:56,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:56,941 INFO L276 IsEmpty]: Start isEmpty. Operand 17706 states and 52269 transitions. [2021-06-05 21:20:56,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:20:56,959 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:56,959 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:57,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3060,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:57,177 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:57,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:57,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1602127322, now seen corresponding path program 348 times [2021-06-05 21:20:57,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:57,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246811337] [2021-06-05 21:20:57,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:57,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:57,280 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:57,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:57,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246811337] [2021-06-05 21:20:57,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246811337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:57,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434919171] [2021-06-05 21:20:57,281 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:57,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:20:57,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:57,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:20:57,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:57,434 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 39 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:20:57,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434919171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:57,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:57,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:20:57,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991146085] [2021-06-05 21:20:57,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:20:57,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:57,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:20:57,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:20:57,436 INFO L87 Difference]: Start difference. First operand 17706 states and 52269 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:57,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:57,635 INFO L93 Difference]: Finished difference Result 18069 states and 52830 transitions. [2021-06-05 21:20:57,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:20:57,635 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:20:57,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:57,668 INFO L225 Difference]: With dead ends: 18069 [2021-06-05 21:20:57,669 INFO L226 Difference]: Without dead ends: 18069 [2021-06-05 21:20:57,669 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 108.7ms TimeCoverageRelationStatistics Valid=120, Invalid=186, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:20:57,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18069 states. [2021-06-05 21:20:57,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18069 to 17709. [2021-06-05 21:20:57,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17709 states, 17708 states have (on average 2.9522249830585046) internal successors, (52278), 17708 states have internal predecessors, (52278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:58,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17709 states to 17709 states and 52278 transitions. [2021-06-05 21:20:58,035 INFO L78 Accepts]: Start accepts. Automaton has 17709 states and 52278 transitions. Word has length 23 [2021-06-05 21:20:58,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:58,035 INFO L482 AbstractCegarLoop]: Abstraction has 17709 states and 52278 transitions. [2021-06-05 21:20:58,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:58,035 INFO L276 IsEmpty]: Start isEmpty. Operand 17709 states and 52278 transitions. [2021-06-05 21:20:58,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:20:58,053 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:58,053 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:58,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3061 [2021-06-05 21:20:58,266 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:58,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:58,266 INFO L82 PathProgramCache]: Analyzing trace with hash 935096200, now seen corresponding path program 349 times [2021-06-05 21:20:58,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:58,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204599680] [2021-06-05 21:20:58,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:58,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:58,365 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:58,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:58,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204599680] [2021-06-05 21:20:58,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204599680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:58,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299932697] [2021-06-05 21:20:58,366 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:58,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:58,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:20:58,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:58,431 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 39 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:20:58,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299932697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:58,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:58,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2021-06-05 21:20:58,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880362722] [2021-06-05 21:20:58,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:20:58,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:58,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:20:58,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:20:58,432 INFO L87 Difference]: Start difference. First operand 17709 states and 52278 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:58,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:58,721 INFO L93 Difference]: Finished difference Result 19393 states and 56292 transitions. [2021-06-05 21:20:58,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:20:58,721 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:20:58,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:58,746 INFO L225 Difference]: With dead ends: 19393 [2021-06-05 21:20:58,746 INFO L226 Difference]: Without dead ends: 19379 [2021-06-05 21:20:58,746 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 241.7ms TimeCoverageRelationStatistics Valid=318, Invalid=674, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:20:58,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19379 states. [2021-06-05 21:20:58,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19379 to 17740. [2021-06-05 21:20:58,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17740 states, 17739 states have (on average 2.9508991487682508) internal successors, (52346), 17739 states have internal predecessors, (52346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:59,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17740 states to 17740 states and 52346 transitions. [2021-06-05 21:20:59,010 INFO L78 Accepts]: Start accepts. Automaton has 17740 states and 52346 transitions. Word has length 23 [2021-06-05 21:20:59,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:59,010 INFO L482 AbstractCegarLoop]: Abstraction has 17740 states and 52346 transitions. [2021-06-05 21:20:59,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:59,010 INFO L276 IsEmpty]: Start isEmpty. Operand 17740 states and 52346 transitions. [2021-06-05 21:20:59,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:20:59,026 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:59,026 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:59,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3062 [2021-06-05 21:20:59,226 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:59,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:59,227 INFO L82 PathProgramCache]: Analyzing trace with hash 216475460, now seen corresponding path program 350 times [2021-06-05 21:20:59,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:59,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170048365] [2021-06-05 21:20:59,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:59,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:59,279 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:59,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:59,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170048365] [2021-06-05 21:20:59,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170048365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:59,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34440213] [2021-06-05 21:20:59,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:59,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:20:59,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:59,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:20:59,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:59,347 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:20:59,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34440213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:59,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:59,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-06-05 21:20:59,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004468739] [2021-06-05 21:20:59,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:20:59,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:59,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:20:59,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:20:59,348 INFO L87 Difference]: Start difference. First operand 17740 states and 52346 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:59,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:59,455 INFO L93 Difference]: Finished difference Result 18165 states and 52994 transitions. [2021-06-05 21:20:59,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:20:59,456 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:20:59,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:59,477 INFO L225 Difference]: With dead ends: 18165 [2021-06-05 21:20:59,477 INFO L226 Difference]: Without dead ends: 18165 [2021-06-05 21:20:59,477 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 57.9ms TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:20:59,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18165 states. [2021-06-05 21:20:59,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18165 to 17749. [2021-06-05 21:20:59,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17749 states, 17748 states have (on average 2.9512621140410187) internal successors, (52379), 17748 states have internal predecessors, (52379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:59,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17749 states to 17749 states and 52379 transitions. [2021-06-05 21:20:59,733 INFO L78 Accepts]: Start accepts. Automaton has 17749 states and 52379 transitions. Word has length 23 [2021-06-05 21:20:59,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:59,733 INFO L482 AbstractCegarLoop]: Abstraction has 17749 states and 52379 transitions. [2021-06-05 21:20:59,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:59,734 INFO L276 IsEmpty]: Start isEmpty. Operand 17749 states and 52379 transitions. [2021-06-05 21:20:59,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:20:59,749 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:59,749 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:59,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3063,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:59,950 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:59,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:59,950 INFO L82 PathProgramCache]: Analyzing trace with hash -622423838, now seen corresponding path program 351 times [2021-06-05 21:20:59,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:59,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913412878] [2021-06-05 21:20:59,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:59,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:00,052 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 35 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:00,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:00,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913412878] [2021-06-05 21:21:00,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913412878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:00,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341019602] [2021-06-05 21:21:00,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:00,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:21:00,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:00,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:21:00,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:00,140 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 35 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:00,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341019602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:00,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:00,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:21:00,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131693226] [2021-06-05 21:21:00,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:21:00,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:00,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:21:00,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:21:00,141 INFO L87 Difference]: Start difference. First operand 17749 states and 52379 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:00,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:00,363 INFO L93 Difference]: Finished difference Result 18087 states and 52839 transitions. [2021-06-05 21:21:00,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:21:00,363 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:21:00,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:00,395 INFO L225 Difference]: With dead ends: 18087 [2021-06-05 21:21:00,395 INFO L226 Difference]: Without dead ends: 18085 [2021-06-05 21:21:00,395 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 138.0ms TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:21:00,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18085 states. [2021-06-05 21:21:00,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18085 to 17749. [2021-06-05 21:21:00,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17749 states, 17748 states have (on average 2.9509240477800316) internal successors, (52373), 17748 states have internal predecessors, (52373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:00,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17749 states to 17749 states and 52373 transitions. [2021-06-05 21:21:00,756 INFO L78 Accepts]: Start accepts. Automaton has 17749 states and 52373 transitions. Word has length 23 [2021-06-05 21:21:00,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:00,756 INFO L482 AbstractCegarLoop]: Abstraction has 17749 states and 52373 transitions. [2021-06-05 21:21:00,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:00,756 INFO L276 IsEmpty]: Start isEmpty. Operand 17749 states and 52373 transitions. [2021-06-05 21:21:00,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:21:00,774 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:00,774 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:00,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3064 [2021-06-05 21:21:00,985 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:00,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:00,985 INFO L82 PathProgramCache]: Analyzing trace with hash 866981158, now seen corresponding path program 352 times [2021-06-05 21:21:00,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:00,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211978841] [2021-06-05 21:21:00,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:00,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:01,045 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 30 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:21:01,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:01,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211978841] [2021-06-05 21:21:01,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211978841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:01,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485146439] [2021-06-05 21:21:01,046 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:01,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:21:01,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:01,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:21:01,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:01,108 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:21:01,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485146439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:01,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:01,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-06-05 21:21:01,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185276505] [2021-06-05 21:21:01,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:21:01,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:01,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:21:01,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:21:01,109 INFO L87 Difference]: Start difference. First operand 17749 states and 52373 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:01,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:01,311 INFO L93 Difference]: Finished difference Result 18093 states and 52841 transitions. [2021-06-05 21:21:01,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:21:01,312 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:21:01,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:01,338 INFO L225 Difference]: With dead ends: 18093 [2021-06-05 21:21:01,338 INFO L226 Difference]: Without dead ends: 18089 [2021-06-05 21:21:01,338 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 123.4ms TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:21:01,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18089 states. [2021-06-05 21:21:01,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18089 to 17749. [2021-06-05 21:21:01,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17749 states, 17748 states have (on average 2.94990984899707) internal successors, (52355), 17748 states have internal predecessors, (52355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:01,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17749 states to 17749 states and 52355 transitions. [2021-06-05 21:21:01,616 INFO L78 Accepts]: Start accepts. Automaton has 17749 states and 52355 transitions. Word has length 23 [2021-06-05 21:21:01,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:01,617 INFO L482 AbstractCegarLoop]: Abstraction has 17749 states and 52355 transitions. [2021-06-05 21:21:01,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:01,617 INFO L276 IsEmpty]: Start isEmpty. Operand 17749 states and 52355 transitions. [2021-06-05 21:21:01,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:21:01,632 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:01,632 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:01,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3065,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:01,832 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:01,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:01,833 INFO L82 PathProgramCache]: Analyzing trace with hash -206104222, now seen corresponding path program 353 times [2021-06-05 21:21:01,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:01,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759985382] [2021-06-05 21:21:01,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:01,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:01,899 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:01,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:01,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759985382] [2021-06-05 21:21:01,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759985382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:01,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107528268] [2021-06-05 21:21:01,900 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:01,924 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:21:01,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:01,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:21:01,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:01,964 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 33 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:21:01,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107528268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:01,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:01,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-06-05 21:21:01,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052164109] [2021-06-05 21:21:01,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:21:01,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:01,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:21:01,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:21:01,965 INFO L87 Difference]: Start difference. First operand 17749 states and 52355 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:02,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:02,180 INFO L93 Difference]: Finished difference Result 18102 states and 52836 transitions. [2021-06-05 21:21:02,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:21:02,180 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:21:02,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:02,204 INFO L225 Difference]: With dead ends: 18102 [2021-06-05 21:21:02,204 INFO L226 Difference]: Without dead ends: 18096 [2021-06-05 21:21:02,204 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 134.7ms TimeCoverageRelationStatistics Valid=233, Invalid=469, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:21:02,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18096 states. [2021-06-05 21:21:02,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18096 to 17749. [2021-06-05 21:21:02,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17749 states, 17748 states have (on average 2.948388550822628) internal successors, (52328), 17748 states have internal predecessors, (52328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:02,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17749 states to 17749 states and 52328 transitions. [2021-06-05 21:21:02,513 INFO L78 Accepts]: Start accepts. Automaton has 17749 states and 52328 transitions. Word has length 23 [2021-06-05 21:21:02,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:02,513 INFO L482 AbstractCegarLoop]: Abstraction has 17749 states and 52328 transitions. [2021-06-05 21:21:02,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:02,513 INFO L276 IsEmpty]: Start isEmpty. Operand 17749 states and 52328 transitions. [2021-06-05 21:21:02,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:21:02,527 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:02,527 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:02,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3066 [2021-06-05 21:21:02,728 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:02,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:02,728 INFO L82 PathProgramCache]: Analyzing trace with hash 887987366, now seen corresponding path program 354 times [2021-06-05 21:21:02,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:02,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361049797] [2021-06-05 21:21:02,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:02,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:02,797 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 27 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:21:02,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:02,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361049797] [2021-06-05 21:21:02,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361049797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:02,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062791913] [2021-06-05 21:21:02,798 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:02,822 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:21:02,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:02,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:21:02,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:02,863 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 27 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:21:02,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062791913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:02,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:02,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:21:02,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975177448] [2021-06-05 21:21:02,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:21:02,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:02,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:21:02,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:21:02,864 INFO L87 Difference]: Start difference. First operand 17749 states and 52328 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:03,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:03,097 INFO L93 Difference]: Finished difference Result 20612 states and 59720 transitions. [2021-06-05 21:21:03,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:21:03,097 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:21:03,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:03,122 INFO L225 Difference]: With dead ends: 20612 [2021-06-05 21:21:03,122 INFO L226 Difference]: Without dead ends: 20604 [2021-06-05 21:21:03,123 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 145.4ms TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:21:03,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20604 states. [2021-06-05 21:21:03,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20604 to 17773. [2021-06-05 21:21:03,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17773 states, 17772 states have (on average 2.9481769074949358) internal successors, (52395), 17772 states have internal predecessors, (52395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:03,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17773 states to 17773 states and 52395 transitions. [2021-06-05 21:21:03,387 INFO L78 Accepts]: Start accepts. Automaton has 17773 states and 52395 transitions. Word has length 23 [2021-06-05 21:21:03,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:03,387 INFO L482 AbstractCegarLoop]: Abstraction has 17773 states and 52395 transitions. [2021-06-05 21:21:03,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:03,387 INFO L276 IsEmpty]: Start isEmpty. Operand 17773 states and 52395 transitions. [2021-06-05 21:21:03,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:21:03,401 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:03,401 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:03,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 356 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3067 [2021-06-05 21:21:03,602 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:03,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:03,602 INFO L82 PathProgramCache]: Analyzing trace with hash 445088226, now seen corresponding path program 355 times [2021-06-05 21:21:03,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:03,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183008117] [2021-06-05 21:21:03,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:03,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:03,681 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:03,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:03,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183008117] [2021-06-05 21:21:03,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183008117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:03,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333509740] [2021-06-05 21:21:03,682 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:03,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:03,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:21:03,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:03,746 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:21:03,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333509740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:03,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:03,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-06-05 21:21:03,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569414250] [2021-06-05 21:21:03,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:21:03,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:03,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:21:03,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:21:03,747 INFO L87 Difference]: Start difference. First operand 17773 states and 52395 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:03,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:03,985 INFO L93 Difference]: Finished difference Result 20639 states and 59747 transitions. [2021-06-05 21:21:03,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:21:03,985 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:21:03,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:04,013 INFO L225 Difference]: With dead ends: 20639 [2021-06-05 21:21:04,013 INFO L226 Difference]: Without dead ends: 20629 [2021-06-05 21:21:04,013 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 166.6ms TimeCoverageRelationStatistics Valid=280, Invalid=590, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:21:04,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20629 states. [2021-06-05 21:21:04,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20629 to 17895. [2021-06-05 21:21:04,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17895 states, 17894 states have (on average 2.948418464289706) internal successors, (52759), 17894 states have internal predecessors, (52759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:04,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17895 states to 17895 states and 52759 transitions. [2021-06-05 21:21:04,273 INFO L78 Accepts]: Start accepts. Automaton has 17895 states and 52759 transitions. Word has length 23 [2021-06-05 21:21:04,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:04,273 INFO L482 AbstractCegarLoop]: Abstraction has 17895 states and 52759 transitions. [2021-06-05 21:21:04,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:04,273 INFO L276 IsEmpty]: Start isEmpty. Operand 17895 states and 52759 transitions. [2021-06-05 21:21:04,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:21:04,290 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:04,290 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:04,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3068,357 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:04,491 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:04,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:04,491 INFO L82 PathProgramCache]: Analyzing trace with hash -399883226, now seen corresponding path program 356 times [2021-06-05 21:21:04,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:04,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906349929] [2021-06-05 21:21:04,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:04,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:04,574 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:21:04,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:04,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906349929] [2021-06-05 21:21:04,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906349929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:04,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646595138] [2021-06-05 21:21:04,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:04,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:21:04,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:04,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:21:04,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:04,640 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:21:04,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646595138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:04,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:04,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-06-05 21:21:04,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373773373] [2021-06-05 21:21:04,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:21:04,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:04,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:21:04,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:21:04,641 INFO L87 Difference]: Start difference. First operand 17895 states and 52759 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:04,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:04,924 INFO L93 Difference]: Finished difference Result 20525 states and 59344 transitions. [2021-06-05 21:21:04,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:21:04,925 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:21:04,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:04,953 INFO L225 Difference]: With dead ends: 20525 [2021-06-05 21:21:04,953 INFO L226 Difference]: Without dead ends: 20513 [2021-06-05 21:21:04,954 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 200.1ms TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:21:04,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20513 states. [2021-06-05 21:21:05,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20513 to 17903. [2021-06-05 21:21:05,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17903 states, 17902 states have (on average 2.948218076192604) internal successors, (52779), 17902 states have internal predecessors, (52779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:05,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17903 states to 17903 states and 52779 transitions. [2021-06-05 21:21:05,217 INFO L78 Accepts]: Start accepts. Automaton has 17903 states and 52779 transitions. Word has length 23 [2021-06-05 21:21:05,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:05,217 INFO L482 AbstractCegarLoop]: Abstraction has 17903 states and 52779 transitions. [2021-06-05 21:21:05,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:05,217 INFO L276 IsEmpty]: Start isEmpty. Operand 17903 states and 52779 transitions. [2021-06-05 21:21:05,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:21:05,233 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:05,233 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:05,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3069,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:05,433 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:05,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:05,433 INFO L82 PathProgramCache]: Analyzing trace with hash -824194462, now seen corresponding path program 357 times [2021-06-05 21:21:05,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:05,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246889887] [2021-06-05 21:21:05,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:05,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:05,523 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:05,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:05,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246889887] [2021-06-05 21:21:05,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246889887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:05,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310857715] [2021-06-05 21:21:05,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:05,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:21:05,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:05,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:21:05,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:05,593 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:05,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310857715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:05,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:05,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 21:21:05,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440327071] [2021-06-05 21:21:05,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:21:05,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:05,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:21:05,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:21:05,594 INFO L87 Difference]: Start difference. First operand 17903 states and 52779 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:05,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:05,895 INFO L93 Difference]: Finished difference Result 20558 states and 59379 transitions. [2021-06-05 21:21:05,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:21:05,895 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:21:05,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:05,924 INFO L225 Difference]: With dead ends: 20558 [2021-06-05 21:21:05,924 INFO L226 Difference]: Without dead ends: 20544 [2021-06-05 21:21:05,925 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 220.8ms TimeCoverageRelationStatistics Valid=384, Invalid=806, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:21:05,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20544 states. [2021-06-05 21:21:06,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20544 to 17922. [2021-06-05 21:21:06,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17922 states, 17921 states have (on average 2.9477707717203283) internal successors, (52827), 17921 states have internal predecessors, (52827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:06,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17922 states to 17922 states and 52827 transitions. [2021-06-05 21:21:06,236 INFO L78 Accepts]: Start accepts. Automaton has 17922 states and 52827 transitions. Word has length 23 [2021-06-05 21:21:06,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:06,236 INFO L482 AbstractCegarLoop]: Abstraction has 17922 states and 52827 transitions. [2021-06-05 21:21:06,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:06,236 INFO L276 IsEmpty]: Start isEmpty. Operand 17922 states and 52827 transitions. [2021-06-05 21:21:06,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:21:06,252 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:06,252 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:06,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3070 [2021-06-05 21:21:06,452 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:06,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:06,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1092940890, now seen corresponding path program 358 times [2021-06-05 21:21:06,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:06,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927604091] [2021-06-05 21:21:06,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:06,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:06,552 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:06,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:06,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927604091] [2021-06-05 21:21:06,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927604091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:06,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515190851] [2021-06-05 21:21:06,552 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:06,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:21:06,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:06,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:21:06,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:06,619 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:21:06,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515190851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:06,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:06,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2021-06-05 21:21:06,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670718556] [2021-06-05 21:21:06,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:21:06,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:06,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:21:06,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:21:06,620 INFO L87 Difference]: Start difference. First operand 17922 states and 52827 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:07,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:07,005 INFO L93 Difference]: Finished difference Result 19475 states and 56422 transitions. [2021-06-05 21:21:07,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 21:21:07,005 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:21:07,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:07,029 INFO L225 Difference]: With dead ends: 19475 [2021-06-05 21:21:07,029 INFO L226 Difference]: Without dead ends: 19459 [2021-06-05 21:21:07,029 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 290.0ms TimeCoverageRelationStatistics Valid=511, Invalid=1049, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 21:21:07,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19459 states. [2021-06-05 21:21:07,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19459 to 17924. [2021-06-05 21:21:07,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17924 states, 17923 states have (on average 2.9474418345143114) internal successors, (52827), 17923 states have internal predecessors, (52827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:07,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17924 states to 17924 states and 52827 transitions. [2021-06-05 21:21:07,284 INFO L78 Accepts]: Start accepts. Automaton has 17924 states and 52827 transitions. Word has length 23 [2021-06-05 21:21:07,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:07,284 INFO L482 AbstractCegarLoop]: Abstraction has 17924 states and 52827 transitions. [2021-06-05 21:21:07,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:07,284 INFO L276 IsEmpty]: Start isEmpty. Operand 17924 states and 52827 transitions. [2021-06-05 21:21:07,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:21:07,299 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:07,299 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:07,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3071,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:07,499 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:07,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:07,499 INFO L82 PathProgramCache]: Analyzing trace with hash -416621138, now seen corresponding path program 359 times [2021-06-05 21:21:07,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:07,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498971479] [2021-06-05 21:21:07,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:07,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:07,597 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:07,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:07,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498971479] [2021-06-05 21:21:07,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498971479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:07,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579942657] [2021-06-05 21:21:07,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:07,627 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:21:07,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:07,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:21:07,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:07,702 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:21:07,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579942657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:07,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:07,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 21 [2021-06-05 21:21:07,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069697510] [2021-06-05 21:21:07,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:21:07,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:07,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:21:07,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:21:07,703 INFO L87 Difference]: Start difference. First operand 17924 states and 52827 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:07,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:07,921 INFO L93 Difference]: Finished difference Result 18184 states and 53240 transitions. [2021-06-05 21:21:07,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:21:07,922 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:21:07,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:07,945 INFO L225 Difference]: With dead ends: 18184 [2021-06-05 21:21:07,946 INFO L226 Difference]: Without dead ends: 18178 [2021-06-05 21:21:07,946 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 200.6ms TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:21:07,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18178 states. [2021-06-05 21:21:08,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18178 to 17931. [2021-06-05 21:21:08,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17931 states, 17930 states have (on average 2.946793084216397) internal successors, (52836), 17930 states have internal predecessors, (52836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:08,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17931 states to 17931 states and 52836 transitions. [2021-06-05 21:21:08,198 INFO L78 Accepts]: Start accepts. Automaton has 17931 states and 52836 transitions. Word has length 23 [2021-06-05 21:21:08,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:08,198 INFO L482 AbstractCegarLoop]: Abstraction has 17931 states and 52836 transitions. [2021-06-05 21:21:08,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:08,198 INFO L276 IsEmpty]: Start isEmpty. Operand 17931 states and 52836 transitions. [2021-06-05 21:21:08,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:21:08,211 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:08,211 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:08,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3072 [2021-06-05 21:21:08,412 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:08,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:08,412 INFO L82 PathProgramCache]: Analyzing trace with hash -2006669488, now seen corresponding path program 360 times [2021-06-05 21:21:08,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:08,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209500231] [2021-06-05 21:21:08,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:08,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:08,502 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:08,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:08,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209500231] [2021-06-05 21:21:08,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209500231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:08,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24599223] [2021-06-05 21:21:08,502 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:08,526 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:21:08,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:08,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:21:08,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:08,577 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:08,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24599223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:08,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:08,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 21:21:08,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014220128] [2021-06-05 21:21:08,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:21:08,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:08,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:21:08,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:21:08,577 INFO L87 Difference]: Start difference. First operand 17931 states and 52836 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:08,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:08,825 INFO L93 Difference]: Finished difference Result 18330 states and 53673 transitions. [2021-06-05 21:21:08,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:21:08,826 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:21:08,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:08,853 INFO L225 Difference]: With dead ends: 18330 [2021-06-05 21:21:08,853 INFO L226 Difference]: Without dead ends: 18316 [2021-06-05 21:21:08,853 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 190.7ms TimeCoverageRelationStatistics Valid=305, Invalid=687, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:21:08,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18316 states. [2021-06-05 21:21:09,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18316 to 17927. [2021-06-05 21:21:09,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17927 states, 17926 states have (on average 2.9460560080330245) internal successors, (52811), 17926 states have internal predecessors, (52811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:09,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17927 states to 17927 states and 52811 transitions. [2021-06-05 21:21:09,145 INFO L78 Accepts]: Start accepts. Automaton has 17927 states and 52811 transitions. Word has length 23 [2021-06-05 21:21:09,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:09,145 INFO L482 AbstractCegarLoop]: Abstraction has 17927 states and 52811 transitions. [2021-06-05 21:21:09,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:09,145 INFO L276 IsEmpty]: Start isEmpty. Operand 17927 states and 52811 transitions. [2021-06-05 21:21:09,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:21:09,160 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:09,160 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:09,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3073,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:09,361 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:09,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:09,361 INFO L82 PathProgramCache]: Analyzing trace with hash -2053778322, now seen corresponding path program 361 times [2021-06-05 21:21:09,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:09,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048458361] [2021-06-05 21:21:09,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:09,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:09,433 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 27 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:21:09,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:09,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048458361] [2021-06-05 21:21:09,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048458361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:09,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935072487] [2021-06-05 21:21:09,434 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:09,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:09,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:21:09,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:09,504 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:21:09,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935072487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:09,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:09,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 16 [2021-06-05 21:21:09,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224817930] [2021-06-05 21:21:09,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:21:09,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:09,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:21:09,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:21:09,505 INFO L87 Difference]: Start difference. First operand 17927 states and 52811 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:09,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:09,750 INFO L93 Difference]: Finished difference Result 18362 states and 53572 transitions. [2021-06-05 21:21:09,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:21:09,751 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:21:09,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:09,776 INFO L225 Difference]: With dead ends: 18362 [2021-06-05 21:21:09,776 INFO L226 Difference]: Without dead ends: 18354 [2021-06-05 21:21:09,777 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 156.3ms TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:21:09,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18354 states. [2021-06-05 21:21:10,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18354 to 17927. [2021-06-05 21:21:10,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17927 states, 17926 states have (on average 2.944828740377106) internal successors, (52789), 17926 states have internal predecessors, (52789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:10,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17927 states to 17927 states and 52789 transitions. [2021-06-05 21:21:10,102 INFO L78 Accepts]: Start accepts. Automaton has 17927 states and 52789 transitions. Word has length 23 [2021-06-05 21:21:10,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:10,103 INFO L482 AbstractCegarLoop]: Abstraction has 17927 states and 52789 transitions. [2021-06-05 21:21:10,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:10,103 INFO L276 IsEmpty]: Start isEmpty. Operand 17927 states and 52789 transitions. [2021-06-05 21:21:10,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:21:10,120 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:10,120 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:10,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3074 [2021-06-05 21:21:10,320 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:10,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:10,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1798289834, now seen corresponding path program 362 times [2021-06-05 21:21:10,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:10,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524939300] [2021-06-05 21:21:10,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:10,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:10,398 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:10,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:10,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524939300] [2021-06-05 21:21:10,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524939300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:10,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562956803] [2021-06-05 21:21:10,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:10,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:21:10,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:10,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:21:10,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:10,468 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:21:10,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562956803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:10,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:10,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 17 [2021-06-05 21:21:10,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33416789] [2021-06-05 21:21:10,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:21:10,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:10,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:21:10,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:21:10,469 INFO L87 Difference]: Start difference. First operand 17927 states and 52789 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:10,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:10,696 INFO L93 Difference]: Finished difference Result 18388 states and 53587 transitions. [2021-06-05 21:21:10,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:21:10,697 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:21:10,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:10,722 INFO L225 Difference]: With dead ends: 18388 [2021-06-05 21:21:10,722 INFO L226 Difference]: Without dead ends: 18378 [2021-06-05 21:21:10,723 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 162.6ms TimeCoverageRelationStatistics Valid=271, Invalid=599, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:21:10,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18378 states. [2021-06-05 21:21:10,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18378 to 17952. [2021-06-05 21:21:10,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17952 states, 17951 states have (on average 2.9439585538410116) internal successors, (52847), 17951 states have internal predecessors, (52847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:10,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17952 states to 17952 states and 52847 transitions. [2021-06-05 21:21:10,997 INFO L78 Accepts]: Start accepts. Automaton has 17952 states and 52847 transitions. Word has length 23 [2021-06-05 21:21:10,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:10,997 INFO L482 AbstractCegarLoop]: Abstraction has 17952 states and 52847 transitions. [2021-06-05 21:21:10,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:10,997 INFO L276 IsEmpty]: Start isEmpty. Operand 17952 states and 52847 transitions. [2021-06-05 21:21:11,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:21:11,013 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:11,013 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:11,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3075 [2021-06-05 21:21:11,213 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:11,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:11,213 INFO L82 PathProgramCache]: Analyzing trace with hash 953318382, now seen corresponding path program 363 times [2021-06-05 21:21:11,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:11,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860308573] [2021-06-05 21:21:11,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:11,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:11,298 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:21:11,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:11,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860308573] [2021-06-05 21:21:11,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860308573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:11,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550944770] [2021-06-05 21:21:11,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:11,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:21:11,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:11,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:21:11,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:11,373 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:21:11,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550944770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:11,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:11,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 21:21:11,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023732399] [2021-06-05 21:21:11,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:21:11,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:11,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:21:11,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:21:11,374 INFO L87 Difference]: Start difference. First operand 17952 states and 52847 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:11,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:11,647 INFO L93 Difference]: Finished difference Result 20163 states and 58154 transitions. [2021-06-05 21:21:11,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:21:11,647 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:21:11,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:11,672 INFO L225 Difference]: With dead ends: 20163 [2021-06-05 21:21:11,673 INFO L226 Difference]: Without dead ends: 20151 [2021-06-05 21:21:11,673 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 202.2ms TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:21:11,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20151 states. [2021-06-05 21:21:11,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20151 to 17952. [2021-06-05 21:21:11,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17952 states, 17951 states have (on average 2.9437914322321874) internal successors, (52844), 17951 states have internal predecessors, (52844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:11,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17952 states to 17952 states and 52844 transitions. [2021-06-05 21:21:11,914 INFO L78 Accepts]: Start accepts. Automaton has 17952 states and 52844 transitions. Word has length 23 [2021-06-05 21:21:11,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:11,914 INFO L482 AbstractCegarLoop]: Abstraction has 17952 states and 52844 transitions. [2021-06-05 21:21:11,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:11,915 INFO L276 IsEmpty]: Start isEmpty. Operand 17952 states and 52844 transitions. [2021-06-05 21:21:11,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:21:11,929 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:11,929 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:12,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 365 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3076 [2021-06-05 21:21:12,129 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:12,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:12,129 INFO L82 PathProgramCache]: Analyzing trace with hash 529007146, now seen corresponding path program 364 times [2021-06-05 21:21:12,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:12,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002551771] [2021-06-05 21:21:12,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:12,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:12,223 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:12,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:12,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002551771] [2021-06-05 21:21:12,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002551771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:12,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102770432] [2021-06-05 21:21:12,223 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:12,247 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:21:12,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:12,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:21:12,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:12,298 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 39 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:21:12,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102770432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:12,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:12,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 18 [2021-06-05 21:21:12,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830392073] [2021-06-05 21:21:12,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:21:12,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:12,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:21:12,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:21:12,298 INFO L87 Difference]: Start difference. First operand 17952 states and 52844 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:12,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:12,577 INFO L93 Difference]: Finished difference Result 20184 states and 58174 transitions. [2021-06-05 21:21:12,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:21:12,577 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:21:12,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:12,604 INFO L225 Difference]: With dead ends: 20184 [2021-06-05 21:21:12,604 INFO L226 Difference]: Without dead ends: 20170 [2021-06-05 21:21:12,604 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 227.9ms TimeCoverageRelationStatistics Valid=368, Invalid=822, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:21:12,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20170 states. [2021-06-05 21:21:12,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20170 to 17968. [2021-06-05 21:21:12,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17968 states, 17967 states have (on average 2.9436745143874883) internal successors, (52889), 17967 states have internal predecessors, (52889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:12,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17968 states to 17968 states and 52889 transitions. [2021-06-05 21:21:12,844 INFO L78 Accepts]: Start accepts. Automaton has 17968 states and 52889 transitions. Word has length 23 [2021-06-05 21:21:12,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:12,844 INFO L482 AbstractCegarLoop]: Abstraction has 17968 states and 52889 transitions. [2021-06-05 21:21:12,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:12,844 INFO L276 IsEmpty]: Start isEmpty. Operand 17968 states and 52889 transitions. [2021-06-05 21:21:12,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:21:12,858 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:12,859 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:13,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3077 [2021-06-05 21:21:13,059 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:13,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:13,059 INFO L82 PathProgramCache]: Analyzing trace with hash 260260718, now seen corresponding path program 365 times [2021-06-05 21:21:13,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:13,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417288802] [2021-06-05 21:21:13,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:13,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:13,172 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:13,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:13,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417288802] [2021-06-05 21:21:13,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417288802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:13,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608203377] [2021-06-05 21:21:13,173 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:13,197 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:21:13,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:13,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:21:13,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:13,249 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:13,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608203377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:13,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:13,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 21:21:13,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155188720] [2021-06-05 21:21:13,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:21:13,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:13,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:21:13,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:21:13,250 INFO L87 Difference]: Start difference. First operand 17968 states and 52889 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:13,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:13,617 INFO L93 Difference]: Finished difference Result 19526 states and 56440 transitions. [2021-06-05 21:21:13,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 21:21:13,618 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:21:13,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:13,642 INFO L225 Difference]: With dead ends: 19526 [2021-06-05 21:21:13,642 INFO L226 Difference]: Without dead ends: 19510 [2021-06-05 21:21:13,642 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 304.3ms TimeCoverageRelationStatistics Valid=488, Invalid=1072, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 21:21:13,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19510 states. [2021-06-05 21:21:13,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19510 to 17968. [2021-06-05 21:21:13,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17968 states, 17967 states have (on average 2.9435631991985307) internal successors, (52887), 17967 states have internal predecessors, (52887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:13,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17968 states to 17968 states and 52887 transitions. [2021-06-05 21:21:13,950 INFO L78 Accepts]: Start accepts. Automaton has 17968 states and 52887 transitions. Word has length 23 [2021-06-05 21:21:13,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:13,950 INFO L482 AbstractCegarLoop]: Abstraction has 17968 states and 52887 transitions. [2021-06-05 21:21:13,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:13,950 INFO L276 IsEmpty]: Start isEmpty. Operand 17968 states and 52887 transitions. [2021-06-05 21:21:13,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:21:13,966 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:13,966 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:14,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 367 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3078 [2021-06-05 21:21:14,166 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:14,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:14,167 INFO L82 PathProgramCache]: Analyzing trace with hash -333235662, now seen corresponding path program 366 times [2021-06-05 21:21:14,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:14,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593770116] [2021-06-05 21:21:14,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:14,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:14,266 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:14,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:14,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593770116] [2021-06-05 21:21:14,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593770116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:14,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728627813] [2021-06-05 21:21:14,267 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:14,292 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 21:21:14,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:14,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:21:14,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:14,340 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 45 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:14,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728627813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:14,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:14,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2021-06-05 21:21:14,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265096489] [2021-06-05 21:21:14,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:21:14,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:14,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:21:14,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:21:14,341 INFO L87 Difference]: Start difference. First operand 17968 states and 52887 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:14,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:14,537 INFO L93 Difference]: Finished difference Result 18372 states and 53657 transitions. [2021-06-05 21:21:14,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:21:14,538 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:21:14,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:14,563 INFO L225 Difference]: With dead ends: 18372 [2021-06-05 21:21:14,564 INFO L226 Difference]: Without dead ends: 18368 [2021-06-05 21:21:14,564 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 139.5ms TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:21:14,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18368 states. [2021-06-05 21:21:14,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18368 to 18048. [2021-06-05 21:21:14,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18048 states, 18047 states have (on average 2.9450878262315068) internal successors, (53150), 18047 states have internal predecessors, (53150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:14,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18048 states to 18048 states and 53150 transitions. [2021-06-05 21:21:14,826 INFO L78 Accepts]: Start accepts. Automaton has 18048 states and 53150 transitions. Word has length 23 [2021-06-05 21:21:14,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:14,826 INFO L482 AbstractCegarLoop]: Abstraction has 18048 states and 53150 transitions. [2021-06-05 21:21:14,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:14,826 INFO L276 IsEmpty]: Start isEmpty. Operand 18048 states and 53150 transitions. [2021-06-05 21:21:14,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:21:14,839 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:14,839 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:15,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3079,368 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:15,040 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:15,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:15,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1411119828, now seen corresponding path program 367 times [2021-06-05 21:21:15,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:15,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016700184] [2021-06-05 21:21:15,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:15,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:15,125 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:21:15,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:15,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016700184] [2021-06-05 21:21:15,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016700184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:15,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435483448] [2021-06-05 21:21:15,125 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:15,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:15,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:21:15,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:15,206 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:21:15,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435483448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:15,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:15,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 18 [2021-06-05 21:21:15,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718332734] [2021-06-05 21:21:15,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:21:15,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:15,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:21:15,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:21:15,207 INFO L87 Difference]: Start difference. First operand 18048 states and 53150 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:15,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:15,444 INFO L93 Difference]: Finished difference Result 19818 states and 57386 transitions. [2021-06-05 21:21:15,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:21:15,445 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:21:15,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:15,472 INFO L225 Difference]: With dead ends: 19818 [2021-06-05 21:21:15,472 INFO L226 Difference]: Without dead ends: 19806 [2021-06-05 21:21:15,472 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 185.0ms TimeCoverageRelationStatistics Valid=277, Invalid=653, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:21:15,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19806 states. [2021-06-05 21:21:15,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19806 to 18048. [2021-06-05 21:21:15,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18048 states, 18047 states have (on average 2.9444228957721506) internal successors, (53138), 18047 states have internal predecessors, (53138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:15,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18048 states to 18048 states and 53138 transitions. [2021-06-05 21:21:15,760 INFO L78 Accepts]: Start accepts. Automaton has 18048 states and 53138 transitions. Word has length 23 [2021-06-05 21:21:15,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:15,760 INFO L482 AbstractCegarLoop]: Abstraction has 18048 states and 53138 transitions. [2021-06-05 21:21:15,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:15,760 INFO L276 IsEmpty]: Start isEmpty. Operand 18048 states and 53138 transitions. [2021-06-05 21:21:15,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:21:15,776 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:15,776 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:15,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3080,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:15,976 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:15,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:15,976 INFO L82 PathProgramCache]: Analyzing trace with hash 986808592, now seen corresponding path program 368 times [2021-06-05 21:21:15,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:15,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594510143] [2021-06-05 21:21:15,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:15,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:16,068 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:16,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:16,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594510143] [2021-06-05 21:21:16,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594510143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:16,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507598691] [2021-06-05 21:21:16,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:16,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:21:16,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:16,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:21:16,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:16,147 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 39 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:21:16,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507598691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:16,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:16,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 19 [2021-06-05 21:21:16,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372458154] [2021-06-05 21:21:16,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:21:16,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:16,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:21:16,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:21:16,148 INFO L87 Difference]: Start difference. First operand 18048 states and 53138 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:16,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:16,403 INFO L93 Difference]: Finished difference Result 19833 states and 57393 transitions. [2021-06-05 21:21:16,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:21:16,404 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:21:16,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:16,431 INFO L225 Difference]: With dead ends: 19833 [2021-06-05 21:21:16,431 INFO L226 Difference]: Without dead ends: 19819 [2021-06-05 21:21:16,431 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 201.5ms TimeCoverageRelationStatistics Valid=314, Invalid=742, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:21:16,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19819 states. [2021-06-05 21:21:16,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19819 to 18069. [2021-06-05 21:21:16,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18069 states, 18068 states have (on average 2.9438786805401818) internal successors, (53190), 18068 states have internal predecessors, (53190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:16,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18069 states to 18069 states and 53190 transitions. [2021-06-05 21:21:16,719 INFO L78 Accepts]: Start accepts. Automaton has 18069 states and 53190 transitions. Word has length 23 [2021-06-05 21:21:16,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:16,719 INFO L482 AbstractCegarLoop]: Abstraction has 18069 states and 53190 transitions. [2021-06-05 21:21:16,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:16,720 INFO L276 IsEmpty]: Start isEmpty. Operand 18069 states and 53190 transitions. [2021-06-05 21:21:16,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:21:16,736 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:16,736 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:16,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3081,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:16,936 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:16,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:16,936 INFO L82 PathProgramCache]: Analyzing trace with hash 718062164, now seen corresponding path program 369 times [2021-06-05 21:21:16,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:16,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677343259] [2021-06-05 21:21:16,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:16,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:17,033 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:17,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:17,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677343259] [2021-06-05 21:21:17,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677343259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:17,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881980599] [2021-06-05 21:21:17,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:17,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:21:17,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:17,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:21:17,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:17,120 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:17,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881980599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:17,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:17,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 19 [2021-06-05 21:21:17,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119414715] [2021-06-05 21:21:17,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:21:17,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:17,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:21:17,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:21:17,121 INFO L87 Difference]: Start difference. First operand 18069 states and 53190 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:17,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:17,445 INFO L93 Difference]: Finished difference Result 19689 states and 56930 transitions. [2021-06-05 21:21:17,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:21:17,446 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:21:17,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:17,471 INFO L225 Difference]: With dead ends: 19689 [2021-06-05 21:21:17,471 INFO L226 Difference]: Without dead ends: 19673 [2021-06-05 21:21:17,472 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 269.2ms TimeCoverageRelationStatistics Valid=418, Invalid=988, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 21:21:17,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19673 states. [2021-06-05 21:21:17,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19673 to 18069. [2021-06-05 21:21:17,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18069 states, 18068 states have (on average 2.943767987602391) internal successors, (53188), 18068 states have internal predecessors, (53188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:17,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18069 states to 18069 states and 53188 transitions. [2021-06-05 21:21:17,773 INFO L78 Accepts]: Start accepts. Automaton has 18069 states and 53188 transitions. Word has length 23 [2021-06-05 21:21:17,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:17,773 INFO L482 AbstractCegarLoop]: Abstraction has 18069 states and 53188 transitions. [2021-06-05 21:21:17,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:17,773 INFO L276 IsEmpty]: Start isEmpty. Operand 18069 states and 53188 transitions. [2021-06-05 21:21:17,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:21:17,787 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:17,788 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:17,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3082 [2021-06-05 21:21:17,988 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:17,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:17,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1747664174, now seen corresponding path program 370 times [2021-06-05 21:21:17,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:17,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372366585] [2021-06-05 21:21:17,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:17,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:18,077 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:18,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:18,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372366585] [2021-06-05 21:21:18,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372366585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:18,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793468253] [2021-06-05 21:21:18,077 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:18,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:21:18,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:18,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:21:18,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:18,149 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 45 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:18,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793468253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:18,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:18,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 17 [2021-06-05 21:21:18,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965876090] [2021-06-05 21:21:18,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:21:18,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:18,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:21:18,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:21:18,150 INFO L87 Difference]: Start difference. First operand 18069 states and 53188 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:18,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:18,312 INFO L93 Difference]: Finished difference Result 18782 states and 54828 transitions. [2021-06-05 21:21:18,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:21:18,313 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:21:18,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:18,340 INFO L225 Difference]: With dead ends: 18782 [2021-06-05 21:21:18,340 INFO L226 Difference]: Without dead ends: 18782 [2021-06-05 21:21:18,340 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 116.3ms TimeCoverageRelationStatistics Valid=157, Invalid=305, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:21:18,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18782 states. [2021-06-05 21:21:18,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18782 to 18363. [2021-06-05 21:21:18,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18363 states, 18362 states have (on average 2.9503866681189415) internal successors, (54175), 18362 states have internal predecessors, (54175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:18,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18363 states to 18363 states and 54175 transitions. [2021-06-05 21:21:18,617 INFO L78 Accepts]: Start accepts. Automaton has 18363 states and 54175 transitions. Word has length 23 [2021-06-05 21:21:18,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:18,617 INFO L482 AbstractCegarLoop]: Abstraction has 18363 states and 54175 transitions. [2021-06-05 21:21:18,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:18,617 INFO L276 IsEmpty]: Start isEmpty. Operand 18363 states and 54175 transitions. [2021-06-05 21:21:18,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:21:18,632 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:18,632 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:18,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3083,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:18,833 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:18,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:18,833 INFO L82 PathProgramCache]: Analyzing trace with hash -2038116690, now seen corresponding path program 371 times [2021-06-05 21:21:18,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:18,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912934130] [2021-06-05 21:21:18,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:18,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:18,936 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:18,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:18,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912934130] [2021-06-05 21:21:18,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912934130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:18,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971683926] [2021-06-05 21:21:18,937 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:18,961 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:21:18,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:18,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:21:18,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:19,034 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:19,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971683926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:19,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:19,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 20 [2021-06-05 21:21:19,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169182402] [2021-06-05 21:21:19,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:21:19,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:19,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:21:19,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:21:19,035 INFO L87 Difference]: Start difference. First operand 18363 states and 54175 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:19,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:19,300 INFO L93 Difference]: Finished difference Result 20117 states and 58445 transitions. [2021-06-05 21:21:19,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:21:19,300 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:21:19,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:19,328 INFO L225 Difference]: With dead ends: 20117 [2021-06-05 21:21:19,328 INFO L226 Difference]: Without dead ends: 20101 [2021-06-05 21:21:19,329 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 236.0ms TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:21:19,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20101 states. [2021-06-05 21:21:19,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20101 to 18363. [2021-06-05 21:21:19,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18363 states, 18362 states have (on average 2.9502777475220565) internal successors, (54173), 18362 states have internal predecessors, (54173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:19,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18363 states to 18363 states and 54173 transitions. [2021-06-05 21:21:19,619 INFO L78 Accepts]: Start accepts. Automaton has 18363 states and 54173 transitions. Word has length 23 [2021-06-05 21:21:19,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:19,620 INFO L482 AbstractCegarLoop]: Abstraction has 18363 states and 54173 transitions. [2021-06-05 21:21:19,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:19,620 INFO L276 IsEmpty]: Start isEmpty. Operand 18363 states and 54173 transitions. [2021-06-05 21:21:19,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:21:19,634 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:19,634 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:19,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3084 [2021-06-05 21:21:19,835 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:19,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:19,835 INFO L82 PathProgramCache]: Analyzing trace with hash 567863986, now seen corresponding path program 372 times [2021-06-05 21:21:19,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:19,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496207836] [2021-06-05 21:21:19,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:19,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:19,925 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:19,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:19,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496207836] [2021-06-05 21:21:19,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496207836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:19,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397011589] [2021-06-05 21:21:19,925 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:19,950 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:21:19,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:19,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:21:19,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:19,996 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 45 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:19,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397011589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:19,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:19,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 17 [2021-06-05 21:21:19,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198847260] [2021-06-05 21:21:19,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:21:19,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:19,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:21:19,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:21:19,997 INFO L87 Difference]: Start difference. First operand 18363 states and 54173 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:20,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:20,124 INFO L93 Difference]: Finished difference Result 21290 states and 62446 transitions. [2021-06-05 21:21:20,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:21:20,124 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:21:20,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:20,153 INFO L225 Difference]: With dead ends: 21290 [2021-06-05 21:21:20,153 INFO L226 Difference]: Without dead ends: 21290 [2021-06-05 21:21:20,153 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 97.5ms TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:21:20,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21290 states. [2021-06-05 21:21:20,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21290 to 20833. [2021-06-05 21:21:20,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20833 states, 20832 states have (on average 2.9642857142857144) internal successors, (61752), 20832 states have internal predecessors, (61752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:20,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20833 states to 20833 states and 61752 transitions. [2021-06-05 21:21:20,502 INFO L78 Accepts]: Start accepts. Automaton has 20833 states and 61752 transitions. Word has length 23 [2021-06-05 21:21:20,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:20,502 INFO L482 AbstractCegarLoop]: Abstraction has 20833 states and 61752 transitions. [2021-06-05 21:21:20,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:20,502 INFO L276 IsEmpty]: Start isEmpty. Operand 20833 states and 61752 transitions. [2021-06-05 21:21:20,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:21:20,521 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:20,521 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:20,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3085 [2021-06-05 21:21:20,721 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:20,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:20,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1981648620, now seen corresponding path program 373 times [2021-06-05 21:21:20,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:20,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978489254] [2021-06-05 21:21:20,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:20,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:20,813 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:20,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:20,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978489254] [2021-06-05 21:21:20,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978489254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:20,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318758151] [2021-06-05 21:21:20,813 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:20,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:20,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:21:20,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:20,882 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 54 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:21:20,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318758151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:20,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:20,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 18 [2021-06-05 21:21:20,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458188403] [2021-06-05 21:21:20,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:21:20,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:20,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:21:20,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:21:20,883 INFO L87 Difference]: Start difference. First operand 20833 states and 61752 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:21,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:21,009 INFO L93 Difference]: Finished difference Result 21205 states and 62266 transitions. [2021-06-05 21:21:21,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:21:21,009 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:21:21,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:21,037 INFO L225 Difference]: With dead ends: 21205 [2021-06-05 21:21:21,037 INFO L226 Difference]: Without dead ends: 21205 [2021-06-05 21:21:21,037 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 100.9ms TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:21:21,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21205 states. [2021-06-05 21:21:21,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21205 to 20832. [2021-06-05 21:21:21,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20832 states, 20831 states have (on average 2.964187989054774) internal successors, (61747), 20831 states have internal predecessors, (61747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:21,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20832 states to 20832 states and 61747 transitions. [2021-06-05 21:21:21,421 INFO L78 Accepts]: Start accepts. Automaton has 20832 states and 61747 transitions. Word has length 23 [2021-06-05 21:21:21,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:21,422 INFO L482 AbstractCegarLoop]: Abstraction has 20832 states and 61747 transitions. [2021-06-05 21:21:21,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:21,422 INFO L276 IsEmpty]: Start isEmpty. Operand 20832 states and 61747 transitions. [2021-06-05 21:21:21,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:21:21,439 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:21,439 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:21,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3086,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:21,640 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:21,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:21,640 INFO L82 PathProgramCache]: Analyzing trace with hash -271035312, now seen corresponding path program 374 times [2021-06-05 21:21:21,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:21,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979533434] [2021-06-05 21:21:21,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:21,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:21,730 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:21,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:21,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979533434] [2021-06-05 21:21:21,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979533434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:21,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531638311] [2021-06-05 21:21:21,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:21,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:21:21,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:21,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:21:21,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:21,795 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 49 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:21:21,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531638311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:21,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:21,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 17 [2021-06-05 21:21:21,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235994934] [2021-06-05 21:21:21,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:21:21,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:21,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:21:21,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:21:21,796 INFO L87 Difference]: Start difference. First operand 20832 states and 61747 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:22,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:22,012 INFO L93 Difference]: Finished difference Result 21228 states and 62300 transitions. [2021-06-05 21:21:22,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:21:22,013 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:21:22,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:22,039 INFO L225 Difference]: With dead ends: 21228 [2021-06-05 21:21:22,039 INFO L226 Difference]: Without dead ends: 21226 [2021-06-05 21:21:22,039 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 156.4ms TimeCoverageRelationStatistics Valid=213, Invalid=489, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:21:22,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21226 states. [2021-06-05 21:21:22,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21226 to 20832. [2021-06-05 21:21:22,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20832 states, 20831 states have (on average 2.96409197830157) internal successors, (61745), 20831 states have internal predecessors, (61745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:22,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20832 states to 20832 states and 61745 transitions. [2021-06-05 21:21:22,353 INFO L78 Accepts]: Start accepts. Automaton has 20832 states and 61745 transitions. Word has length 23 [2021-06-05 21:21:22,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:22,353 INFO L482 AbstractCegarLoop]: Abstraction has 20832 states and 61745 transitions. [2021-06-05 21:21:22,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:22,353 INFO L276 IsEmpty]: Start isEmpty. Operand 20832 states and 61745 transitions. [2021-06-05 21:21:22,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:21:22,372 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:22,372 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:22,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3087 [2021-06-05 21:21:22,572 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:22,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:22,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1218369684, now seen corresponding path program 375 times [2021-06-05 21:21:22,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:22,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221095683] [2021-06-05 21:21:22,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:22,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:22,692 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:22,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:22,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221095683] [2021-06-05 21:21:22,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221095683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:22,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873675465] [2021-06-05 21:21:22,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:22,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:21:22,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:22,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:21:22,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:22,770 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 37 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:22,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873675465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:22,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:22,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 18 [2021-06-05 21:21:22,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290481857] [2021-06-05 21:21:22,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:21:22,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:22,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:21:22,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:21:22,770 INFO L87 Difference]: Start difference. First operand 20832 states and 61745 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:23,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:23,004 INFO L93 Difference]: Finished difference Result 21234 states and 62306 transitions. [2021-06-05 21:21:23,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:21:23,004 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:21:23,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:23,033 INFO L225 Difference]: With dead ends: 21234 [2021-06-05 21:21:23,033 INFO L226 Difference]: Without dead ends: 21230 [2021-06-05 21:21:23,033 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 187.3ms TimeCoverageRelationStatistics Valid=239, Invalid=573, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:21:23,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21230 states. [2021-06-05 21:21:23,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21230 to 20841. [2021-06-05 21:21:23,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20841 states, 20840 states have (on average 2.964299424184261) internal successors, (61776), 20840 states have internal predecessors, (61776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:23,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20841 states to 20841 states and 61776 transitions. [2021-06-05 21:21:23,327 INFO L78 Accepts]: Start accepts. Automaton has 20841 states and 61776 transitions. Word has length 23 [2021-06-05 21:21:23,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:23,327 INFO L482 AbstractCegarLoop]: Abstraction has 20841 states and 61776 transitions. [2021-06-05 21:21:23,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:23,327 INFO L276 IsEmpty]: Start isEmpty. Operand 20841 states and 61776 transitions. [2021-06-05 21:21:23,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:21:23,342 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:23,342 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:23,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 377 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3088 [2021-06-05 21:21:23,543 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:23,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:23,543 INFO L82 PathProgramCache]: Analyzing trace with hash 145284304, now seen corresponding path program 376 times [2021-06-05 21:21:23,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:23,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949641612] [2021-06-05 21:21:23,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:23,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:23,633 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:23,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:23,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949641612] [2021-06-05 21:21:23,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949641612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:23,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127438931] [2021-06-05 21:21:23,633 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:23,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:21:23,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:23,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:21:23,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:23,707 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:21:23,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127438931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:23,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:23,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 18 [2021-06-05 21:21:23,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645904327] [2021-06-05 21:21:23,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:21:23,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:23,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:21:23,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:21:23,708 INFO L87 Difference]: Start difference. First operand 20841 states and 61776 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:23,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:23,957 INFO L93 Difference]: Finished difference Result 25243 states and 73892 transitions. [2021-06-05 21:21:23,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:21:23,957 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:21:23,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:24,003 INFO L225 Difference]: With dead ends: 25243 [2021-06-05 21:21:24,003 INFO L226 Difference]: Without dead ends: 25237 [2021-06-05 21:21:24,004 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 171.5ms TimeCoverageRelationStatistics Valid=233, Invalid=579, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:21:24,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25237 states. [2021-06-05 21:21:24,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25237 to 20841. [2021-06-05 21:21:24,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20841 states, 20840 states have (on average 2.964011516314779) internal successors, (61770), 20840 states have internal predecessors, (61770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:24,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20841 states to 20841 states and 61770 transitions. [2021-06-05 21:21:24,376 INFO L78 Accepts]: Start accepts. Automaton has 20841 states and 61770 transitions. Word has length 23 [2021-06-05 21:21:24,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:24,377 INFO L482 AbstractCegarLoop]: Abstraction has 20841 states and 61770 transitions. [2021-06-05 21:21:24,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:24,377 INFO L276 IsEmpty]: Start isEmpty. Operand 20841 states and 61770 transitions. [2021-06-05 21:21:24,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:21:24,394 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:24,394 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:24,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3089 [2021-06-05 21:21:24,594 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:24,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:24,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1239375892, now seen corresponding path program 377 times [2021-06-05 21:21:24,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:24,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900563436] [2021-06-05 21:21:24,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:24,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:24,688 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:24,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:24,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900563436] [2021-06-05 21:21:24,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900563436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:24,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12013910] [2021-06-05 21:21:24,688 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:24,713 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:21:24,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:24,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:21:24,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:24,774 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:21:24,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12013910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:24,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:24,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 19 [2021-06-05 21:21:24,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262117616] [2021-06-05 21:21:24,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:21:24,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:24,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:21:24,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:21:24,774 INFO L87 Difference]: Start difference. First operand 20841 states and 61770 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:25,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:25,092 INFO L93 Difference]: Finished difference Result 25260 states and 73908 transitions. [2021-06-05 21:21:25,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:21:25,092 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:21:25,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:25,129 INFO L225 Difference]: With dead ends: 25260 [2021-06-05 21:21:25,130 INFO L226 Difference]: Without dead ends: 25252 [2021-06-05 21:21:25,130 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 191.8ms TimeCoverageRelationStatistics Valid=263, Invalid=667, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:21:25,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25252 states. [2021-06-05 21:21:25,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25252 to 20870. [2021-06-05 21:21:25,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20870 states, 20869 states have (on average 2.9636302649863433) internal successors, (61848), 20869 states have internal predecessors, (61848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:25,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20870 states to 20870 states and 61848 transitions. [2021-06-05 21:21:25,501 INFO L78 Accepts]: Start accepts. Automaton has 20870 states and 61848 transitions. Word has length 23 [2021-06-05 21:21:25,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:25,501 INFO L482 AbstractCegarLoop]: Abstraction has 20870 states and 61848 transitions. [2021-06-05 21:21:25,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:25,501 INFO L276 IsEmpty]: Start isEmpty. Operand 20870 states and 61848 transitions. [2021-06-05 21:21:25,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:21:25,520 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:25,520 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:25,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3090,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:25,720 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:25,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:25,721 INFO L82 PathProgramCache]: Analyzing trace with hash 796476752, now seen corresponding path program 378 times [2021-06-05 21:21:25,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:25,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327934723] [2021-06-05 21:21:25,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:25,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:25,808 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:25,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:25,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327934723] [2021-06-05 21:21:25,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327934723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:25,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894417647] [2021-06-05 21:21:25,809 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:25,833 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:21:25,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:25,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:21:25,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:25,893 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:21:25,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894417647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:25,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:25,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 19 [2021-06-05 21:21:25,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698971724] [2021-06-05 21:21:25,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:21:25,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:25,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:21:25,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:21:25,893 INFO L87 Difference]: Start difference. First operand 20870 states and 61848 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:26,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:26,148 INFO L93 Difference]: Finished difference Result 24954 states and 72952 transitions. [2021-06-05 21:21:26,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:21:26,149 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:21:26,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:26,187 INFO L225 Difference]: With dead ends: 24954 [2021-06-05 21:21:26,187 INFO L226 Difference]: Without dead ends: 24944 [2021-06-05 21:21:26,188 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 188.4ms TimeCoverageRelationStatistics Valid=259, Invalid=671, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:21:26,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24944 states. [2021-06-05 21:21:26,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24944 to 20870. [2021-06-05 21:21:26,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20870 states, 20869 states have (on average 2.963342757199674) internal successors, (61842), 20869 states have internal predecessors, (61842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:26,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20870 states to 20870 states and 61842 transitions. [2021-06-05 21:21:26,550 INFO L78 Accepts]: Start accepts. Automaton has 20870 states and 61842 transitions. Word has length 23 [2021-06-05 21:21:26,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:26,550 INFO L482 AbstractCegarLoop]: Abstraction has 20870 states and 61842 transitions. [2021-06-05 21:21:26,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:26,551 INFO L276 IsEmpty]: Start isEmpty. Operand 20870 states and 61842 transitions. [2021-06-05 21:21:26,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:21:26,569 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:26,569 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:26,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3091,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:26,773 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:26,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:26,773 INFO L82 PathProgramCache]: Analyzing trace with hash -48494700, now seen corresponding path program 379 times [2021-06-05 21:21:26,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:26,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809572225] [2021-06-05 21:21:26,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:26,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:26,867 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:26,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:26,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809572225] [2021-06-05 21:21:26,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809572225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:26,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770412361] [2021-06-05 21:21:26,868 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:26,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:26,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:21:26,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:26,962 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 37 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:21:26,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770412361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:26,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:26,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 20 [2021-06-05 21:21:26,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75101762] [2021-06-05 21:21:26,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:21:26,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:26,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:21:26,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:21:26,963 INFO L87 Difference]: Start difference. First operand 20870 states and 61842 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:27,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:27,244 INFO L93 Difference]: Finished difference Result 24983 states and 72980 transitions. [2021-06-05 21:21:27,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:21:27,244 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:21:27,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:27,283 INFO L225 Difference]: With dead ends: 24983 [2021-06-05 21:21:27,283 INFO L226 Difference]: Without dead ends: 24971 [2021-06-05 21:21:27,283 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 217.9ms TimeCoverageRelationStatistics Valid=293, Invalid=763, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:21:27,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24971 states. [2021-06-05 21:21:27,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24971 to 20967. [2021-06-05 21:21:27,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20967 states, 20966 states have (on average 2.963130783172756) internal successors, (62125), 20966 states have internal predecessors, (62125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:27,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20967 states to 20967 states and 62125 transitions. [2021-06-05 21:21:27,650 INFO L78 Accepts]: Start accepts. Automaton has 20967 states and 62125 transitions. Word has length 23 [2021-06-05 21:21:27,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:27,650 INFO L482 AbstractCegarLoop]: Abstraction has 20967 states and 62125 transitions. [2021-06-05 21:21:27,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:27,650 INFO L276 IsEmpty]: Start isEmpty. Operand 20967 states and 62125 transitions. [2021-06-05 21:21:27,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:21:27,669 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:27,669 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:27,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3092 [2021-06-05 21:21:27,869 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:27,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:27,875 INFO L82 PathProgramCache]: Analyzing trace with hash -472805936, now seen corresponding path program 380 times [2021-06-05 21:21:27,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:27,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178989777] [2021-06-05 21:21:27,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:27,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:27,992 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:27,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:27,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178989777] [2021-06-05 21:21:27,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178989777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:27,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540139976] [2021-06-05 21:21:27,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:28,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:21:28,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:28,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:21:28,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:28,088 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 40 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:21:28,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540139976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:28,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:28,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 20 [2021-06-05 21:21:28,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188393789] [2021-06-05 21:21:28,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 21:21:28,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:28,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 21:21:28,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:21:28,089 INFO L87 Difference]: Start difference. First operand 20967 states and 62125 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:28,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:28,362 INFO L93 Difference]: Finished difference Result 23366 states and 68426 transitions. [2021-06-05 21:21:28,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:21:28,364 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:21:28,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:28,398 INFO L225 Difference]: With dead ends: 23366 [2021-06-05 21:21:28,398 INFO L226 Difference]: Without dead ends: 23352 [2021-06-05 21:21:28,398 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 242.5ms TimeCoverageRelationStatistics Valid=291, Invalid=765, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:21:28,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23352 states. [2021-06-05 21:21:28,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23352 to 20967. [2021-06-05 21:21:28,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20967 states, 20966 states have (on average 2.9630353906324527) internal successors, (62123), 20966 states have internal predecessors, (62123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:28,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20967 states to 20967 states and 62123 transitions. [2021-06-05 21:21:28,811 INFO L78 Accepts]: Start accepts. Automaton has 20967 states and 62123 transitions. Word has length 23 [2021-06-05 21:21:28,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:28,811 INFO L482 AbstractCegarLoop]: Abstraction has 20967 states and 62123 transitions. [2021-06-05 21:21:28,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:28,811 INFO L276 IsEmpty]: Start isEmpty. Operand 20967 states and 62123 transitions. [2021-06-05 21:21:28,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:21:28,832 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:28,832 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:29,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3093,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:29,032 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:29,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:29,033 INFO L82 PathProgramCache]: Analyzing trace with hash -741552364, now seen corresponding path program 381 times [2021-06-05 21:21:29,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:29,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916181979] [2021-06-05 21:21:29,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:29,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:29,134 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:29,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:29,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916181979] [2021-06-05 21:21:29,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916181979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:29,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414768117] [2021-06-05 21:21:29,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:29,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:21:29,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:29,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 21:21:29,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:29,253 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:29,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414768117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:29,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:29,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 21 [2021-06-05 21:21:29,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638452732] [2021-06-05 21:21:29,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 21:21:29,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:29,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 21:21:29,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:21:29,254 INFO L87 Difference]: Start difference. First operand 20967 states and 62123 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:29,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:29,561 INFO L93 Difference]: Finished difference Result 23400 states and 68462 transitions. [2021-06-05 21:21:29,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:21:29,562 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:21:29,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:29,599 INFO L225 Difference]: With dead ends: 23400 [2021-06-05 21:21:29,599 INFO L226 Difference]: Without dead ends: 23384 [2021-06-05 21:21:29,599 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 259.5ms TimeCoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:21:29,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23384 states. [2021-06-05 21:21:29,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23384 to 20978. [2021-06-05 21:21:29,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20978 states, 20977 states have (on average 2.9629594317585926) internal successors, (62154), 20977 states have internal predecessors, (62154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:29,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20978 states to 20978 states and 62154 transitions. [2021-06-05 21:21:29,944 INFO L78 Accepts]: Start accepts. Automaton has 20978 states and 62154 transitions. Word has length 23 [2021-06-05 21:21:29,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:29,944 INFO L482 AbstractCegarLoop]: Abstraction has 20978 states and 62154 transitions. [2021-06-05 21:21:29,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:29,944 INFO L276 IsEmpty]: Start isEmpty. Operand 20978 states and 62154 transitions. [2021-06-05 21:21:29,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:21:29,962 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:29,962 INFO L554 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:30,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3094 [2021-06-05 21:21:30,163 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:30,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:30,163 INFO L82 PathProgramCache]: Analyzing trace with hash -482757040, now seen corresponding path program 382 times [2021-06-05 21:21:30,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:30,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321995271] [2021-06-05 21:21:30,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:30,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:30,269 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:30,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:30,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321995271] [2021-06-05 21:21:30,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321995271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:30,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210755505] [2021-06-05 21:21:30,270 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:30,302 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:21:30,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:30,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:21:30,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:30,399 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 54 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:21:30,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210755505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:30,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:30,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-06-05 21:21:30,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484494508] [2021-06-05 21:21:30,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 21:21:30,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:30,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 21:21:30,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:21:30,400 INFO L87 Difference]: Start difference. First operand 20978 states and 62154 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:30,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:30,656 INFO L93 Difference]: Finished difference Result 21340 states and 63016 transitions. [2021-06-05 21:21:30,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:21:30,657 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:21:30,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:30,682 INFO L225 Difference]: With dead ends: 21340 [2021-06-05 21:21:30,683 INFO L226 Difference]: Without dead ends: 21331 [2021-06-05 21:21:30,683 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 282.6ms TimeCoverageRelationStatistics Valid=322, Invalid=938, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 21:21:30,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21331 states. [2021-06-05 21:21:30,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21331 to 20978. [2021-06-05 21:21:30,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20978 states, 20977 states have (on average 2.962911760499595) internal successors, (62153), 20977 states have internal predecessors, (62153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:30,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20978 states to 20978 states and 62153 transitions. [2021-06-05 21:21:30,990 INFO L78 Accepts]: Start accepts. Automaton has 20978 states and 62153 transitions. Word has length 23 [2021-06-05 21:21:30,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:30,990 INFO L482 AbstractCegarLoop]: Abstraction has 20978 states and 62153 transitions. [2021-06-05 21:21:30,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:30,991 INFO L276 IsEmpty]: Start isEmpty. Operand 20978 states and 62153 transitions. [2021-06-05 21:21:31,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:21:31,008 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:31,008 INFO L554 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:31,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3095 [2021-06-05 21:21:31,208 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:31,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:31,208 INFO L82 PathProgramCache]: Analyzing trace with hash 782455791, now seen corresponding path program 383 times [2021-06-05 21:21:31,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:31,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604596406] [2021-06-05 21:21:31,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:31,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:31,278 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:31,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:31,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604596406] [2021-06-05 21:21:31,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604596406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:31,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889479155] [2021-06-05 21:21:31,278 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:31,331 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:21:31,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:31,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:21:31,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:31,769 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 21:21:31,770 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:21:31,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-05 21:21:32,133 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 148 [2021-06-05 21:21:32,731 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 313 DAG size of output: 295 [2021-06-05 21:21:32,936 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 437 [2021-06-05 21:21:33,682 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 341 [2021-06-05 21:21:34,176 WARN L205 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 774 DAG size of output: 677 [2021-06-05 21:21:34,658 WARN L205 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 796 DAG size of output: 685 [2021-06-05 21:21:35,955 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 407 DAG size of output: 358 [2021-06-05 21:21:36,132 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 361 [2021-06-05 21:21:36,533 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 569 DAG size of output: 479 [2021-06-05 21:21:36,910 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 601 DAG size of output: 509 [2021-06-05 21:21:37,967 WARN L205 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 1270 DAG size of output: 1042 [2021-06-05 21:21:39,765 WARN L205 SmtUtils]: Spent 1.79 s on a formula simplification. DAG size of input: 1270 DAG size of output: 1042 [2021-06-05 21:21:40,970 WARN L205 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 1281 DAG size of output: 1053 [2021-06-05 21:21:42,083 WARN L205 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 1055 DAG size of output: 1466 [2021-06-05 21:21:42,384 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 1050 DAG size of output: 1118 [2021-06-05 21:21:42,843 WARN L205 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 1045 DAG size of output: 1044 [2021-06-05 21:21:43,109 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 471 DAG size of output: 468 [2021-06-05 21:21:43,483 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 465 DAG size of output: 434 [2021-06-05 21:21:43,783 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 425 DAG size of output: 394 [2021-06-05 21:21:44,781 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 457 DAG size of output: 255 [2021-06-05 21:21:44,946 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 474 DAG size of output: 270 [2021-06-05 21:21:45,486 WARN L205 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 687 DAG size of output: 634 [2021-06-05 21:21:45,797 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 631 DAG size of output: 523 [2021-06-05 21:21:46,769 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 503 DAG size of output: 269 [2021-06-05 21:21:47,074 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 514 DAG size of output: 274 [2021-06-05 21:21:47,437 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 843 DAG size of output: 434 [2021-06-05 21:21:47,909 WARN L205 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 931 DAG size of output: 521 [2021-06-05 21:21:48,934 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 1380 DAG size of output: 888 [2021-06-05 21:21:49,839 WARN L205 SmtUtils]: Spent 899.00 ms on a formula simplification. DAG size of input: 1380 DAG size of output: 888 [2021-06-05 21:21:51,282 WARN L205 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 1386 DAG size of output: 895 [2021-06-05 21:21:52,495 WARN L205 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 897 DAG size of output: 597 [2021-06-05 21:21:52,737 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 443 [2021-06-05 21:21:53,018 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 467 [2021-06-05 21:21:53,371 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 279 [2021-06-05 21:21:54,058 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 386 [2021-06-05 21:21:54,440 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 306 [2021-06-05 21:21:55,156 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 227 [2021-06-05 21:21:55,360 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 538 DAG size of output: 292 [2021-06-05 21:21:55,591 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 298 [2021-06-05 21:21:56,937 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 752 DAG size of output: 373 [2021-06-05 21:21:57,394 WARN L205 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 950 DAG size of output: 544 [2021-06-05 21:21:57,850 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 950 DAG size of output: 544 [2021-06-05 21:21:58,478 WARN L205 SmtUtils]: Spent 625.00 ms on a formula simplification. DAG size of input: 957 DAG size of output: 550 [2021-06-05 21:21:58,997 WARN L205 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 549 DAG size of output: 630 [2021-06-05 21:21:59,148 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 238 [2021-06-05 21:21:59,769 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 331 [2021-06-05 21:21:59,895 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 222 [2021-06-05 21:22:00,273 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 301 [2021-06-05 21:22:00,424 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 343 [2021-06-05 21:22:00,574 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 343 [2021-06-05 21:22:00,726 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 445 DAG size of output: 242 [2021-06-05 21:22:01,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:22:01,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:22:01,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:22:01,331 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 21:22:01,335 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:01,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889479155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:01,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:01,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-06-05 21:22:01,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856961922] [2021-06-05 21:22:01,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 21:22:01,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:01,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 21:22:01,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:22:01,336 INFO L87 Difference]: Start difference. First operand 20978 states and 62153 transitions. Second operand has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:01,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:01,761 INFO L93 Difference]: Finished difference Result 21192 states and 62579 transitions. [2021-06-05 21:22:01,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:22:01,761 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:22:01,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:01,789 INFO L225 Difference]: With dead ends: 21192 [2021-06-05 21:22:01,789 INFO L226 Difference]: Without dead ends: 21189 [2021-06-05 21:22:01,789 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 282.3ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:22:01,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21189 states. [2021-06-05 21:22:02,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21189 to 21059. [2021-06-05 21:22:02,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21059 states, 21058 states have (on average 2.9629119574508502) internal successors, (62393), 21058 states have internal predecessors, (62393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:02,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21059 states to 21059 states and 62393 transitions. [2021-06-05 21:22:02,098 INFO L78 Accepts]: Start accepts. Automaton has 21059 states and 62393 transitions. Word has length 24 [2021-06-05 21:22:02,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:02,098 INFO L482 AbstractCegarLoop]: Abstraction has 21059 states and 62393 transitions. [2021-06-05 21:22:02,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:02,099 INFO L276 IsEmpty]: Start isEmpty. Operand 21059 states and 62393 transitions. [2021-06-05 21:22:02,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:22:02,117 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:02,117 INFO L554 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:02,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3096,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:02,317 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:02,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:02,318 INFO L82 PathProgramCache]: Analyzing trace with hash -840131025, now seen corresponding path program 384 times [2021-06-05 21:22:02,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:02,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308939646] [2021-06-05 21:22:02,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:02,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:02,385 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:22:02,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:02,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308939646] [2021-06-05 21:22:02,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308939646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:02,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372025997] [2021-06-05 21:22:02,385 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:02,412 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:22:02,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:02,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:22:02,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:02,844 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 21:22:02,844 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:22:02,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-05 21:22:03,659 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 158 [2021-06-05 21:22:03,950 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 481 DAG size of output: 380 [2021-06-05 21:22:04,144 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 497 DAG size of output: 396 [2021-06-05 21:22:04,380 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 518 DAG size of output: 419 [2021-06-05 21:22:04,668 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 528 DAG size of output: 428 [2021-06-05 21:22:05,387 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 339 [2021-06-05 21:22:06,195 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 399 DAG size of output: 350 [2021-06-05 21:22:06,462 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 686 DAG size of output: 589 [2021-06-05 21:22:06,803 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 700 DAG size of output: 601 [2021-06-05 21:22:07,204 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 720 DAG size of output: 611 [2021-06-05 21:22:07,689 WARN L205 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 730 DAG size of output: 624 [2021-06-05 21:22:08,633 WARN L205 SmtUtils]: Spent 939.00 ms on a formula simplification. DAG size of input: 1119 DAG size of output: 918 [2021-06-05 21:22:09,507 WARN L205 SmtUtils]: Spent 868.00 ms on a formula simplification. DAG size of input: 1119 DAG size of output: 918 [2021-06-05 21:22:10,528 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 1128 DAG size of output: 927 [2021-06-05 21:22:11,416 WARN L205 SmtUtils]: Spent 882.00 ms on a formula simplification. DAG size of input: 929 DAG size of output: 788 [2021-06-05 21:22:11,976 WARN L205 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 634 DAG size of output: 661 [2021-06-05 21:22:12,514 WARN L205 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 577 DAG size of output: 643 [2021-06-05 21:22:12,671 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 502 DAG size of output: 486 [2021-06-05 21:22:13,209 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 468 DAG size of output: 324 [2021-06-05 21:22:13,413 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 382 [2021-06-05 21:22:13,694 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 203 [2021-06-05 21:22:14,317 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 281 [2021-06-05 21:22:14,713 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 671 DAG size of output: 480 [2021-06-05 21:22:15,573 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 252 [2021-06-05 21:22:16,141 WARN L205 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 866 DAG size of output: 528 [2021-06-05 21:22:16,757 WARN L205 SmtUtils]: Spent 611.00 ms on a formula simplification. DAG size of input: 1012 DAG size of output: 622 [2021-06-05 21:22:17,375 WARN L205 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 1012 DAG size of output: 622 [2021-06-05 21:22:18,142 WARN L205 SmtUtils]: Spent 764.00 ms on a formula simplification. DAG size of input: 1024 DAG size of output: 634 [2021-06-05 21:22:18,926 WARN L205 SmtUtils]: Spent 723.00 ms on a formula simplification. DAG size of input: 631 DAG size of output: 668 [2021-06-05 21:22:19,326 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 505 DAG size of output: 512 [2021-06-05 21:22:19,789 WARN L205 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 469 DAG size of output: 496 [2021-06-05 21:22:20,536 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 401 DAG size of output: 496 [2021-06-05 21:22:20,693 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 364 [2021-06-05 21:22:20,983 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 357 [2021-06-05 21:22:21,332 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 412 DAG size of output: 225 [2021-06-05 21:22:21,588 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 508 DAG size of output: 303 [2021-06-05 21:22:21,920 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 553 DAG size of output: 337 [2021-06-05 21:22:22,107 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 320 [2021-06-05 21:22:22,914 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 691 DAG size of output: 398 [2021-06-05 21:22:23,291 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 691 DAG size of output: 398 [2021-06-05 21:22:23,949 WARN L205 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 700 DAG size of output: 468 [2021-06-05 21:22:24,282 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 404 DAG size of output: 400 [2021-06-05 21:22:24,532 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 227 [2021-06-05 21:22:25,106 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 259 [2021-06-05 21:22:25,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:22:25,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:22:25,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:22:25,915 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 21:22:25,921 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:25,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372025997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:25,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:25,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-06-05 21:22:25,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793514973] [2021-06-05 21:22:25,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 21:22:25,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:25,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 21:22:25,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:22:25,922 INFO L87 Difference]: Start difference. First operand 21059 states and 62393 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:26,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:26,228 INFO L93 Difference]: Finished difference Result 21285 states and 62822 transitions. [2021-06-05 21:22:26,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:22:26,229 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:22:26,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:26,259 INFO L225 Difference]: With dead ends: 21285 [2021-06-05 21:22:26,259 INFO L226 Difference]: Without dead ends: 21282 [2021-06-05 21:22:26,259 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 281.6ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:22:26,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21282 states. [2021-06-05 21:22:26,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21282 to 21109. [2021-06-05 21:22:26,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21109 states, 21108 states have (on average 2.9639946939548985) internal successors, (62564), 21108 states have internal predecessors, (62564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:26,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21109 states to 21109 states and 62564 transitions. [2021-06-05 21:22:26,584 INFO L78 Accepts]: Start accepts. Automaton has 21109 states and 62564 transitions. Word has length 24 [2021-06-05 21:22:26,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:26,584 INFO L482 AbstractCegarLoop]: Abstraction has 21109 states and 62564 transitions. [2021-06-05 21:22:26,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:26,584 INFO L276 IsEmpty]: Start isEmpty. Operand 21109 states and 62564 transitions. [2021-06-05 21:22:26,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:22:26,603 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:26,603 INFO L554 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:26,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4419 [2021-06-05 21:22:26,803 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:26,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:26,803 INFO L82 PathProgramCache]: Analyzing trace with hash 156074215, now seen corresponding path program 385 times [2021-06-05 21:22:26,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:26,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180470398] [2021-06-05 21:22:26,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:26,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:26,870 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:22:26,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:26,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180470398] [2021-06-05 21:22:26,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180470398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:26,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331575241] [2021-06-05 21:22:26,870 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:26,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:26,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:22:26,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:27,326 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 21:22:27,327 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:22:27,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-05 21:22:28,049 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 403 DAG size of output: 351 [2021-06-05 21:22:28,203 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 420 DAG size of output: 358 [2021-06-05 21:22:28,395 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 434 DAG size of output: 372 [2021-06-05 21:22:28,623 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 405 [2021-06-05 21:22:29,286 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 244 DAG size of output: 217 [2021-06-05 21:22:29,399 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 374 DAG size of output: 319 [2021-06-05 21:22:29,539 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 328 [2021-06-05 21:22:29,710 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 407 DAG size of output: 342 [2021-06-05 21:22:29,920 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 377 [2021-06-05 21:22:30,397 WARN L205 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 775 DAG size of output: 656 [2021-06-05 21:22:30,876 WARN L205 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 775 DAG size of output: 656 [2021-06-05 21:22:31,492 WARN L205 SmtUtils]: Spent 613.00 ms on a formula simplification. DAG size of input: 784 DAG size of output: 665 [2021-06-05 21:22:32,076 WARN L205 SmtUtils]: Spent 580.00 ms on a formula simplification. DAG size of input: 667 DAG size of output: 655 [2021-06-05 21:22:32,241 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 576 DAG size of output: 536 [2021-06-05 21:22:32,387 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 345 [2021-06-05 21:22:32,535 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 295 [2021-06-05 21:22:32,918 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 272 [2021-06-05 21:22:33,172 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 158 [2021-06-05 21:22:33,658 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 222 [2021-06-05 21:22:34,003 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 394 DAG size of output: 266 [2021-06-05 21:22:34,201 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 407 DAG size of output: 269 [2021-06-05 21:22:34,832 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 704 DAG size of output: 471 [2021-06-05 21:22:35,240 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 181 [2021-06-05 21:22:35,647 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 262 [2021-06-05 21:22:35,751 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 265 [2021-06-05 21:22:36,360 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 249 [2021-06-05 21:22:36,583 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 306 [2021-06-05 21:22:37,282 WARN L205 SmtUtils]: Spent 696.00 ms on a formula simplification. DAG size of input: 924 DAG size of output: 626 [2021-06-05 21:22:37,927 WARN L205 SmtUtils]: Spent 640.00 ms on a formula simplification. DAG size of input: 924 DAG size of output: 626 [2021-06-05 21:22:38,622 WARN L205 SmtUtils]: Spent 692.00 ms on a formula simplification. DAG size of input: 933 DAG size of output: 635 [2021-06-05 21:22:39,767 WARN L205 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 637 DAG size of output: 794 [2021-06-05 21:22:40,590 WARN L205 SmtUtils]: Spent 819.00 ms on a formula simplification. DAG size of input: 524 DAG size of output: 681 [2021-06-05 21:22:41,035 WARN L205 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 468 DAG size of output: 500 [2021-06-05 21:22:41,236 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 455 DAG size of output: 410 [2021-06-05 21:22:41,355 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 249 [2021-06-05 21:22:42,569 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 249 [2021-06-05 21:22:42,763 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 388 DAG size of output: 305 [2021-06-05 21:22:42,869 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 229 [2021-06-05 21:22:43,463 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 177 [2021-06-05 21:22:43,698 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 228 [2021-06-05 21:22:44,578 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 249 [2021-06-05 21:22:44,736 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 281 [2021-06-05 21:22:45,046 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 523 DAG size of output: 396 [2021-06-05 21:22:45,650 WARN L205 SmtUtils]: Spent 601.00 ms on a formula simplification. DAG size of input: 805 DAG size of output: 595 [2021-06-05 21:22:46,822 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 274 [2021-06-05 21:22:48,860 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 1266 DAG size of output: 944 [2021-06-05 21:22:50,168 WARN L205 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 1366 DAG size of output: 988 [2021-06-05 21:22:51,816 WARN L205 SmtUtils]: Spent 1.64 s on a formula simplification. DAG size of input: 1585 DAG size of output: 1151 [2021-06-05 21:22:53,669 WARN L205 SmtUtils]: Spent 1.84 s on a formula simplification. DAG size of input: 1856 DAG size of output: 1314 [2021-06-05 21:22:55,512 WARN L205 SmtUtils]: Spent 1.84 s on a formula simplification. DAG size of input: 1856 DAG size of output: 1314 [2021-06-05 21:22:57,525 WARN L205 SmtUtils]: Spent 2.01 s on a formula simplification. DAG size of input: 1862 DAG size of output: 1320 [2021-06-05 21:22:58,161 WARN L205 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 934 DAG size of output: 951 [2021-06-05 21:22:58,875 WARN L205 SmtUtils]: Spent 708.00 ms on a formula simplification. DAG size of input: 929 DAG size of output: 928 [2021-06-05 21:22:59,259 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 862 DAG size of output: 534 [2021-06-05 21:22:59,909 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 441 DAG size of output: 233 [2021-06-05 21:23:00,139 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 614 DAG size of output: 396 [2021-06-05 21:23:00,751 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 687 DAG size of output: 419 [2021-06-05 21:23:01,031 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 687 DAG size of output: 419 [2021-06-05 21:23:01,346 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 694 DAG size of output: 426 [2021-06-05 21:23:01,635 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 428 DAG size of output: 391 [2021-06-05 21:23:01,970 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 366 [2021-06-05 21:23:02,382 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 205 [2021-06-05 21:23:03,016 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 271 [2021-06-05 21:23:03,165 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 404 DAG size of output: 295 [2021-06-05 21:23:03,355 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 538 DAG size of output: 360 [2021-06-05 21:23:03,571 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 538 DAG size of output: 360 [2021-06-05 21:23:03,764 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 363 [2021-06-05 21:23:03,927 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 201 [2021-06-05 21:23:04,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:23:04,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:23:04,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:23:04,077 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 21:23:04,083 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:23:04,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331575241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:23:04,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:23:04,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-06-05 21:23:04,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907518993] [2021-06-05 21:23:04,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 21:23:04,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:23:04,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 21:23:04,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:23:04,084 INFO L87 Difference]: Start difference. First operand 21109 states and 62564 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:04,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:23:04,429 INFO L93 Difference]: Finished difference Result 21361 states and 63065 transitions. [2021-06-05 21:23:04,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:23:04,430 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:23:04,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:23:04,460 INFO L225 Difference]: With dead ends: 21361 [2021-06-05 21:23:04,460 INFO L226 Difference]: Without dead ends: 21358 [2021-06-05 21:23:04,460 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 279.7ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:23:04,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21358 states. [2021-06-05 21:23:04,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21358 to 21176. [2021-06-05 21:23:04,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21176 states, 21175 states have (on average 2.965383707201889) internal successors, (62792), 21175 states have internal predecessors, (62792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:04,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21176 states to 21176 states and 62792 transitions. [2021-06-05 21:23:04,760 INFO L78 Accepts]: Start accepts. Automaton has 21176 states and 62792 transitions. Word has length 24 [2021-06-05 21:23:04,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:23:04,760 INFO L482 AbstractCegarLoop]: Abstraction has 21176 states and 62792 transitions. [2021-06-05 21:23:04,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:04,760 INFO L276 IsEmpty]: Start isEmpty. Operand 21176 states and 62792 transitions. [2021-06-05 21:23:04,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:23:04,778 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:23:04,778 INFO L554 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:23:04,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 387 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5277 [2021-06-05 21:23:04,978 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:23:04,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:23:04,979 INFO L82 PathProgramCache]: Analyzing trace with hash 973665583, now seen corresponding path program 386 times [2021-06-05 21:23:04,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:23:04,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038912210] [2021-06-05 21:23:04,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:23:04,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:23:05,044 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:23:05,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:23:05,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038912210] [2021-06-05 21:23:05,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038912210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:23:05,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782765470] [2021-06-05 21:23:05,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:23:05,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:23:05,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:23:05,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:23:05,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:23:05,496 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 21:23:05,497 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:23:05,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-05 21:23:06,362 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 420 DAG size of output: 360 [2021-06-05 21:23:06,545 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 443 DAG size of output: 382 [2021-06-05 21:23:06,850 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 465 DAG size of output: 404 [2021-06-05 21:23:07,117 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 484 DAG size of output: 416 [2021-06-05 21:23:08,207 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 325 [2021-06-05 21:23:08,369 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 343 [2021-06-05 21:23:08,625 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 564 DAG size of output: 465 [2021-06-05 21:23:09,013 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 585 DAG size of output: 486 [2021-06-05 21:23:09,402 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 603 DAG size of output: 498 [2021-06-05 21:23:10,172 WARN L205 SmtUtils]: Spent 766.00 ms on a formula simplification. DAG size of input: 950 DAG size of output: 770 [2021-06-05 21:23:10,986 WARN L205 SmtUtils]: Spent 809.00 ms on a formula simplification. DAG size of input: 950 DAG size of output: 770 [2021-06-05 21:23:11,824 WARN L205 SmtUtils]: Spent 835.00 ms on a formula simplification. DAG size of input: 962 DAG size of output: 782 [2021-06-05 21:23:13,059 WARN L205 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 784 DAG size of output: 877 [2021-06-05 21:23:13,540 WARN L205 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 696 DAG size of output: 712 [2021-06-05 21:23:13,964 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 450 DAG size of output: 523 [2021-06-05 21:23:14,086 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 445 DAG size of output: 283 [2021-06-05 21:23:14,739 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 514 DAG size of output: 386 [2021-06-05 21:23:14,908 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 374 DAG size of output: 371 [2021-06-05 21:23:15,662 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 248 [2021-06-05 21:23:15,797 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 257 [2021-06-05 21:23:16,162 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 734 DAG size of output: 546 [2021-06-05 21:23:16,616 WARN L205 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 776 DAG size of output: 588 [2021-06-05 21:23:17,502 WARN L205 SmtUtils]: Spent 881.00 ms on a formula simplification. DAG size of input: 991 DAG size of output: 776 [2021-06-05 21:23:18,324 WARN L205 SmtUtils]: Spent 816.00 ms on a formula simplification. DAG size of input: 991 DAG size of output: 776 [2021-06-05 21:23:19,248 WARN L205 SmtUtils]: Spent 920.00 ms on a formula simplification. DAG size of input: 994 DAG size of output: 780 [2021-06-05 21:23:20,040 WARN L205 SmtUtils]: Spent 787.00 ms on a formula simplification. DAG size of input: 782 DAG size of output: 746 [2021-06-05 21:23:20,479 WARN L205 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 482 DAG size of output: 554 [2021-06-05 21:23:20,886 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 481 DAG size of output: 429 [2021-06-05 21:23:22,154 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 552 DAG size of output: 258 [2021-06-05 21:23:22,300 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 390 DAG size of output: 434 [2021-06-05 21:23:22,412 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 310 [2021-06-05 21:23:22,886 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 137 [2021-06-05 21:23:23,208 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 338 [2021-06-05 21:23:23,313 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 288 [2021-06-05 21:23:24,066 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 242 [2021-06-05 21:23:24,343 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 808 DAG size of output: 385 [2021-06-05 21:23:24,627 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 808 DAG size of output: 385 [2021-06-05 21:23:24,999 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 811 DAG size of output: 392 [2021-06-05 21:23:25,290 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 390 DAG size of output: 452 [2021-06-05 21:23:25,725 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 308 [2021-06-05 21:23:25,863 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 264 [2021-06-05 21:23:26,359 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 245 [2021-06-05 21:23:26,468 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 245 [2021-06-05 21:23:26,658 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 299 [2021-06-05 21:23:27,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:23:27,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:23:27,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:23:27,725 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 21:23:27,731 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:23:27,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782765470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:23:27,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:23:27,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-06-05 21:23:27,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733159729] [2021-06-05 21:23:27,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 21:23:27,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:23:27,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 21:23:27,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:23:27,732 INFO L87 Difference]: Start difference. First operand 21176 states and 62792 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:28,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:23:28,107 INFO L93 Difference]: Finished difference Result 21460 states and 63374 transitions. [2021-06-05 21:23:28,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:23:28,107 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:23:28,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:23:28,133 INFO L225 Difference]: With dead ends: 21460 [2021-06-05 21:23:28,133 INFO L226 Difference]: Without dead ends: 21457 [2021-06-05 21:23:28,133 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 275.4ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:23:28,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21457 states. [2021-06-05 21:23:28,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21457 to 21256. [2021-06-05 21:23:28,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21256 states, 21255 states have (on average 2.967254763585039) internal successors, (63069), 21255 states have internal predecessors, (63069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:28,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21256 states to 21256 states and 63069 transitions. [2021-06-05 21:23:28,450 INFO L78 Accepts]: Start accepts. Automaton has 21256 states and 63069 transitions. Word has length 24 [2021-06-05 21:23:28,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:23:28,451 INFO L482 AbstractCegarLoop]: Abstraction has 21256 states and 63069 transitions. [2021-06-05 21:23:28,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:28,451 INFO L276 IsEmpty]: Start isEmpty. Operand 21256 states and 63069 transitions. [2021-06-05 21:23:28,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:23:28,469 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:23:28,469 INFO L554 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:23:28,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7738,388 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:23:28,670 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:23:28,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:23:28,670 INFO L82 PathProgramCache]: Analyzing trace with hash 549194215, now seen corresponding path program 387 times [2021-06-05 21:23:28,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:23:28,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000853512] [2021-06-05 21:23:28,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:23:28,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:23:28,736 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:23:28,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:23:28,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000853512] [2021-06-05 21:23:28,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000853512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:23:28,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270125379] [2021-06-05 21:23:28,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:23:28,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 21:23:28,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:23:28,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:23:28,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:23:29,191 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 21:23:29,191 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:23:29,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-05 21:23:30,499 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 330 [2021-06-05 21:23:30,627 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 435 DAG size of output: 340 [2021-06-05 21:23:30,789 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 441 DAG size of output: 346 [2021-06-05 21:23:31,073 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 583 DAG size of output: 458 [2021-06-05 21:23:31,422 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 618 DAG size of output: 490 [2021-06-05 21:23:31,778 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 618 DAG size of output: 490 [2021-06-05 21:23:32,176 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 629 DAG size of output: 501 [2021-06-05 21:23:32,792 WARN L205 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 503 DAG size of output: 659 [2021-06-05 21:23:32,909 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 500 DAG size of output: 552 [2021-06-05 21:23:33,359 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 497 DAG size of output: 624 [2021-06-05 21:23:33,572 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 491 DAG size of output: 491 [2021-06-05 21:23:34,478 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 215 [2021-06-05 21:23:34,646 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 546 DAG size of output: 370 [2021-06-05 21:23:34,914 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 457 DAG size of output: 453 [2021-06-05 21:23:35,900 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 291 [2021-06-05 21:23:36,075 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 461 DAG size of output: 294 [2021-06-05 21:23:36,568 WARN L205 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 959 DAG size of output: 615 [2021-06-05 21:23:37,077 WARN L205 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 1122 DAG size of output: 703 [2021-06-05 21:23:37,710 WARN L205 SmtUtils]: Spent 628.00 ms on a formula simplification. DAG size of input: 1197 DAG size of output: 753 [2021-06-05 21:23:38,617 WARN L205 SmtUtils]: Spent 901.00 ms on a formula simplification. DAG size of input: 1412 DAG size of output: 864 [2021-06-05 21:23:39,424 WARN L205 SmtUtils]: Spent 801.00 ms on a formula simplification. DAG size of input: 1412 DAG size of output: 864 [2021-06-05 21:23:40,255 WARN L205 SmtUtils]: Spent 827.00 ms on a formula simplification. DAG size of input: 1418 DAG size of output: 870 [2021-06-05 21:23:41,219 WARN L205 SmtUtils]: Spent 957.00 ms on a formula simplification. DAG size of input: 872 DAG size of output: 996 [2021-06-05 21:23:41,512 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 450 DAG size of output: 236 [2021-06-05 21:23:41,978 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 258 [2021-06-05 21:23:42,945 WARN L205 SmtUtils]: Spent 962.00 ms on a formula simplification. DAG size of input: 814 DAG size of output: 794 [2021-06-05 21:23:43,474 WARN L205 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 508 DAG size of output: 519 [2021-06-05 21:23:43,962 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 410 [2021-06-05 21:23:44,144 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 220 [2021-06-05 21:23:44,531 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 394 DAG size of output: 238 [2021-06-05 21:23:44,816 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 344 [2021-06-05 21:23:45,252 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 462 DAG size of output: 266 [2021-06-05 21:23:45,534 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 696 DAG size of output: 386 [2021-06-05 21:23:45,976 WARN L205 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 863 DAG size of output: 462 [2021-06-05 21:23:46,479 WARN L205 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 863 DAG size of output: 462 [2021-06-05 21:23:46,976 WARN L205 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 869 DAG size of output: 469 [2021-06-05 21:23:47,357 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 471 DAG size of output: 413 [2021-06-05 21:23:47,686 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 385 [2021-06-05 21:23:47,844 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 256 [2021-06-05 21:23:48,448 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 191 [2021-06-05 21:23:49,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:23:49,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:23:49,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:23:49,516 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 21:23:49,522 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:23:49,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270125379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:23:49,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:23:49,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-06-05 21:23:49,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426638109] [2021-06-05 21:23:49,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 21:23:49,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:23:49,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 21:23:49,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:23:49,523 INFO L87 Difference]: Start difference. First operand 21256 states and 63069 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:49,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:23:49,867 INFO L93 Difference]: Finished difference Result 21580 states and 63776 transitions. [2021-06-05 21:23:49,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:23:49,867 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:23:49,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:23:49,892 INFO L225 Difference]: With dead ends: 21580 [2021-06-05 21:23:49,892 INFO L226 Difference]: Without dead ends: 21577 [2021-06-05 21:23:49,893 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 276.4ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:23:49,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21577 states. [2021-06-05 21:23:50,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21577 to 21367. [2021-06-05 21:23:50,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21367 states, 21366 states have (on average 2.9702798839277356) internal successors, (63463), 21366 states have internal predecessors, (63463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:50,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21367 states to 21367 states and 63463 transitions. [2021-06-05 21:23:50,200 INFO L78 Accepts]: Start accepts. Automaton has 21367 states and 63463 transitions. Word has length 24 [2021-06-05 21:23:50,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:23:50,200 INFO L482 AbstractCegarLoop]: Abstraction has 21367 states and 63463 transitions. [2021-06-05 21:23:50,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:50,200 INFO L276 IsEmpty]: Start isEmpty. Operand 21367 states and 63463 transitions. [2021-06-05 21:23:50,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:23:50,218 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:23:50,218 INFO L554 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:23:50,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8931,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:23:50,419 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:23:50,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:23:50,419 INFO L82 PathProgramCache]: Analyzing trace with hash 275483695, now seen corresponding path program 388 times [2021-06-05 21:23:50,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:23:50,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789989775] [2021-06-05 21:23:50,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:23:50,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:23:50,486 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:23:50,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:23:50,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789989775] [2021-06-05 21:23:50,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789989775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:23:50,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060824058] [2021-06-05 21:23:50,487 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:23:50,511 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:23:50,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:23:50,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:23:50,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:23:50,941 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 21:23:50,941 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:23:50,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-05 21:23:51,759 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 258 [2021-06-05 21:23:51,974 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 278 [2021-06-05 21:23:52,127 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 431 DAG size of output: 299 [2021-06-05 21:23:52,281 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 431 DAG size of output: 299 [2021-06-05 21:23:52,466 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 446 DAG size of output: 314 [2021-06-05 21:23:52,693 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 354 [2021-06-05 21:23:52,823 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 210 [2021-06-05 21:23:53,691 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 213 [2021-06-05 21:23:54,025 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 254 [2021-06-05 21:23:54,259 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 436 DAG size of output: 347 [2021-06-05 21:23:54,677 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 501 DAG size of output: 387 [2021-06-05 21:23:54,825 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 253 DAG size of output: 321 [2021-06-05 21:23:55,029 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 246 [2021-06-05 21:23:55,888 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 116 [2021-06-05 21:23:56,109 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 203 [2021-06-05 21:23:56,232 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 206 [2021-06-05 21:23:56,369 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 265 [2021-06-05 21:23:56,547 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 282 [2021-06-05 21:23:56,757 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 263 [2021-06-05 21:23:57,073 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 515 DAG size of output: 374 [2021-06-05 21:23:57,686 WARN L205 SmtUtils]: Spent 610.00 ms on a formula simplification. DAG size of input: 853 DAG size of output: 595 [2021-06-05 21:23:58,407 WARN L205 SmtUtils]: Spent 716.00 ms on a formula simplification. DAG size of input: 853 DAG size of output: 595 [2021-06-05 21:23:59,087 WARN L205 SmtUtils]: Spent 677.00 ms on a formula simplification. DAG size of input: 860 DAG size of output: 602 [2021-06-05 21:23:59,809 WARN L205 SmtUtils]: Spent 717.00 ms on a formula simplification. DAG size of input: 604 DAG size of output: 658 [2021-06-05 21:24:00,233 WARN L205 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 457 DAG size of output: 529 [2021-06-05 21:24:00,730 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 201 [2021-06-05 21:24:00,990 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 326 [2021-06-05 21:24:01,511 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 464 DAG size of output: 306 [2021-06-05 21:24:01,993 WARN L205 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 460 [2021-06-05 21:24:02,174 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 280 [2021-06-05 21:24:02,885 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 289 [2021-06-05 21:24:03,669 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 313 [2021-06-05 21:24:04,104 WARN L205 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 828 DAG size of output: 494 [2021-06-05 21:24:04,471 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 828 DAG size of output: 494 [2021-06-05 21:24:04,880 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 830 DAG size of output: 497 [2021-06-05 21:24:05,295 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 499 DAG size of output: 540 [2021-06-05 21:24:05,866 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 252 [2021-06-05 21:24:06,051 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 433 DAG size of output: 318 [2021-06-05 21:24:06,237 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 433 DAG size of output: 318 [2021-06-05 21:24:06,446 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 438 DAG size of output: 324 [2021-06-05 21:24:06,557 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 342 [2021-06-05 21:24:06,747 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 348 [2021-06-05 21:24:07,585 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 434 DAG size of output: 294 [2021-06-05 21:24:07,706 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 434 DAG size of output: 294 [2021-06-05 21:24:07,942 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 439 DAG size of output: 241 [2021-06-05 21:24:08,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:24:08,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:24:08,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:24:08,056 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 21:24:08,062 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:08,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060824058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:08,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:08,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-06-05 21:24:08,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365608532] [2021-06-05 21:24:08,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 21:24:08,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:08,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 21:24:08,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:24:08,063 INFO L87 Difference]: Start difference. First operand 21367 states and 63463 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:08,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:08,551 INFO L93 Difference]: Finished difference Result 21704 states and 64205 transitions. [2021-06-05 21:24:08,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:24:08,551 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:24:08,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:08,582 INFO L225 Difference]: With dead ends: 21704 [2021-06-05 21:24:08,582 INFO L226 Difference]: Without dead ends: 21701 [2021-06-05 21:24:08,582 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 277.5ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:24:08,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21701 states. [2021-06-05 21:24:08,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21701 to 21484. [2021-06-05 21:24:08,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21484 states, 21483 states have (on average 2.973746683424103) internal successors, (63885), 21483 states have internal predecessors, (63885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:08,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21484 states to 21484 states and 63885 transitions. [2021-06-05 21:24:08,932 INFO L78 Accepts]: Start accepts. Automaton has 21484 states and 63885 transitions. Word has length 24 [2021-06-05 21:24:08,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:08,932 INFO L482 AbstractCegarLoop]: Abstraction has 21484 states and 63885 transitions. [2021-06-05 21:24:08,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:08,932 INFO L276 IsEmpty]: Start isEmpty. Operand 21484 states and 63885 transitions. [2021-06-05 21:24:08,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:24:08,951 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:08,951 INFO L554 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:09,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9870 [2021-06-05 21:24:09,152 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:09,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:09,152 INFO L82 PathProgramCache]: Analyzing trace with hash 380392167, now seen corresponding path program 389 times [2021-06-05 21:24:09,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:09,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676808183] [2021-06-05 21:24:09,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:09,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:09,218 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:24:09,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:09,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676808183] [2021-06-05 21:24:09,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676808183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:09,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109156886] [2021-06-05 21:24:09,218 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:09,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:24:09,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:09,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:24:09,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:09,677 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 21:24:09,677 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:24:09,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-05 21:24:10,472 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 429 DAG size of output: 315 [2021-06-05 21:24:10,644 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 452 DAG size of output: 339 [2021-06-05 21:24:11,245 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 580 DAG size of output: 425 [2021-06-05 21:24:11,692 WARN L205 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 601 DAG size of output: 445 [2021-06-05 21:24:12,061 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 621 DAG size of output: 466 [2021-06-05 21:24:12,432 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 621 DAG size of output: 466 [2021-06-05 21:24:12,865 WARN L205 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 636 DAG size of output: 481 [2021-06-05 21:24:13,282 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 483 DAG size of output: 611 [2021-06-05 21:24:13,854 WARN L205 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 477 DAG size of output: 605 [2021-06-05 21:24:14,031 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 330 [2021-06-05 21:24:15,494 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 260 [2021-06-05 21:24:15,638 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 271 [2021-06-05 21:24:15,923 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 470 DAG size of output: 386 [2021-06-05 21:24:16,283 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 506 DAG size of output: 423 [2021-06-05 21:24:17,404 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 309 DAG size of output: 263 [2021-06-05 21:24:17,713 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 286 [2021-06-05 21:24:17,958 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 444 DAG size of output: 344 [2021-06-05 21:24:18,277 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 490 DAG size of output: 380 [2021-06-05 21:24:19,022 WARN L205 SmtUtils]: Spent 742.00 ms on a formula simplification. DAG size of input: 850 DAG size of output: 662 [2021-06-05 21:24:20,053 WARN L205 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 976 DAG size of output: 744 [2021-06-05 21:24:21,448 WARN L205 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 1212 DAG size of output: 935 [2021-06-05 21:24:21,634 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 332 [2021-06-05 21:24:22,892 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 279 [2021-06-05 21:24:23,185 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 388 DAG size of output: 319 [2021-06-05 21:24:23,639 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 341 [2021-06-05 21:24:24,021 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 478 DAG size of output: 374 [2021-06-05 21:24:25,179 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 286 DAG size of output: 286 [2021-06-05 21:24:25,402 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 328 [2021-06-05 21:24:25,766 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 392 DAG size of output: 367 [2021-06-05 21:24:26,501 WARN L205 SmtUtils]: Spent 732.00 ms on a formula simplification. DAG size of input: 730 DAG size of output: 617 [2021-06-05 21:24:27,322 WARN L205 SmtUtils]: Spent 817.00 ms on a formula simplification. DAG size of input: 733 DAG size of output: 620 [2021-06-05 21:24:29,793 WARN L205 SmtUtils]: Spent 2.47 s on a formula simplification. DAG size of input: 1662 DAG size of output: 1295 [2021-06-05 21:24:32,225 WARN L205 SmtUtils]: Spent 2.42 s on a formula simplification. DAG size of input: 1662 DAG size of output: 1295 [2021-06-05 21:24:34,923 WARN L205 SmtUtils]: Spent 2.69 s on a formula simplification. DAG size of input: 1669 DAG size of output: 1302 [2021-06-05 21:24:38,205 WARN L205 SmtUtils]: Spent 3.27 s on a formula simplification. DAG size of input: 1304 DAG size of output: 1641 [2021-06-05 21:24:39,002 WARN L205 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 519 DAG size of output: 518 [2021-06-05 21:24:39,188 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 358 [2021-06-05 21:24:40,245 WARN L205 SmtUtils]: Spent 695.00 ms on a formula simplification. DAG size of input: 632 DAG size of output: 526 [2021-06-05 21:24:40,471 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 402 DAG size of output: 338 [2021-06-05 21:24:40,616 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 285 DAG size of output: 248 [2021-06-05 21:24:41,091 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 411 DAG size of output: 225 [2021-06-05 21:24:41,352 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 617 DAG size of output: 295 [2021-06-05 21:24:41,548 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 617 DAG size of output: 295 [2021-06-05 21:24:41,756 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 620 DAG size of output: 297 [2021-06-05 21:24:42,544 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 972 DAG size of output: 470 [2021-06-05 21:24:42,954 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 293 [2021-06-05 21:24:43,546 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 455 DAG size of output: 291 [2021-06-05 21:24:43,664 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 455 DAG size of output: 291 [2021-06-05 21:24:43,796 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 295 [2021-06-05 21:24:43,948 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 249 [2021-06-05 21:24:44,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:24:44,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:24:44,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:24:44,496 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 21:24:44,501 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:44,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109156886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:44,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:44,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-06-05 21:24:44,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008390796] [2021-06-05 21:24:44,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 21:24:44,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:44,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 21:24:44,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:24:44,502 INFO L87 Difference]: Start difference. First operand 21484 states and 63885 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:44,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:44,984 INFO L93 Difference]: Finished difference Result 21935 states and 64985 transitions. [2021-06-05 21:24:44,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:24:44,984 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:24:44,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:45,013 INFO L225 Difference]: With dead ends: 21935 [2021-06-05 21:24:45,013 INFO L226 Difference]: Without dead ends: 21932 [2021-06-05 21:24:45,013 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 276.9ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:24:45,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21932 states. [2021-06-05 21:24:45,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21932 to 21709. [2021-06-05 21:24:45,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21709 states, 21708 states have (on average 2.9790399852588907) internal successors, (64669), 21708 states have internal predecessors, (64669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:45,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21709 states to 21709 states and 64669 transitions. [2021-06-05 21:24:45,343 INFO L78 Accepts]: Start accepts. Automaton has 21709 states and 64669 transitions. Word has length 24 [2021-06-05 21:24:45,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:45,344 INFO L482 AbstractCegarLoop]: Abstraction has 21709 states and 64669 transitions. [2021-06-05 21:24:45,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:45,344 INFO L276 IsEmpty]: Start isEmpty. Operand 21709 states and 64669 transitions. [2021-06-05 21:24:45,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:24:45,363 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:45,363 INFO L554 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:45,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 391 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11112 [2021-06-05 21:24:45,564 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:45,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:45,564 INFO L82 PathProgramCache]: Analyzing trace with hash -662412497, now seen corresponding path program 390 times [2021-06-05 21:24:45,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:45,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746971795] [2021-06-05 21:24:45,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:45,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:45,629 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:24:45,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:45,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746971795] [2021-06-05 21:24:45,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746971795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:45,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209045246] [2021-06-05 21:24:45,630 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:45,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:24:45,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:45,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:24:45,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:46,087 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 21:24:46,088 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:24:46,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-05 21:24:46,699 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 246 [2021-06-05 21:24:47,405 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 499 DAG size of output: 350 [2021-06-05 21:24:47,606 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 519 DAG size of output: 370 [2021-06-05 21:24:47,850 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 387 [2021-06-05 21:24:48,089 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 387 [2021-06-05 21:24:48,360 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 548 DAG size of output: 396 [2021-06-05 21:24:48,634 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 404 [2021-06-05 21:24:50,154 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 327 [2021-06-05 21:24:50,288 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 336 [2021-06-05 21:24:50,566 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 605 DAG size of output: 522 [2021-06-05 21:24:51,052 WARN L205 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 873 DAG size of output: 706 [2021-06-05 21:24:51,218 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 398 [2021-06-05 21:24:51,373 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 429 [2021-06-05 21:24:51,552 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 355 [2021-06-05 21:24:52,476 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 464 DAG size of output: 277 [2021-06-05 21:24:52,622 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 484 DAG size of output: 289 [2021-06-05 21:24:52,899 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 583 DAG size of output: 342 [2021-06-05 21:24:53,803 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 838 DAG size of output: 532 [2021-06-05 21:24:54,286 WARN L205 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 887 DAG size of output: 560 [2021-06-05 21:24:55,380 WARN L205 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 1676 DAG size of output: 1187 [2021-06-05 21:24:56,578 WARN L205 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 1712 DAG size of output: 1211 [2021-06-05 21:24:57,825 WARN L205 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 1712 DAG size of output: 1211 [2021-06-05 21:24:59,241 WARN L205 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 1718 DAG size of output: 1220 [2021-06-05 21:25:01,142 WARN L205 SmtUtils]: Spent 1.89 s on a formula simplification. DAG size of input: 1222 DAG size of output: 1489 [2021-06-05 21:25:03,454 WARN L205 SmtUtils]: Spent 2.30 s on a formula simplification. DAG size of input: 1124 DAG size of output: 1154 [2021-06-05 21:25:04,273 WARN L205 SmtUtils]: Spent 813.00 ms on a formula simplification. DAG size of input: 744 DAG size of output: 817 [2021-06-05 21:25:05,084 WARN L205 SmtUtils]: Spent 806.00 ms on a formula simplification. DAG size of input: 436 DAG size of output: 534 [2021-06-05 21:25:05,637 WARN L205 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 407 DAG size of output: 495 [2021-06-05 21:25:05,996 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 423 [2021-06-05 21:25:06,239 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 325 [2021-06-05 21:25:06,489 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 325 [2021-06-05 21:25:06,676 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 225 [2021-06-05 21:25:07,325 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 226 [2021-06-05 21:25:08,173 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 455 DAG size of output: 323 [2021-06-05 21:25:09,477 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 291 [2021-06-05 21:25:09,967 WARN L205 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 706 DAG size of output: 519 [2021-06-05 21:25:10,167 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 336 [2021-06-05 21:25:10,992 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 199 [2021-06-05 21:25:11,579 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 258 DAG size of output: 227 [2021-06-05 21:25:12,263 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 290 [2021-06-05 21:25:12,698 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 492 DAG size of output: 395 [2021-06-05 21:25:12,950 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 250 DAG size of output: 302 [2021-06-05 21:25:13,970 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 214 [2021-06-05 21:25:14,166 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 262 [2021-06-05 21:25:14,989 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 221 [2021-06-05 21:25:15,395 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 277 [2021-06-05 21:25:15,816 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 547 DAG size of output: 443 [2021-06-05 21:25:16,716 WARN L205 SmtUtils]: Spent 896.00 ms on a formula simplification. DAG size of input: 890 DAG size of output: 689 [2021-06-05 21:25:18,388 WARN L205 SmtUtils]: Spent 1.67 s on a formula simplification. DAG size of input: 1320 DAG size of output: 996 [2021-06-05 21:25:20,056 WARN L205 SmtUtils]: Spent 1.64 s on a formula simplification. DAG size of input: 1342 DAG size of output: 1007 [2021-06-05 21:25:22,095 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 1463 DAG size of output: 1096 [2021-06-05 21:25:24,244 WARN L205 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 1605 DAG size of output: 1168 [2021-06-05 21:25:27,107 WARN L205 SmtUtils]: Spent 2.86 s on a formula simplification. DAG size of input: 1995 DAG size of output: 1476 [2021-06-05 21:25:30,710 WARN L205 SmtUtils]: Spent 3.59 s on a formula simplification. DAG size of input: 2414 DAG size of output: 1726 [2021-06-05 21:25:35,220 WARN L205 SmtUtils]: Spent 4.50 s on a formula simplification. DAG size of input: 2846 DAG size of output: 1951 [2021-06-05 21:25:39,705 WARN L205 SmtUtils]: Spent 4.47 s on a formula simplification. DAG size of input: 2846 DAG size of output: 1951 [2021-06-05 21:25:44,533 WARN L205 SmtUtils]: Spent 4.82 s on a formula simplification. DAG size of input: 2852 DAG size of output: 1957 [2021-06-05 21:25:50,869 WARN L205 SmtUtils]: Spent 6.32 s on a formula simplification. DAG size of input: 1959 DAG size of output: 2569 [2021-06-05 21:25:51,768 WARN L205 SmtUtils]: Spent 888.00 ms on a formula simplification. DAG size of input: 1698 DAG size of output: 808 [2021-06-05 21:25:52,209 WARN L205 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 488 DAG size of output: 452 [2021-06-05 21:25:52,806 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 379 DAG size of output: 232 [2021-06-05 21:25:53,075 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 682 DAG size of output: 377 [2021-06-05 21:25:54,313 WARN L205 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 1785 DAG size of output: 947 [2021-06-05 21:25:55,532 WARN L205 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 1785 DAG size of output: 947 [2021-06-05 21:25:56,821 WARN L205 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 1790 DAG size of output: 952 [2021-06-05 21:25:57,338 WARN L205 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 676 DAG size of output: 433 [2021-06-05 21:25:58,496 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 378 [2021-06-05 21:25:59,184 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 255 [2021-06-05 21:25:59,314 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 255 [2021-06-05 21:25:59,489 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 259 [2021-06-05 21:25:59,612 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 257 [2021-06-05 21:25:59,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:25:59,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:25:59,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:25:59,895 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 21:25:59,901 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:59,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209045246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:59,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:59,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-06-05 21:25:59,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199127567] [2021-06-05 21:25:59,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 21:25:59,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:59,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 21:25:59,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:25:59,902 INFO L87 Difference]: Start difference. First operand 21709 states and 64669 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:00,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:00,260 INFO L93 Difference]: Finished difference Result 22176 states and 65792 transitions. [2021-06-05 21:26:00,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:26:00,260 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:26:00,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:00,288 INFO L225 Difference]: With dead ends: 22176 [2021-06-05 21:26:00,288 INFO L226 Difference]: Without dead ends: 22173 [2021-06-05 21:26:00,289 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 276.0ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:26:00,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22173 states. [2021-06-05 21:26:00,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22173 to 21946. [2021-06-05 21:26:00,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21946 states, 21945 states have (on average 2.983732057416268) internal successors, (65478), 21945 states have internal predecessors, (65478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:00,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21946 states to 21946 states and 65478 transitions. [2021-06-05 21:26:00,633 INFO L78 Accepts]: Start accepts. Automaton has 21946 states and 65478 transitions. Word has length 24 [2021-06-05 21:26:00,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:00,633 INFO L482 AbstractCegarLoop]: Abstraction has 21946 states and 65478 transitions. [2021-06-05 21:26:00,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:00,633 INFO L276 IsEmpty]: Start isEmpty. Operand 21946 states and 65478 transitions. [2021-06-05 21:26:00,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:26:00,652 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:00,652 INFO L554 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:00,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12515 [2021-06-05 21:26:00,853 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:00,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:00,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1370381287, now seen corresponding path program 391 times [2021-06-05 21:26:00,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:00,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258926057] [2021-06-05 21:26:00,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:00,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:00,919 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:26:00,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:00,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258926057] [2021-06-05 21:26:00,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258926057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:00,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672970167] [2021-06-05 21:26:00,919 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:00,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:00,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:26:00,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:01,377 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 21:26:01,378 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:26:01,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-05 21:26:02,621 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 254 [2021-06-05 21:26:02,857 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 274 [2021-06-05 21:26:03,113 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 479 DAG size of output: 335 [2021-06-05 21:26:03,369 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 479 DAG size of output: 335 [2021-06-05 21:26:03,686 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 494 DAG size of output: 351 [2021-06-05 21:26:04,240 WARN L205 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 422 [2021-06-05 21:26:05,160 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 197 [2021-06-05 21:26:05,287 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 200 [2021-06-05 21:26:05,447 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 213 [2021-06-05 21:26:05,640 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 234 [2021-06-05 21:26:06,327 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 242 [2021-06-05 21:26:06,648 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 330 [2021-06-05 21:26:06,948 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 370 [2021-06-05 21:26:07,375 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 369 [2021-06-05 21:26:08,034 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 241 [2021-06-05 21:26:08,212 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 246 [2021-06-05 21:26:08,879 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 184 [2021-06-05 21:26:09,130 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 234 [2021-06-05 21:26:09,709 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 240 [2021-06-05 21:26:09,980 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 448 DAG size of output: 332 [2021-06-05 21:26:10,358 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 535 DAG size of output: 401 [2021-06-05 21:26:10,787 WARN L205 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 598 DAG size of output: 461 [2021-06-05 21:26:11,360 WARN L205 SmtUtils]: Spent 569.00 ms on a formula simplification. DAG size of input: 693 DAG size of output: 515 [2021-06-05 21:26:12,324 WARN L205 SmtUtils]: Spent 959.00 ms on a formula simplification. DAG size of input: 847 DAG size of output: 607 [2021-06-05 21:26:13,503 WARN L205 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 901 DAG size of output: 655 [2021-06-05 21:26:15,103 WARN L205 SmtUtils]: Spent 1.60 s on a formula simplification. DAG size of input: 1179 DAG size of output: 795 [2021-06-05 21:26:16,709 WARN L205 SmtUtils]: Spent 1.60 s on a formula simplification. DAG size of input: 1179 DAG size of output: 795 [2021-06-05 21:26:18,454 WARN L205 SmtUtils]: Spent 1.74 s on a formula simplification. DAG size of input: 1190 DAG size of output: 806 [2021-06-05 21:26:19,661 WARN L205 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 804 DAG size of output: 823 [2021-06-05 21:26:20,341 WARN L205 SmtUtils]: Spent 674.00 ms on a formula simplification. DAG size of input: 665 DAG size of output: 637 [2021-06-05 21:26:21,160 WARN L205 SmtUtils]: Spent 815.00 ms on a formula simplification. DAG size of input: 532 DAG size of output: 651 [2021-06-05 21:26:21,666 WARN L205 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 422 DAG size of output: 488 [2021-06-05 21:26:21,990 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 402 DAG size of output: 271 [2021-06-05 21:26:22,198 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 307 [2021-06-05 21:26:22,685 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 537 DAG size of output: 360 [2021-06-05 21:26:23,100 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 468 [2021-06-05 21:26:23,581 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 266 [2021-06-05 21:26:23,717 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 220 [2021-06-05 21:26:24,082 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 332 [2021-06-05 21:26:24,585 WARN L205 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 838 DAG size of output: 516 [2021-06-05 21:26:25,189 WARN L205 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 935 DAG size of output: 579 [2021-06-05 21:26:25,421 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 246 [2021-06-05 21:26:25,620 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 204 [2021-06-05 21:26:26,596 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 190 [2021-06-05 21:26:27,328 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 249 [2021-06-05 21:26:27,526 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 258 [2021-06-05 21:26:28,268 WARN L205 SmtUtils]: Spent 738.00 ms on a formula simplification. DAG size of input: 1137 DAG size of output: 684 [2021-06-05 21:26:29,076 WARN L205 SmtUtils]: Spent 803.00 ms on a formula simplification. DAG size of input: 1137 DAG size of output: 684 [2021-06-05 21:26:30,153 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 1143 DAG size of output: 758 [2021-06-05 21:26:30,682 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 549 DAG size of output: 437 [2021-06-05 21:26:30,987 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 433 DAG size of output: 377 [2021-06-05 21:26:31,532 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 379 DAG size of output: 242 [2021-06-05 21:26:31,897 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 811 DAG size of output: 479 [2021-06-05 21:26:32,263 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 811 DAG size of output: 479 [2021-06-05 21:26:32,730 WARN L205 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 813 DAG size of output: 481 [2021-06-05 21:26:33,150 WARN L205 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 483 DAG size of output: 569 [2021-06-05 21:26:33,419 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 475 DAG size of output: 394 [2021-06-05 21:26:33,543 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 260 [2021-06-05 21:26:33,857 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 320 [2021-06-05 21:26:34,619 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 560 DAG size of output: 246 [2021-06-05 21:26:34,790 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 560 DAG size of output: 246 [2021-06-05 21:26:34,944 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 564 DAG size of output: 250 [2021-06-05 21:26:35,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:26:35,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:26:35,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:26:35,146 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 21:26:35,151 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:35,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672970167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:35,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:35,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-06-05 21:26:35,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056560517] [2021-06-05 21:26:35,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 21:26:35,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:35,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 21:26:35,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:26:35,152 INFO L87 Difference]: Start difference. First operand 21946 states and 65478 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:35,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:35,566 INFO L93 Difference]: Finished difference Result 23670 states and 70444 transitions. [2021-06-05 21:26:35,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:26:35,566 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:26:35,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:35,600 INFO L225 Difference]: With dead ends: 23670 [2021-06-05 21:26:35,600 INFO L226 Difference]: Without dead ends: 23667 [2021-06-05 21:26:35,600 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 278.6ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:26:35,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23667 states. [2021-06-05 21:26:35,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23667 to 23451. [2021-06-05 21:26:35,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23451 states, 23450 states have (on average 2.99181236673774) internal successors, (70158), 23450 states have internal predecessors, (70158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:35,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23451 states to 23451 states and 70158 transitions. [2021-06-05 21:26:35,973 INFO L78 Accepts]: Start accepts. Automaton has 23451 states and 70158 transitions. Word has length 24 [2021-06-05 21:26:35,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:35,974 INFO L482 AbstractCegarLoop]: Abstraction has 23451 states and 70158 transitions. [2021-06-05 21:26:35,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:35,974 INFO L276 IsEmpty]: Start isEmpty. Operand 23451 states and 70158 transitions. [2021-06-05 21:26:35,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:26:35,995 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:35,995 INFO L554 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:36,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15472,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:36,195 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:36,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:36,196 INFO L82 PathProgramCache]: Analyzing trace with hash -37520849, now seen corresponding path program 392 times [2021-06-05 21:26:36,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:36,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201220229] [2021-06-05 21:26:36,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:36,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:36,279 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:36,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:36,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201220229] [2021-06-05 21:26:36,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201220229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:36,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589997460] [2021-06-05 21:26:36,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:36,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:26:36,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:36,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:26:36,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:36,749 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 21:26:36,749 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:26:36,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-05 21:26:37,481 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 276 [2021-06-05 21:26:37,596 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 276 [2021-06-05 21:26:37,734 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 291 [2021-06-05 21:26:37,959 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 288 [2021-06-05 21:26:38,218 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 282 [2021-06-05 21:26:38,415 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 254 [2021-06-05 21:26:39,481 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 198 [2021-06-05 21:26:39,695 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 271 [2021-06-05 21:26:40,136 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 381 DAG size of output: 315 [2021-06-05 21:26:40,594 WARN L205 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 411 DAG size of output: 341 [2021-06-05 21:26:41,023 WARN L205 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 450 DAG size of output: 369 [2021-06-05 21:26:41,529 WARN L205 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 376 [2021-06-05 21:26:42,174 WARN L205 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 492 DAG size of output: 399 [2021-06-05 21:26:42,365 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 223 [2021-06-05 21:26:43,816 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 240 [2021-06-05 21:26:44,058 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 306 [2021-06-05 21:26:44,446 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 545 DAG size of output: 356 [2021-06-05 21:26:44,854 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 619 DAG size of output: 423 [2021-06-05 21:26:45,336 WARN L205 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 626 DAG size of output: 430 [2021-06-05 21:26:45,929 WARN L205 SmtUtils]: Spent 590.00 ms on a formula simplification. DAG size of input: 670 DAG size of output: 466 [2021-06-05 21:26:46,679 WARN L205 SmtUtils]: Spent 747.00 ms on a formula simplification. DAG size of input: 709 DAG size of output: 496 [2021-06-05 21:26:48,037 WARN L205 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 1004 DAG size of output: 698 [2021-06-05 21:26:49,624 WARN L205 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 1052 DAG size of output: 715 [2021-06-05 21:26:51,209 WARN L205 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 1052 DAG size of output: 715 [2021-06-05 21:26:52,904 WARN L205 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 1059 DAG size of output: 722 [2021-06-05 21:26:53,700 WARN L205 SmtUtils]: Spent 790.00 ms on a formula simplification. DAG size of input: 724 DAG size of output: 433 [2021-06-05 21:26:54,142 WARN L205 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 408 DAG size of output: 342 [2021-06-05 21:26:54,355 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 332 [2021-06-05 21:26:54,610 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 238 [2021-06-05 21:26:55,228 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 231 [2021-06-05 21:26:55,354 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 231 [2021-06-05 21:26:55,485 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 374 DAG size of output: 231 [2021-06-05 21:26:56,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:26:56,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:26:56,029 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:26:56,030 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 21:26:56,035 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:26:56,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589997460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:56,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:26:56,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-06-05 21:26:56,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909682723] [2021-06-05 21:26:56,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 21:26:56,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:26:56,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 21:26:56,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:26:56,036 INFO L87 Difference]: Start difference. First operand 23451 states and 70158 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:56,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:26:56,383 INFO L93 Difference]: Finished difference Result 29480 states and 87930 transitions. [2021-06-05 21:26:56,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:26:56,384 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:26:56,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:26:56,431 INFO L225 Difference]: With dead ends: 29480 [2021-06-05 21:26:56,432 INFO L226 Difference]: Without dead ends: 29477 [2021-06-05 21:26:56,432 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 292.1ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:26:56,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29477 states. [2021-06-05 21:26:56,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29477 to 29259. [2021-06-05 21:26:56,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29259 states, 29258 states have (on average 2.995830200287101) internal successors, (87652), 29258 states have internal predecessors, (87652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:56,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29259 states to 29259 states and 87652 transitions. [2021-06-05 21:26:56,913 INFO L78 Accepts]: Start accepts. Automaton has 29259 states and 87652 transitions. Word has length 24 [2021-06-05 21:26:56,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:26:56,913 INFO L482 AbstractCegarLoop]: Abstraction has 29259 states and 87652 transitions. [2021-06-05 21:26:56,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:26:56,913 INFO L276 IsEmpty]: Start isEmpty. Operand 29259 states and 87652 transitions. [2021-06-05 21:26:56,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 21:26:56,942 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:26:56,942 INFO L554 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:26:57,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16711,394 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:57,143 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:26:57,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:26:57,143 INFO L82 PathProgramCache]: Analyzing trace with hash -732814105, now seen corresponding path program 393 times [2021-06-05 21:26:57,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:26:57,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622318372] [2021-06-05 21:26:57,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:26:57,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:26:57,210 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:26:57,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:26:57,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622318372] [2021-06-05 21:26:57,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622318372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:26:57,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405503491] [2021-06-05 21:26:57,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:26:57,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:26:57,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:26:57,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 21:26:57,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:26:57,673 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 21:26:57,673 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:26:57,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-05 21:26:58,278 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 343 [2021-06-05 21:26:58,420 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 351 [2021-06-05 21:26:59,042 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 336 [2021-06-05 21:26:59,500 WARN L205 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 614 DAG size of output: 559 [2021-06-05 21:27:00,046 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 309 [2021-06-05 21:27:00,560 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 321 [2021-06-05 21:27:00,684 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 336 [2021-06-05 21:27:00,958 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 577 DAG size of output: 525 [2021-06-05 21:27:01,763 WARN L205 SmtUtils]: Spent 802.00 ms on a formula simplification. DAG size of input: 1056 DAG size of output: 946 [2021-06-05 21:27:02,352 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 390 DAG size of output: 353 [2021-06-05 21:27:02,482 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 370 [2021-06-05 21:27:03,280 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 665 DAG size of output: 595 [2021-06-05 21:27:03,444 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 104 [2021-06-05 21:27:04,156 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 438 DAG size of output: 400 [2021-06-05 21:27:04,321 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 456 DAG size of output: 414 [2021-06-05 21:27:04,907 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 390 DAG size of output: 353 [2021-06-05 21:27:05,034 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 369 [2021-06-05 21:27:05,401 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 749 DAG size of output: 666 [2021-06-05 21:27:06,284 WARN L205 SmtUtils]: Spent 878.00 ms on a formula simplification. DAG size of input: 1296 DAG size of output: 1127 [2021-06-05 21:27:08,098 WARN L205 SmtUtils]: Spent 1.81 s on a formula simplification. DAG size of input: 2221 DAG size of output: 1934 [2021-06-05 21:27:10,034 WARN L205 SmtUtils]: Spent 1.93 s on a formula simplification. DAG size of input: 2221 DAG size of output: 1934 [2021-06-05 21:27:12,071 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 2236 DAG size of output: 1949 [2021-06-05 21:27:13,173 WARN L205 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 1943 DAG size of output: 1870 [2021-06-05 21:27:13,701 WARN L205 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 953 DAG size of output: 1006 [2021-06-05 21:27:14,588 WARN L205 SmtUtils]: Spent 881.00 ms on a formula simplification. DAG size of input: 946 DAG size of output: 1093 [2021-06-05 21:27:15,270 WARN L205 SmtUtils]: Spent 675.00 ms on a formula simplification. DAG size of input: 888 DAG size of output: 792 [2021-06-05 21:27:15,546 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 766 DAG size of output: 748 [2021-06-05 21:27:15,892 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 450 DAG size of output: 450 [2021-06-05 21:27:16,027 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 329 [2021-06-05 21:27:16,634 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 344 [2021-06-05 21:27:16,743 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 278 [2021-06-05 21:27:17,499 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 537 DAG size of output: 317 [2021-06-05 21:27:17,695 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 556 DAG size of output: 335 [2021-06-05 21:27:18,110 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 268 [2021-06-05 21:27:18,921 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 450 DAG size of output: 267 [2021-06-05 21:27:19,294 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 880 DAG size of output: 518 [2021-06-05 21:27:19,767 WARN L205 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 911 DAG size of output: 550 [2021-06-05 21:27:20,546 WARN L205 SmtUtils]: Spent 775.00 ms on a formula simplification. DAG size of input: 1111 DAG size of output: 698 [2021-06-05 21:27:21,388 WARN L205 SmtUtils]: Spent 837.00 ms on a formula simplification. DAG size of input: 1185 DAG size of output: 735 [2021-06-05 21:27:21,648 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 1039 DAG size of output: 1023 [2021-06-05 21:27:22,153 WARN L205 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 616 DAG size of output: 721 [2021-06-05 21:27:22,439 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 395 [2021-06-05 21:27:22,606 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 361 [2021-06-05 21:27:22,824 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 383 [2021-06-05 21:27:23,540 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 456 DAG size of output: 283 [2021-06-05 21:27:23,696 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 290 [2021-06-05 21:27:23,827 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 327 [2021-06-05 21:27:24,776 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 742 DAG size of output: 394 [2021-06-05 21:27:25,136 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 895 DAG size of output: 523 [2021-06-05 21:27:25,484 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 513 DAG size of output: 598 [2021-06-05 21:27:25,757 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 486 DAG size of output: 497 [2021-06-05 21:27:25,909 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 310 [2021-06-05 21:27:26,023 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 328 [2021-06-05 21:27:27,108 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 600 DAG size of output: 342 [2021-06-05 21:27:27,719 WARN L205 SmtUtils]: Spent 608.00 ms on a formula simplification. DAG size of input: 1295 DAG size of output: 662 [2021-06-05 21:27:29,466 WARN L205 SmtUtils]: Spent 1.74 s on a formula simplification. DAG size of input: 2272 DAG size of output: 1239 [2021-06-05 21:27:31,224 WARN L205 SmtUtils]: Spent 1.75 s on a formula simplification. DAG size of input: 2272 DAG size of output: 1239 [2021-06-05 21:27:33,328 WARN L205 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 2280 DAG size of output: 1250 [2021-06-05 21:27:34,522 WARN L205 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 1141 DAG size of output: 1073 [2021-06-05 21:27:35,117 WARN L205 SmtUtils]: Spent 588.00 ms on a formula simplification. DAG size of input: 1038 DAG size of output: 977 [2021-06-05 21:27:35,299 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 437 [2021-06-05 21:27:36,940 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 344 [2021-06-05 21:27:37,214 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 923 DAG size of output: 404 [2021-06-05 21:27:37,577 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 947 DAG size of output: 425 [2021-06-05 21:27:38,115 WARN L205 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 1093 DAG size of output: 539 [2021-06-05 21:27:38,623 WARN L205 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 1093 DAG size of output: 539 [2021-06-05 21:27:39,185 WARN L205 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 1097 DAG size of output: 547 [2021-06-05 21:27:40,200 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 549 DAG size of output: 644 [2021-06-05 21:27:41,015 WARN L205 SmtUtils]: Spent 811.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 503 [2021-06-05 21:27:41,949 WARN L205 SmtUtils]: Spent 929.00 ms on a formula simplification. DAG size of input: 466 DAG size of output: 558 [2021-06-05 21:27:42,178 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 342 [2021-06-05 21:27:42,433 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 288 [2021-06-05 21:27:43,471 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 405 DAG size of output: 322 [2021-06-05 21:27:43,680 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 304 [2021-06-05 21:27:43,843 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 255 [2021-06-05 21:27:44,610 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 187 [2021-06-05 21:27:44,935 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 684 DAG size of output: 420 [2021-06-05 21:27:45,702 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 846 DAG size of output: 494 [2021-06-05 21:27:46,206 WARN L205 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 973 DAG size of output: 581 [2021-06-05 21:27:46,724 WARN L205 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 973 DAG size of output: 581 [2021-06-05 21:27:47,262 WARN L205 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 975 DAG size of output: 581 [2021-06-05 21:27:47,627 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 580 DAG size of output: 515 [2021-06-05 21:27:47,916 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 410 DAG size of output: 351 [2021-06-05 21:27:48,465 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 217 [2021-06-05 21:27:48,577 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 228 [2021-06-05 21:27:48,787 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 21:27:48,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 21:27:48,788 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 21:27:48,789 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 21:27:48,794 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:48,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405503491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:48,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:48,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-06-05 21:27:48,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211073980] [2021-06-05 21:27:48,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 21:27:48,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:48,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 21:27:48,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:27:48,795 INFO L87 Difference]: Start difference. First operand 29259 states and 87652 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:49,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:49,243 INFO L93 Difference]: Finished difference Result 34712 states and 103669 transitions. [2021-06-05 21:27:49,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:27:49,243 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 21:27:49,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:49,302 INFO L225 Difference]: With dead ends: 34712 [2021-06-05 21:27:49,302 INFO L226 Difference]: Without dead ends: 34709 [2021-06-05 21:27:49,302 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 286.6ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:27:49,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34709 states. [2021-06-05 21:27:49,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34709 to 34499. [2021-06-05 21:27:49,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34499 states, 34498 states have (on average 2.997362165922662) internal successors, (103403), 34498 states have internal predecessors, (103403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:49,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34499 states to 34499 states and 103403 transitions. [2021-06-05 21:27:49,903 INFO L78 Accepts]: Start accepts. Automaton has 34499 states and 103403 transitions. Word has length 24 [2021-06-05 21:27:49,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:49,903 INFO L482 AbstractCegarLoop]: Abstraction has 34499 states and 103403 transitions. [2021-06-05 21:27:49,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:49,904 INFO L276 IsEmpty]: Start isEmpty. Operand 34499 states and 103403 transitions. [2021-06-05 21:27:49,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:27:49,940 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:49,940 INFO L554 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:50,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17630,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:50,141 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:50,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:50,141 INFO L82 PathProgramCache]: Analyzing trace with hash -569566705, now seen corresponding path program 394 times [2021-06-05 21:27:50,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:50,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441175767] [2021-06-05 21:27:50,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:50,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:50,257 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:50,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:50,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441175767] [2021-06-05 21:27:50,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441175767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:50,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955395244] [2021-06-05 21:27:50,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:50,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:27:50,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:27:50,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:27:50,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:50,335 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 55 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:50,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955395244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:50,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:50,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-05 21:27:50,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530160256] [2021-06-05 21:27:50,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:27:50,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:50,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:27:50,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:27:50,336 INFO L87 Difference]: Start difference. First operand 34499 states and 103403 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:50,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:50,661 INFO L93 Difference]: Finished difference Result 34720 states and 103729 transitions. [2021-06-05 21:27:50,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:27:50,662 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:27:50,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:50,721 INFO L225 Difference]: With dead ends: 34720 [2021-06-05 21:27:50,721 INFO L226 Difference]: Without dead ends: 34720 [2021-06-05 21:27:50,721 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 238.7ms TimeCoverageRelationStatistics Valid=412, Invalid=848, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 21:27:50,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34720 states. [2021-06-05 21:27:51,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34720 to 34459. [2021-06-05 21:27:51,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34459 states, 34458 states have (on average 2.9970398746299844) internal successors, (103272), 34458 states have internal predecessors, (103272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:51,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34459 states to 34459 states and 103272 transitions. [2021-06-05 21:27:51,272 INFO L78 Accepts]: Start accepts. Automaton has 34459 states and 103272 transitions. Word has length 25 [2021-06-05 21:27:51,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:51,272 INFO L482 AbstractCegarLoop]: Abstraction has 34459 states and 103272 transitions. [2021-06-05 21:27:51,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:51,272 INFO L276 IsEmpty]: Start isEmpty. Operand 34459 states and 103272 transitions. [2021-06-05 21:27:51,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:27:51,309 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:51,309 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:51,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20196,396 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:51,509 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:51,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:51,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1490602554, now seen corresponding path program 395 times [2021-06-05 21:27:51,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:51,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101787710] [2021-06-05 21:27:51,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:51,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:51,630 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:51,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:51,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101787710] [2021-06-05 21:27:51,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101787710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:51,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720882040] [2021-06-05 21:27:51,630 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:51,657 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:27:51,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:27:51,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:27:51,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:51,702 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:51,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720882040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:51,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:51,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-05 21:27:51,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957524708] [2021-06-05 21:27:51,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:27:51,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:51,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:27:51,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:27:51,703 INFO L87 Difference]: Start difference. First operand 34459 states and 103272 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:52,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:52,156 INFO L93 Difference]: Finished difference Result 35093 states and 104240 transitions. [2021-06-05 21:27:52,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 21:27:52,156 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:27:52,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:52,206 INFO L225 Difference]: With dead ends: 35093 [2021-06-05 21:27:52,206 INFO L226 Difference]: Without dead ends: 35080 [2021-06-05 21:27:52,206 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 287.4ms TimeCoverageRelationStatistics Valid=542, Invalid=1098, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 21:27:52,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35080 states. [2021-06-05 21:27:52,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35080 to 34497. [2021-06-05 21:27:52,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34497 states, 34496 states have (on average 2.996173469387755) internal successors, (103356), 34496 states have internal predecessors, (103356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:52,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34497 states to 34497 states and 103356 transitions. [2021-06-05 21:27:52,774 INFO L78 Accepts]: Start accepts. Automaton has 34497 states and 103356 transitions. Word has length 25 [2021-06-05 21:27:52,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:52,774 INFO L482 AbstractCegarLoop]: Abstraction has 34497 states and 103356 transitions. [2021-06-05 21:27:52,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:52,774 INFO L276 IsEmpty]: Start isEmpty. Operand 34497 states and 103356 transitions. [2021-06-05 21:27:52,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:27:52,802 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:52,802 INFO L554 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:53,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20197 [2021-06-05 21:27:53,003 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:53,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:53,003 INFO L82 PathProgramCache]: Analyzing trace with hash -446698831, now seen corresponding path program 396 times [2021-06-05 21:27:53,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:53,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625664856] [2021-06-05 21:27:53,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:53,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:53,081 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 47 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:53,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:53,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625664856] [2021-06-05 21:27:53,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625664856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:53,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763809332] [2021-06-05 21:27:53,081 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:53,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:27:53,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:27:53,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:27:53,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:53,148 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 56 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:53,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763809332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:53,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:53,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:27:53,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460004022] [2021-06-05 21:27:53,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:27:53,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:53,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:27:53,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:27:53,149 INFO L87 Difference]: Start difference. First operand 34497 states and 103356 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:53,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:53,398 INFO L93 Difference]: Finished difference Result 34544 states and 103423 transitions. [2021-06-05 21:27:53,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:27:53,399 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:27:53,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:53,445 INFO L225 Difference]: With dead ends: 34544 [2021-06-05 21:27:53,445 INFO L226 Difference]: Without dead ends: 34543 [2021-06-05 21:27:53,445 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 127.9ms TimeCoverageRelationStatistics Valid=237, Invalid=413, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:27:53,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34543 states. [2021-06-05 21:27:53,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34543 to 34497. [2021-06-05 21:27:53,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34497 states, 34496 states have (on average 2.996115491651206) internal successors, (103354), 34496 states have internal predecessors, (103354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:53,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34497 states to 34497 states and 103354 transitions. [2021-06-05 21:27:53,983 INFO L78 Accepts]: Start accepts. Automaton has 34497 states and 103354 transitions. Word has length 25 [2021-06-05 21:27:53,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:53,983 INFO L482 AbstractCegarLoop]: Abstraction has 34497 states and 103354 transitions. [2021-06-05 21:27:53,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:53,983 INFO L276 IsEmpty]: Start isEmpty. Operand 34497 states and 103354 transitions. [2021-06-05 21:27:54,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:27:54,024 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:54,024 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:54,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20198,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:54,225 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:54,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:54,225 INFO L82 PathProgramCache]: Analyzing trace with hash 470357522, now seen corresponding path program 397 times [2021-06-05 21:27:54,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:54,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848593445] [2021-06-05 21:27:54,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:54,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:54,302 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:54,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:54,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848593445] [2021-06-05 21:27:54,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848593445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:54,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688023587] [2021-06-05 21:27:54,303 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:54,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:54,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:27:54,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:54,374 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:54,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688023587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:54,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:54,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:27:54,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440475041] [2021-06-05 21:27:54,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:27:54,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:54,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:27:54,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:27:54,375 INFO L87 Difference]: Start difference. First operand 34497 states and 103354 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:54,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:54,532 INFO L93 Difference]: Finished difference Result 35864 states and 106497 transitions. [2021-06-05 21:27:54,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:27:54,533 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:27:54,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:54,585 INFO L225 Difference]: With dead ends: 35864 [2021-06-05 21:27:54,586 INFO L226 Difference]: Without dead ends: 35864 [2021-06-05 21:27:54,586 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 77.0ms TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:27:54,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35864 states. [2021-06-05 21:27:55,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35864 to 34468. [2021-06-05 21:27:55,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34468 states, 34467 states have (on average 2.9955029448457946) internal successors, (103246), 34467 states have internal predecessors, (103246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:55,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34468 states to 34468 states and 103246 transitions. [2021-06-05 21:27:55,254 INFO L78 Accepts]: Start accepts. Automaton has 34468 states and 103246 transitions. Word has length 25 [2021-06-05 21:27:55,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:55,254 INFO L482 AbstractCegarLoop]: Abstraction has 34468 states and 103246 transitions. [2021-06-05 21:27:55,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:55,254 INFO L276 IsEmpty]: Start isEmpty. Operand 34468 states and 103246 transitions. [2021-06-05 21:27:55,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:27:55,282 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:55,283 INFO L554 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:55,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20199 [2021-06-05 21:27:55,483 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:55,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:55,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1195948281, now seen corresponding path program 398 times [2021-06-05 21:27:55,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:55,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445228772] [2021-06-05 21:27:55,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:55,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:55,554 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 29 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:55,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:55,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445228772] [2021-06-05 21:27:55,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445228772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:55,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207900395] [2021-06-05 21:27:55,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:55,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:27:55,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:27:55,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:27:55,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:55,625 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 37 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:27:55,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207900395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:55,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:55,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:27:55,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885739152] [2021-06-05 21:27:55,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:27:55,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:55,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:27:55,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:27:55,625 INFO L87 Difference]: Start difference. First operand 34468 states and 103246 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:55,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:55,867 INFO L93 Difference]: Finished difference Result 34958 states and 104173 transitions. [2021-06-05 21:27:55,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:27:55,868 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:27:55,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:55,923 INFO L225 Difference]: With dead ends: 34958 [2021-06-05 21:27:55,923 INFO L226 Difference]: Without dead ends: 34958 [2021-06-05 21:27:55,923 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 119.5ms TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:27:55,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34958 states. [2021-06-05 21:27:56,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34958 to 34515. [2021-06-05 21:27:56,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34515 states, 34514 states have (on average 2.995624963782813) internal successors, (103391), 34514 states have internal predecessors, (103391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:56,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34515 states to 34515 states and 103391 transitions. [2021-06-05 21:27:56,459 INFO L78 Accepts]: Start accepts. Automaton has 34515 states and 103391 transitions. Word has length 25 [2021-06-05 21:27:56,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:56,459 INFO L482 AbstractCegarLoop]: Abstraction has 34515 states and 103391 transitions. [2021-06-05 21:27:56,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:56,460 INFO L276 IsEmpty]: Start isEmpty. Operand 34515 states and 103391 transitions. [2021-06-05 21:27:56,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:27:56,489 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:56,489 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:56,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20200 [2021-06-05 21:27:56,690 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:56,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:56,690 INFO L82 PathProgramCache]: Analyzing trace with hash -251186298, now seen corresponding path program 399 times [2021-06-05 21:27:56,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:56,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230794416] [2021-06-05 21:27:56,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:56,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:56,759 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 32 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:56,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:56,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230794416] [2021-06-05 21:27:56,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230794416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:56,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657067360] [2021-06-05 21:27:56,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:56,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:27:56,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:27:56,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:27:56,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:56,827 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 33 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:27:56,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657067360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:56,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:56,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:27:56,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838252053] [2021-06-05 21:27:56,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:27:56,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:56,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:27:56,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:27:56,828 INFO L87 Difference]: Start difference. First operand 34515 states and 103391 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:57,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:57,101 INFO L93 Difference]: Finished difference Result 35079 states and 104228 transitions. [2021-06-05 21:27:57,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:27:57,102 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:27:57,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:57,159 INFO L225 Difference]: With dead ends: 35079 [2021-06-05 21:27:57,159 INFO L226 Difference]: Without dead ends: 35077 [2021-06-05 21:27:57,159 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 138.4ms TimeCoverageRelationStatistics Valid=246, Invalid=404, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:27:57,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35077 states. [2021-06-05 21:27:57,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35077 to 34527. [2021-06-05 21:27:57,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34527 states, 34526 states have (on average 2.9958292301453975) internal successors, (103434), 34526 states have internal predecessors, (103434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:57,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34527 states to 34527 states and 103434 transitions. [2021-06-05 21:27:57,741 INFO L78 Accepts]: Start accepts. Automaton has 34527 states and 103434 transitions. Word has length 25 [2021-06-05 21:27:57,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:57,741 INFO L482 AbstractCegarLoop]: Abstraction has 34527 states and 103434 transitions. [2021-06-05 21:27:57,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:57,741 INFO L276 IsEmpty]: Start isEmpty. Operand 34527 states and 103434 transitions. [2021-06-05 21:27:57,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:27:57,777 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:57,777 INFO L554 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:57,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 401 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20201 [2021-06-05 21:27:57,977 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:57,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:57,977 INFO L82 PathProgramCache]: Analyzing trace with hash 549506409, now seen corresponding path program 400 times [2021-06-05 21:27:57,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:57,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889182721] [2021-06-05 21:27:57,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:57,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:58,049 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 39 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:58,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:58,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889182721] [2021-06-05 21:27:58,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889182721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:58,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640316019] [2021-06-05 21:27:58,049 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:58,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:27:58,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:27:58,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:27:58,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:58,114 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 47 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:58,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640316019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:58,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:58,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:27:58,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587900977] [2021-06-05 21:27:58,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:27:58,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:58,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:27:58,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:27:58,115 INFO L87 Difference]: Start difference. First operand 34527 states and 103434 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:58,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:58,412 INFO L93 Difference]: Finished difference Result 34780 states and 103823 transitions. [2021-06-05 21:27:58,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:27:58,412 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:27:58,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:58,475 INFO L225 Difference]: With dead ends: 34780 [2021-06-05 21:27:58,475 INFO L226 Difference]: Without dead ends: 34778 [2021-06-05 21:27:58,475 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 130.5ms TimeCoverageRelationStatistics Valid=238, Invalid=412, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:27:58,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34778 states. [2021-06-05 21:27:58,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34778 to 34497. [2021-06-05 21:27:58,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34497 states, 34496 states have (on average 2.9955936920222634) internal successors, (103336), 34496 states have internal predecessors, (103336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:59,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34497 states to 34497 states and 103336 transitions. [2021-06-05 21:27:59,053 INFO L78 Accepts]: Start accepts. Automaton has 34497 states and 103336 transitions. Word has length 25 [2021-06-05 21:27:59,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:27:59,053 INFO L482 AbstractCegarLoop]: Abstraction has 34497 states and 103336 transitions. [2021-06-05 21:27:59,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:59,054 INFO L276 IsEmpty]: Start isEmpty. Operand 34497 states and 103336 transitions. [2021-06-05 21:27:59,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:27:59,084 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:27:59,084 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:27:59,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 402 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20202 [2021-06-05 21:27:59,285 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:27:59,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:27:59,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1466562762, now seen corresponding path program 401 times [2021-06-05 21:27:59,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:27:59,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472696409] [2021-06-05 21:27:59,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:27:59,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:27:59,353 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 29 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:59,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:27:59,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472696409] [2021-06-05 21:27:59,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472696409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:59,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723367603] [2021-06-05 21:27:59,354 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:27:59,380 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:27:59,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:27:59,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:27:59,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:27:59,426 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:27:59,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723367603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:27:59,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:27:59,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:27:59,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300407792] [2021-06-05 21:27:59,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:27:59,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:27:59,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:27:59,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:27:59,427 INFO L87 Difference]: Start difference. First operand 34497 states and 103336 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:27:59,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:27:59,597 INFO L93 Difference]: Finished difference Result 35545 states and 105444 transitions. [2021-06-05 21:27:59,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:27:59,597 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:27:59,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:27:59,656 INFO L225 Difference]: With dead ends: 35545 [2021-06-05 21:27:59,656 INFO L226 Difference]: Without dead ends: 35545 [2021-06-05 21:27:59,656 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 69.3ms TimeCoverageRelationStatistics Valid=106, Invalid=134, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:27:59,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35545 states. [2021-06-05 21:28:00,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35545 to 34502. [2021-06-05 21:28:00,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34502 states, 34501 states have (on average 2.995536361264891) internal successors, (103349), 34501 states have internal predecessors, (103349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:00,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34502 states to 34502 states and 103349 transitions. [2021-06-05 21:28:00,247 INFO L78 Accepts]: Start accepts. Automaton has 34502 states and 103349 transitions. Word has length 25 [2021-06-05 21:28:00,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:00,247 INFO L482 AbstractCegarLoop]: Abstraction has 34502 states and 103349 transitions. [2021-06-05 21:28:00,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:00,247 INFO L276 IsEmpty]: Start isEmpty. Operand 34502 states and 103349 transitions. [2021-06-05 21:28:00,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:28:00,283 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:00,283 INFO L554 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:00,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 403 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20203 [2021-06-05 21:28:00,483 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:00,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:00,484 INFO L82 PathProgramCache]: Analyzing trace with hash -2034847579, now seen corresponding path program 402 times [2021-06-05 21:28:00,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:00,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250868803] [2021-06-05 21:28:00,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:00,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:00,560 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 40 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:00,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:00,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250868803] [2021-06-05 21:28:00,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250868803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:00,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981973281] [2021-06-05 21:28:00,560 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:00,587 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:28:00,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:00,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:28:00,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:00,632 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 48 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:00,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981973281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:00,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:00,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:28:00,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139329487] [2021-06-05 21:28:00,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:28:00,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:00,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:28:00,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:28:00,633 INFO L87 Difference]: Start difference. First operand 34502 states and 103349 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:00,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:00,980 INFO L93 Difference]: Finished difference Result 34731 states and 103707 transitions. [2021-06-05 21:28:00,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:28:00,981 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:28:00,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:01,037 INFO L225 Difference]: With dead ends: 34731 [2021-06-05 21:28:01,037 INFO L226 Difference]: Without dead ends: 34729 [2021-06-05 21:28:01,037 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 148.4ms TimeCoverageRelationStatistics Valid=267, Invalid=489, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:28:01,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34729 states. [2021-06-05 21:28:01,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34729 to 34502. [2021-06-05 21:28:01,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34502 states, 34501 states have (on average 2.9954783919306687) internal successors, (103347), 34501 states have internal predecessors, (103347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:01,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34502 states to 34502 states and 103347 transitions. [2021-06-05 21:28:01,584 INFO L78 Accepts]: Start accepts. Automaton has 34502 states and 103347 transitions. Word has length 25 [2021-06-05 21:28:01,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:01,584 INFO L482 AbstractCegarLoop]: Abstraction has 34502 states and 103347 transitions. [2021-06-05 21:28:01,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:01,584 INFO L276 IsEmpty]: Start isEmpty. Operand 34502 states and 103347 transitions. [2021-06-05 21:28:01,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:28:01,618 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:01,618 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:01,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 404 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20204 [2021-06-05 21:28:01,819 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:01,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:01,819 INFO L82 PathProgramCache]: Analyzing trace with hash -262484572, now seen corresponding path program 403 times [2021-06-05 21:28:01,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:01,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422418405] [2021-06-05 21:28:01,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:01,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:01,890 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:01,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:01,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422418405] [2021-06-05 21:28:01,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422418405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:01,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625436414] [2021-06-05 21:28:01,891 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:01,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:01,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:28:01,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:01,966 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:01,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625436414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:01,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:01,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:28:01,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058804500] [2021-06-05 21:28:01,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:28:01,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:01,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:28:01,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:28:01,966 INFO L87 Difference]: Start difference. First operand 34502 states and 103347 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:02,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:02,237 INFO L93 Difference]: Finished difference Result 37216 states and 110229 transitions. [2021-06-05 21:28:02,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:28:02,237 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:28:02,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:02,298 INFO L225 Difference]: With dead ends: 37216 [2021-06-05 21:28:02,298 INFO L226 Difference]: Without dead ends: 37216 [2021-06-05 21:28:02,298 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 86.4ms TimeCoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:28:02,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37216 states. [2021-06-05 21:28:02,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37216 to 34471. [2021-06-05 21:28:02,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34471 states, 34470 states have (on average 2.9948651000870323) internal successors, (103233), 34470 states have internal predecessors, (103233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:02,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34471 states to 34471 states and 103233 transitions. [2021-06-05 21:28:02,895 INFO L78 Accepts]: Start accepts. Automaton has 34471 states and 103233 transitions. Word has length 25 [2021-06-05 21:28:02,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:02,895 INFO L482 AbstractCegarLoop]: Abstraction has 34471 states and 103233 transitions. [2021-06-05 21:28:02,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:02,895 INFO L276 IsEmpty]: Start isEmpty. Operand 34471 states and 103233 transitions. [2021-06-05 21:28:02,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:28:02,930 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:02,930 INFO L554 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:03,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20205,405 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:03,131 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:03,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:03,131 INFO L82 PathProgramCache]: Analyzing trace with hash -378356913, now seen corresponding path program 404 times [2021-06-05 21:28:03,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:03,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238709824] [2021-06-05 21:28:03,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:03,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:03,202 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:03,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:03,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238709824] [2021-06-05 21:28:03,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238709824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:03,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636578917] [2021-06-05 21:28:03,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:03,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:28:03,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:03,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:28:03,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:03,274 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 31 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:28:03,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636578917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:03,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:03,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:28:03,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412233207] [2021-06-05 21:28:03,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:28:03,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:03,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:28:03,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:28:03,275 INFO L87 Difference]: Start difference. First operand 34471 states and 103233 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:03,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:03,537 INFO L93 Difference]: Finished difference Result 35061 states and 104338 transitions. [2021-06-05 21:28:03,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:28:03,537 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:28:03,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:03,611 INFO L225 Difference]: With dead ends: 35061 [2021-06-05 21:28:03,611 INFO L226 Difference]: Without dead ends: 35061 [2021-06-05 21:28:03,611 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 108.8ms TimeCoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:28:03,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35061 states. [2021-06-05 21:28:04,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35061 to 34496. [2021-06-05 21:28:04,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34496 states, 34495 states have (on average 2.9951007392375706) internal successors, (103316), 34495 states have internal predecessors, (103316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:04,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34496 states to 34496 states and 103316 transitions. [2021-06-05 21:28:04,293 INFO L78 Accepts]: Start accepts. Automaton has 34496 states and 103316 transitions. Word has length 25 [2021-06-05 21:28:04,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:04,293 INFO L482 AbstractCegarLoop]: Abstraction has 34496 states and 103316 transitions. [2021-06-05 21:28:04,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:04,293 INFO L276 IsEmpty]: Start isEmpty. Operand 34496 states and 103316 transitions. [2021-06-05 21:28:04,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:28:04,331 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:04,331 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:04,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20206,406 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:04,532 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:04,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:04,532 INFO L82 PathProgramCache]: Analyzing trace with hash 566405070, now seen corresponding path program 405 times [2021-06-05 21:28:04,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:04,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760259498] [2021-06-05 21:28:04,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:04,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:04,597 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 37 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:04,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:04,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760259498] [2021-06-05 21:28:04,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760259498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:04,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684040523] [2021-06-05 21:28:04,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:04,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:28:04,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:04,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:28:04,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:04,664 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 39 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:28:04,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684040523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:04,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:04,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:28:04,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194321905] [2021-06-05 21:28:04,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:28:04,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:04,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:28:04,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:28:04,665 INFO L87 Difference]: Start difference. First operand 34496 states and 103316 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:04,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:04,958 INFO L93 Difference]: Finished difference Result 35075 states and 104177 transitions. [2021-06-05 21:28:04,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:28:04,959 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:28:04,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:05,016 INFO L225 Difference]: With dead ends: 35075 [2021-06-05 21:28:05,016 INFO L226 Difference]: Without dead ends: 35073 [2021-06-05 21:28:05,017 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 138.2ms TimeCoverageRelationStatistics Valid=245, Invalid=405, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:28:05,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35073 states. [2021-06-05 21:28:05,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35073 to 34510. [2021-06-05 21:28:05,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34510 states, 34509 states have (on average 2.995276594511577) internal successors, (103364), 34509 states have internal predecessors, (103364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:05,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34510 states to 34510 states and 103364 transitions. [2021-06-05 21:28:05,577 INFO L78 Accepts]: Start accepts. Automaton has 34510 states and 103364 transitions. Word has length 25 [2021-06-05 21:28:05,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:05,577 INFO L482 AbstractCegarLoop]: Abstraction has 34510 states and 103364 transitions. [2021-06-05 21:28:05,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:05,577 INFO L276 IsEmpty]: Start isEmpty. Operand 34510 states and 103364 transitions. [2021-06-05 21:28:05,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:28:05,610 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:05,610 INFO L554 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:05,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20207,407 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:05,811 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:05,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:05,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1367097777, now seen corresponding path program 406 times [2021-06-05 21:28:05,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:05,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343670312] [2021-06-05 21:28:05,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:05,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:05,881 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 33 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:28:05,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:05,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343670312] [2021-06-05 21:28:05,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343670312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:05,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758066957] [2021-06-05 21:28:05,881 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:05,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:28:05,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:05,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:28:05,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:05,944 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 40 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:28:05,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758066957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:05,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:05,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:28:05,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862699520] [2021-06-05 21:28:05,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:28:05,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:05,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:28:05,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:28:05,945 INFO L87 Difference]: Start difference. First operand 34510 states and 103364 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:06,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:06,234 INFO L93 Difference]: Finished difference Result 34813 states and 103831 transitions. [2021-06-05 21:28:06,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:28:06,235 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:28:06,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:06,298 INFO L225 Difference]: With dead ends: 34813 [2021-06-05 21:28:06,298 INFO L226 Difference]: Without dead ends: 34811 [2021-06-05 21:28:06,298 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 118.8ms TimeCoverageRelationStatistics Valid=239, Invalid=411, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:28:06,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34811 states. [2021-06-05 21:28:06,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34811 to 34480. [2021-06-05 21:28:06,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34480 states, 34479 states have (on average 2.9950694625714203) internal successors, (103267), 34479 states have internal predecessors, (103267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:06,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34480 states to 34480 states and 103267 transitions. [2021-06-05 21:28:06,887 INFO L78 Accepts]: Start accepts. Automaton has 34480 states and 103267 transitions. Word has length 25 [2021-06-05 21:28:06,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:06,887 INFO L482 AbstractCegarLoop]: Abstraction has 34480 states and 103267 transitions. [2021-06-05 21:28:06,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:06,887 INFO L276 IsEmpty]: Start isEmpty. Operand 34480 states and 103267 transitions. [2021-06-05 21:28:06,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:28:06,920 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:06,920 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:07,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20208,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:07,121 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:07,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:07,121 INFO L82 PathProgramCache]: Analyzing trace with hash -2010813166, now seen corresponding path program 407 times [2021-06-05 21:28:07,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:07,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259718695] [2021-06-05 21:28:07,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:07,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:07,190 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 34 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:28:07,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:07,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259718695] [2021-06-05 21:28:07,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259718695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:07,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767837030] [2021-06-05 21:28:07,191 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:07,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 21:28:07,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:07,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:28:07,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:07,263 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 36 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:28:07,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767837030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:07,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:07,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:28:07,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639918103] [2021-06-05 21:28:07,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:28:07,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:07,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:28:07,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:28:07,264 INFO L87 Difference]: Start difference. First operand 34480 states and 103267 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:07,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:07,425 INFO L93 Difference]: Finished difference Result 35049 states and 104051 transitions. [2021-06-05 21:28:07,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:28:07,425 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:28:07,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:07,481 INFO L225 Difference]: With dead ends: 35049 [2021-06-05 21:28:07,481 INFO L226 Difference]: Without dead ends: 35049 [2021-06-05 21:28:07,481 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 69.0ms TimeCoverageRelationStatistics Valid=105, Invalid=135, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:28:07,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35049 states. [2021-06-05 21:28:07,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35049 to 34468. [2021-06-05 21:28:07,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34468 states, 34467 states have (on average 2.994574520555894) internal successors, (103214), 34467 states have internal predecessors, (103214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:08,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34468 states to 34468 states and 103214 transitions. [2021-06-05 21:28:08,040 INFO L78 Accepts]: Start accepts. Automaton has 34468 states and 103214 transitions. Word has length 25 [2021-06-05 21:28:08,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:08,040 INFO L482 AbstractCegarLoop]: Abstraction has 34468 states and 103214 transitions. [2021-06-05 21:28:08,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:08,040 INFO L276 IsEmpty]: Start isEmpty. Operand 34468 states and 103214 transitions. [2021-06-05 21:28:08,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:28:08,074 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:08,074 INFO L554 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:08,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20209,409 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:08,275 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:08,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:08,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1217256211, now seen corresponding path program 408 times [2021-06-05 21:28:08,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:08,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148878196] [2021-06-05 21:28:08,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:08,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:08,348 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 33 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:08,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:08,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148878196] [2021-06-05 21:28:08,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148878196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:08,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321940404] [2021-06-05 21:28:08,348 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:08,375 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:28:08,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:08,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:28:08,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:08,415 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 40 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:08,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321940404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:08,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:08,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:28:08,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883342437] [2021-06-05 21:28:08,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:28:08,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:08,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:28:08,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:28:08,416 INFO L87 Difference]: Start difference. First operand 34468 states and 103214 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:08,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:08,696 INFO L93 Difference]: Finished difference Result 34766 states and 103678 transitions. [2021-06-05 21:28:08,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:28:08,696 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:28:08,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:08,750 INFO L225 Difference]: With dead ends: 34766 [2021-06-05 21:28:08,750 INFO L226 Difference]: Without dead ends: 34764 [2021-06-05 21:28:08,750 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 133.5ms TimeCoverageRelationStatistics Valid=268, Invalid=488, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:28:08,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34764 states. [2021-06-05 21:28:09,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34764 to 34468. [2021-06-05 21:28:09,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34468 states, 34467 states have (on average 2.994516494037775) internal successors, (103212), 34467 states have internal predecessors, (103212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:09,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34468 states to 34468 states and 103212 transitions. [2021-06-05 21:28:09,372 INFO L78 Accepts]: Start accepts. Automaton has 34468 states and 103212 transitions. Word has length 25 [2021-06-05 21:28:09,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:09,372 INFO L482 AbstractCegarLoop]: Abstraction has 34468 states and 103212 transitions. [2021-06-05 21:28:09,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:09,373 INFO L276 IsEmpty]: Start isEmpty. Operand 34468 states and 103212 transitions. [2021-06-05 21:28:09,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:28:09,404 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:09,404 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:09,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20210 [2021-06-05 21:28:09,605 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:09,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:09,605 INFO L82 PathProgramCache]: Analyzing trace with hash 555106796, now seen corresponding path program 409 times [2021-06-05 21:28:09,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:09,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591837234] [2021-06-05 21:28:09,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:09,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:09,675 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:09,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:09,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591837234] [2021-06-05 21:28:09,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591837234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:09,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123922577] [2021-06-05 21:28:09,675 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:09,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:09,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:28:09,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:09,746 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 29 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:09,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123922577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:09,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:09,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:28:09,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650455311] [2021-06-05 21:28:09,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:28:09,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:09,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:28:09,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:28:09,747 INFO L87 Difference]: Start difference. First operand 34468 states and 103212 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:09,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:09,945 INFO L93 Difference]: Finished difference Result 36516 states and 108167 transitions. [2021-06-05 21:28:09,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:28:09,946 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:28:09,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:10,002 INFO L225 Difference]: With dead ends: 36516 [2021-06-05 21:28:10,003 INFO L226 Difference]: Without dead ends: 36516 [2021-06-05 21:28:10,003 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 80.0ms TimeCoverageRelationStatistics Valid=139, Invalid=203, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:28:10,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36516 states. [2021-06-05 21:28:10,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36516 to 34482. [2021-06-05 21:28:10,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34482 states, 34481 states have (on average 2.9944607174965925) internal successors, (103252), 34481 states have internal predecessors, (103252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:10,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34482 states to 34482 states and 103252 transitions. [2021-06-05 21:28:10,599 INFO L78 Accepts]: Start accepts. Automaton has 34482 states and 103252 transitions. Word has length 25 [2021-06-05 21:28:10,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:10,599 INFO L482 AbstractCegarLoop]: Abstraction has 34482 states and 103252 transitions. [2021-06-05 21:28:10,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:10,599 INFO L276 IsEmpty]: Start isEmpty. Operand 34482 states and 103252 transitions. [2021-06-05 21:28:10,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:28:10,631 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:10,631 INFO L554 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:10,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20211,411 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:10,832 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:10,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:10,832 INFO L82 PathProgramCache]: Analyzing trace with hash 272148785, now seen corresponding path program 410 times [2021-06-05 21:28:10,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:10,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387879273] [2021-06-05 21:28:10,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:10,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:10,910 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 35 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:10,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:10,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387879273] [2021-06-05 21:28:10,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387879273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:10,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609259455] [2021-06-05 21:28:10,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:10,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:28:10,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:10,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:28:10,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:10,974 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 42 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:10,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609259455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:10,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:10,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:28:10,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112224942] [2021-06-05 21:28:10,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:28:10,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:10,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:28:10,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:28:10,975 INFO L87 Difference]: Start difference. First operand 34482 states and 103252 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:11,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:11,224 INFO L93 Difference]: Finished difference Result 34881 states and 104144 transitions. [2021-06-05 21:28:11,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:28:11,224 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:28:11,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:11,277 INFO L225 Difference]: With dead ends: 34881 [2021-06-05 21:28:11,277 INFO L226 Difference]: Without dead ends: 34878 [2021-06-05 21:28:11,277 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 138.7ms TimeCoverageRelationStatistics Valid=259, Invalid=497, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:28:11,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34878 states. [2021-06-05 21:28:11,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34878 to 34485. [2021-06-05 21:28:11,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34485 states, 34484 states have (on average 2.9944032014847464) internal successors, (103259), 34484 states have internal predecessors, (103259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:11,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34485 states to 34485 states and 103259 transitions. [2021-06-05 21:28:11,804 INFO L78 Accepts]: Start accepts. Automaton has 34485 states and 103259 transitions. Word has length 25 [2021-06-05 21:28:11,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:11,804 INFO L482 AbstractCegarLoop]: Abstraction has 34485 states and 103259 transitions. [2021-06-05 21:28:11,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:11,804 INFO L276 IsEmpty]: Start isEmpty. Operand 34485 states and 103259 transitions. [2021-06-05 21:28:11,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:28:11,833 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:11,833 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:12,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20212 [2021-06-05 21:28:12,033 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:12,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:12,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1505753006, now seen corresponding path program 411 times [2021-06-05 21:28:12,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:12,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254300011] [2021-06-05 21:28:12,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:12,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:12,120 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:12,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:12,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254300011] [2021-06-05 21:28:12,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254300011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:12,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516924981] [2021-06-05 21:28:12,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:12,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:28:12,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:12,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:28:12,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:12,197 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:12,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516924981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:12,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:12,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:28:12,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961454156] [2021-06-05 21:28:12,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:28:12,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:12,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:28:12,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:28:12,197 INFO L87 Difference]: Start difference. First operand 34485 states and 103259 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:12,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:12,436 INFO L93 Difference]: Finished difference Result 46521 states and 138645 transitions. [2021-06-05 21:28:12,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:28:12,437 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:28:12,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:12,512 INFO L225 Difference]: With dead ends: 46521 [2021-06-05 21:28:12,512 INFO L226 Difference]: Without dead ends: 46521 [2021-06-05 21:28:12,512 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 104.9ms TimeCoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:28:12,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46521 states. [2021-06-05 21:28:13,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46521 to 44002. [2021-06-05 21:28:13,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44002 states, 44001 states have (on average 3.0104088543442193) internal successors, (132461), 44001 states have internal predecessors, (132461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:13,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44002 states to 44002 states and 132461 transitions. [2021-06-05 21:28:13,290 INFO L78 Accepts]: Start accepts. Automaton has 44002 states and 132461 transitions. Word has length 25 [2021-06-05 21:28:13,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:13,290 INFO L482 AbstractCegarLoop]: Abstraction has 44002 states and 132461 transitions. [2021-06-05 21:28:13,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:13,290 INFO L276 IsEmpty]: Start isEmpty. Operand 44002 states and 132461 transitions. [2021-06-05 21:28:13,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:28:13,326 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:13,326 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:13,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 413 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20213 [2021-06-05 21:28:13,527 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:13,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:13,527 INFO L82 PathProgramCache]: Analyzing trace with hash 460670884, now seen corresponding path program 412 times [2021-06-05 21:28:13,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:13,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50830314] [2021-06-05 21:28:13,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:13,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:13,588 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 34 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:28:13,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:13,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50830314] [2021-06-05 21:28:13,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50830314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:13,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138644769] [2021-06-05 21:28:13,589 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:13,614 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:28:13,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:13,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:28:13,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:13,654 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 35 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:28:13,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138644769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:13,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:13,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:28:13,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394555514] [2021-06-05 21:28:13,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:28:13,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:13,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:28:13,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:28:13,654 INFO L87 Difference]: Start difference. First operand 44002 states and 132461 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:13,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:13,935 INFO L93 Difference]: Finished difference Result 44568 states and 133377 transitions. [2021-06-05 21:28:13,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:28:13,935 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:28:13,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:13,999 INFO L225 Difference]: With dead ends: 44568 [2021-06-05 21:28:13,999 INFO L226 Difference]: Without dead ends: 44564 [2021-06-05 21:28:13,999 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 122.3ms TimeCoverageRelationStatistics Valid=214, Invalid=386, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:28:14,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44564 states. [2021-06-05 21:28:14,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44564 to 44065. [2021-06-05 21:28:14,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44065 states, 44064 states have (on average 3.0110748002904866) internal successors, (132680), 44064 states have internal predecessors, (132680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:14,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44065 states to 44065 states and 132680 transitions. [2021-06-05 21:28:14,716 INFO L78 Accepts]: Start accepts. Automaton has 44065 states and 132680 transitions. Word has length 25 [2021-06-05 21:28:14,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:14,717 INFO L482 AbstractCegarLoop]: Abstraction has 44065 states and 132680 transitions. [2021-06-05 21:28:14,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:14,717 INFO L276 IsEmpty]: Start isEmpty. Operand 44065 states and 132680 transitions. [2021-06-05 21:28:14,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:28:14,757 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:14,757 INFO L554 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:14,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20214 [2021-06-05 21:28:14,958 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:14,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:14,958 INFO L82 PathProgramCache]: Analyzing trace with hash 354023683, now seen corresponding path program 413 times [2021-06-05 21:28:14,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:14,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403963234] [2021-06-05 21:28:14,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:14,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:15,032 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 29 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:15,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:15,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403963234] [2021-06-05 21:28:15,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403963234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:15,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478005236] [2021-06-05 21:28:15,032 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:15,060 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 21:28:15,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:15,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:28:15,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:15,100 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 35 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:15,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478005236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:15,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:15,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:28:15,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219104642] [2021-06-05 21:28:15,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:28:15,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:15,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:28:15,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:28:15,101 INFO L87 Difference]: Start difference. First operand 44065 states and 132680 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:15,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:15,391 INFO L93 Difference]: Finished difference Result 44288 states and 133062 transitions. [2021-06-05 21:28:15,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:28:15,391 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:28:15,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:15,467 INFO L225 Difference]: With dead ends: 44288 [2021-06-05 21:28:15,467 INFO L226 Difference]: Without dead ends: 44282 [2021-06-05 21:28:15,467 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 135.7ms TimeCoverageRelationStatistics Valid=260, Invalid=496, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:28:15,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44282 states. [2021-06-05 21:28:16,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44282 to 44054. [2021-06-05 21:28:16,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44054 states, 44053 states have (on average 3.0111683653780674) internal successors, (132651), 44053 states have internal predecessors, (132651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:16,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44054 states to 44054 states and 132651 transitions. [2021-06-05 21:28:16,277 INFO L78 Accepts]: Start accepts. Automaton has 44054 states and 132651 transitions. Word has length 25 [2021-06-05 21:28:16,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:16,278 INFO L482 AbstractCegarLoop]: Abstraction has 44054 states and 132651 transitions. [2021-06-05 21:28:16,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:16,278 INFO L276 IsEmpty]: Start isEmpty. Operand 44054 states and 132651 transitions. [2021-06-05 21:28:16,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:28:16,311 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:16,311 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:16,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20215 [2021-06-05 21:28:16,512 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:16,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:16,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1423878108, now seen corresponding path program 414 times [2021-06-05 21:28:16,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:16,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672074547] [2021-06-05 21:28:16,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:16,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:16,583 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 27 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:16,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:16,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672074547] [2021-06-05 21:28:16,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672074547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:16,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824129022] [2021-06-05 21:28:16,584 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:16,611 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:28:16,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:16,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:28:16,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:16,656 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:16,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824129022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:16,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:16,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:28:16,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896978505] [2021-06-05 21:28:16,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:28:16,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:16,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:28:16,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:28:16,657 INFO L87 Difference]: Start difference. First operand 44054 states and 132651 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:17,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:17,016 INFO L93 Difference]: Finished difference Result 48810 states and 145573 transitions. [2021-06-05 21:28:17,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:28:17,017 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:28:17,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:17,097 INFO L225 Difference]: With dead ends: 48810 [2021-06-05 21:28:17,097 INFO L226 Difference]: Without dead ends: 48810 [2021-06-05 21:28:17,097 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 99.8ms TimeCoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:28:17,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48810 states. [2021-06-05 21:28:17,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48810 to 34578. [2021-06-05 21:28:17,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34578 states, 34577 states have (on average 2.9973971136882898) internal successors, (103641), 34577 states have internal predecessors, (103641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:17,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34578 states to 34578 states and 103641 transitions. [2021-06-05 21:28:17,870 INFO L78 Accepts]: Start accepts. Automaton has 34578 states and 103641 transitions. Word has length 25 [2021-06-05 21:28:17,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:17,871 INFO L482 AbstractCegarLoop]: Abstraction has 34578 states and 103641 transitions. [2021-06-05 21:28:17,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:17,871 INFO L276 IsEmpty]: Start isEmpty. Operand 34578 states and 103641 transitions. [2021-06-05 21:28:17,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:28:17,905 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:17,905 INFO L554 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:18,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20216,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:18,105 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:18,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:18,106 INFO L82 PathProgramCache]: Analyzing trace with hash -802828281, now seen corresponding path program 415 times [2021-06-05 21:28:18,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:18,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36499525] [2021-06-05 21:28:18,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:18,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:18,169 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 21 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:18,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:18,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36499525] [2021-06-05 21:28:18,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36499525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:18,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135071908] [2021-06-05 21:28:18,170 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:18,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:18,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:28:18,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:18,240 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 27 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:28:18,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135071908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:18,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:18,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:28:18,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516304091] [2021-06-05 21:28:18,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:28:18,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:18,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:28:18,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:28:18,241 INFO L87 Difference]: Start difference. First operand 34578 states and 103641 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:18,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:18,614 INFO L93 Difference]: Finished difference Result 35262 states and 104945 transitions. [2021-06-05 21:28:18,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:28:18,614 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:28:18,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:18,676 INFO L225 Difference]: With dead ends: 35262 [2021-06-05 21:28:18,677 INFO L226 Difference]: Without dead ends: 35262 [2021-06-05 21:28:18,677 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 98.8ms TimeCoverageRelationStatistics Valid=184, Invalid=278, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:28:18,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35262 states. [2021-06-05 21:28:19,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35262 to 34634. [2021-06-05 21:28:19,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34634 states, 34633 states have (on average 2.997574567608928) internal successors, (103815), 34633 states have internal predecessors, (103815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:19,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34634 states to 34634 states and 103815 transitions. [2021-06-05 21:28:19,311 INFO L78 Accepts]: Start accepts. Automaton has 34634 states and 103815 transitions. Word has length 25 [2021-06-05 21:28:19,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:19,311 INFO L482 AbstractCegarLoop]: Abstraction has 34634 states and 103815 transitions. [2021-06-05 21:28:19,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:19,311 INFO L276 IsEmpty]: Start isEmpty. Operand 34634 states and 103815 transitions. [2021-06-05 21:28:19,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:28:19,456 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:19,456 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:19,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20217,417 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:19,669 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:19,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:19,669 INFO L82 PathProgramCache]: Analyzing trace with hash 141933702, now seen corresponding path program 416 times [2021-06-05 21:28:19,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:19,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116764062] [2021-06-05 21:28:19,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:19,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:19,730 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 40 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:19,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:19,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116764062] [2021-06-05 21:28:19,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116764062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:19,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760658028] [2021-06-05 21:28:19,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:19,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:28:19,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:19,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:28:19,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:19,795 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 43 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:28:19,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760658028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:19,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:19,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:28:19,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455081394] [2021-06-05 21:28:19,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:28:19,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:19,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:28:19,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:28:19,796 INFO L87 Difference]: Start difference. First operand 34634 states and 103815 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:20,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:20,074 INFO L93 Difference]: Finished difference Result 35187 states and 104616 transitions. [2021-06-05 21:28:20,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:28:20,075 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:28:20,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:20,130 INFO L225 Difference]: With dead ends: 35187 [2021-06-05 21:28:20,130 INFO L226 Difference]: Without dead ends: 35183 [2021-06-05 21:28:20,130 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 127.1ms TimeCoverageRelationStatistics Valid=244, Invalid=406, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:28:20,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35183 states. [2021-06-05 21:28:20,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35183 to 34619. [2021-06-05 21:28:20,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34619 states, 34618 states have (on average 2.997255762897914) internal successors, (103759), 34618 states have internal predecessors, (103759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:20,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34619 states to 34619 states and 103759 transitions. [2021-06-05 21:28:20,783 INFO L78 Accepts]: Start accepts. Automaton has 34619 states and 103759 transitions. Word has length 25 [2021-06-05 21:28:20,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:20,784 INFO L482 AbstractCegarLoop]: Abstraction has 34619 states and 103759 transitions. [2021-06-05 21:28:20,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:20,784 INFO L276 IsEmpty]: Start isEmpty. Operand 34619 states and 103759 transitions. [2021-06-05 21:28:20,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:28:20,815 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:20,815 INFO L554 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:21,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20218,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:21,016 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:21,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:21,016 INFO L82 PathProgramCache]: Analyzing trace with hash 942626409, now seen corresponding path program 417 times [2021-06-05 21:28:21,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:21,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987867301] [2021-06-05 21:28:21,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:21,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:21,080 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 30 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:21,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:21,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987867301] [2021-06-05 21:28:21,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987867301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:21,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246470745] [2021-06-05 21:28:21,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:21,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:28:21,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:21,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 21:28:21,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:21,283 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-05 21:28:21,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246470745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:21,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:21,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2021-06-05 21:28:21,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123788359] [2021-06-05 21:28:21,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 21:28:21,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:21,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 21:28:21,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:28:21,284 INFO L87 Difference]: Start difference. First operand 34619 states and 103759 transitions. Second operand has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:23,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:23,186 INFO L93 Difference]: Finished difference Result 67922 states and 202433 transitions. [2021-06-05 21:28:23,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-06-05 21:28:23,186 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:28:23,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:23,315 INFO L225 Difference]: With dead ends: 67922 [2021-06-05 21:28:23,315 INFO L226 Difference]: Without dead ends: 67903 [2021-06-05 21:28:23,316 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5477 ImplicationChecksByTransitivity, 1309.9ms TimeCoverageRelationStatistics Valid=1479, Invalid=14021, Unknown=0, NotChecked=0, Total=15500 [2021-06-05 21:28:23,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67903 states. [2021-06-05 21:28:24,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67903 to 38876. [2021-06-05 21:28:24,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38876 states, 38875 states have (on average 2.9676655948553057) internal successors, (115368), 38875 states have internal predecessors, (115368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:24,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38876 states to 38876 states and 115368 transitions. [2021-06-05 21:28:24,341 INFO L78 Accepts]: Start accepts. Automaton has 38876 states and 115368 transitions. Word has length 25 [2021-06-05 21:28:24,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:24,341 INFO L482 AbstractCegarLoop]: Abstraction has 38876 states and 115368 transitions. [2021-06-05 21:28:24,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:24,342 INFO L276 IsEmpty]: Start isEmpty. Operand 38876 states and 115368 transitions. [2021-06-05 21:28:24,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:28:24,379 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:24,379 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:24,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20219,419 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:24,579 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:24,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:24,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1859682762, now seen corresponding path program 418 times [2021-06-05 21:28:24,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:24,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614004800] [2021-06-05 21:28:24,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:24,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:24,645 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 38 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:24,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:24,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614004800] [2021-06-05 21:28:24,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614004800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:24,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132469220] [2021-06-05 21:28:24,645 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:24,671 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:28:24,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:24,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:28:24,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:24,721 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 41 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:24,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132469220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:24,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:24,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:28:24,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402515565] [2021-06-05 21:28:24,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:28:24,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:24,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:28:24,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:28:24,722 INFO L87 Difference]: Start difference. First operand 38876 states and 115368 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:24,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:24,908 INFO L93 Difference]: Finished difference Result 40813 states and 119859 transitions. [2021-06-05 21:28:24,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:28:24,909 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:28:24,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:24,965 INFO L225 Difference]: With dead ends: 40813 [2021-06-05 21:28:24,966 INFO L226 Difference]: Without dead ends: 40813 [2021-06-05 21:28:24,966 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 70.2ms TimeCoverageRelationStatistics Valid=118, Invalid=154, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:25,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40813 states. [2021-06-05 21:28:25,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40813 to 38877. [2021-06-05 21:28:25,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38877 states, 38876 states have (on average 2.9672291388002883) internal successors, (115354), 38876 states have internal predecessors, (115354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:25,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38877 states to 38877 states and 115354 transitions. [2021-06-05 21:28:25,813 INFO L78 Accepts]: Start accepts. Automaton has 38877 states and 115354 transitions. Word has length 25 [2021-06-05 21:28:25,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:25,813 INFO L482 AbstractCegarLoop]: Abstraction has 38877 states and 115354 transitions. [2021-06-05 21:28:25,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:25,813 INFO L276 IsEmpty]: Start isEmpty. Operand 38877 states and 115354 transitions. [2021-06-05 21:28:25,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:28:25,849 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:25,849 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:26,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20220,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:26,050 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:26,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:26,050 INFO L82 PathProgramCache]: Analyzing trace with hash 130635428, now seen corresponding path program 419 times [2021-06-05 21:28:26,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:26,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126356603] [2021-06-05 21:28:26,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:26,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:26,114 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:28:26,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:26,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126356603] [2021-06-05 21:28:26,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126356603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:26,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566177553] [2021-06-05 21:28:26,114 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:26,141 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:28:26,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:26,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:28:26,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:26,190 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 34 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:28:26,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566177553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:26,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:26,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:28:26,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126004837] [2021-06-05 21:28:26,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:28:26,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:26,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:28:26,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:28:26,191 INFO L87 Difference]: Start difference. First operand 38877 states and 115354 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:26,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:26,371 INFO L93 Difference]: Finished difference Result 39523 states and 116192 transitions. [2021-06-05 21:28:26,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:28:26,371 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:28:26,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:26,428 INFO L225 Difference]: With dead ends: 39523 [2021-06-05 21:28:26,428 INFO L226 Difference]: Without dead ends: 39523 [2021-06-05 21:28:26,428 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 73.8ms TimeCoverageRelationStatistics Valid=122, Invalid=184, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:28:26,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39523 states. [2021-06-05 21:28:27,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39523 to 38819. [2021-06-05 21:28:27,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38819 states, 38818 states have (on average 2.9664330980472977) internal successors, (115151), 38818 states have internal predecessors, (115151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:27,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38819 states to 38819 states and 115151 transitions. [2021-06-05 21:28:27,278 INFO L78 Accepts]: Start accepts. Automaton has 38819 states and 115151 transitions. Word has length 25 [2021-06-05 21:28:27,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:27,278 INFO L482 AbstractCegarLoop]: Abstraction has 38819 states and 115151 transitions. [2021-06-05 21:28:27,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:27,278 INFO L276 IsEmpty]: Start isEmpty. Operand 38819 states and 115151 transitions. [2021-06-05 21:28:27,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:28:27,320 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:27,320 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:27,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20221 [2021-06-05 21:28:27,521 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:27,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:27,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1930224374, now seen corresponding path program 420 times [2021-06-05 21:28:27,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:27,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602360871] [2021-06-05 21:28:27,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:27,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:27,598 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 27 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:27,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:27,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602360871] [2021-06-05 21:28:27,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602360871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:27,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584275410] [2021-06-05 21:28:27,598 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:27,626 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:28:27,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:27,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:28:27,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:27,683 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:27,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584275410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:27,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:27,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:28:27,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268167975] [2021-06-05 21:28:27,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:27,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:27,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:27,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:27,684 INFO L87 Difference]: Start difference. First operand 38819 states and 115151 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:27,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:27,917 INFO L93 Difference]: Finished difference Result 42306 states and 124008 transitions. [2021-06-05 21:28:27,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:28:27,918 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:28:27,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:27,982 INFO L225 Difference]: With dead ends: 42306 [2021-06-05 21:28:27,983 INFO L226 Difference]: Without dead ends: 42306 [2021-06-05 21:28:27,983 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 106.3ms TimeCoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:28:28,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42306 states. [2021-06-05 21:28:28,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42306 to 38691. [2021-06-05 21:28:28,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38691 states, 38690 states have (on average 2.9641509433962265) internal successors, (114683), 38690 states have internal predecessors, (114683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:28,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38691 states to 38691 states and 114683 transitions. [2021-06-05 21:28:28,929 INFO L78 Accepts]: Start accepts. Automaton has 38691 states and 114683 transitions. Word has length 25 [2021-06-05 21:28:28,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:28,929 INFO L482 AbstractCegarLoop]: Abstraction has 38691 states and 114683 transitions. [2021-06-05 21:28:28,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:28,929 INFO L276 IsEmpty]: Start isEmpty. Operand 38691 states and 114683 transitions. [2021-06-05 21:28:28,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:28:28,963 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:28,963 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:29,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20222,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:29,163 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:29,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:29,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1392368796, now seen corresponding path program 421 times [2021-06-05 21:28:29,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:29,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960115971] [2021-06-05 21:28:29,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:29,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:29,236 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:29,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:29,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960115971] [2021-06-05 21:28:29,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960115971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:29,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723641351] [2021-06-05 21:28:29,237 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:29,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:29,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:28:29,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:29,312 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:29,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723641351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:29,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:29,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:28:29,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022672344] [2021-06-05 21:28:29,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:29,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:29,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:29,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:29,313 INFO L87 Difference]: Start difference. First operand 38691 states and 114683 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:29,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:29,623 INFO L93 Difference]: Finished difference Result 55502 states and 163268 transitions. [2021-06-05 21:28:29,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:28:29,623 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:28:29,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:29,734 INFO L225 Difference]: With dead ends: 55502 [2021-06-05 21:28:29,734 INFO L226 Difference]: Without dead ends: 55502 [2021-06-05 21:28:29,734 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 128.0ms TimeCoverageRelationStatistics Valid=241, Invalid=409, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:28:29,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55502 states. [2021-06-05 21:28:30,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55502 to 48558. [2021-06-05 21:28:30,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48558 states, 48557 states have (on average 2.977016702020306) internal successors, (144555), 48557 states have internal predecessors, (144555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:30,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48558 states to 48558 states and 144555 transitions. [2021-06-05 21:28:30,968 INFO L78 Accepts]: Start accepts. Automaton has 48558 states and 144555 transitions. Word has length 25 [2021-06-05 21:28:30,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:30,968 INFO L482 AbstractCegarLoop]: Abstraction has 48558 states and 144555 transitions. [2021-06-05 21:28:30,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:30,969 INFO L276 IsEmpty]: Start isEmpty. Operand 48558 states and 144555 transitions. [2021-06-05 21:28:31,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:28:31,014 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:31,014 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:31,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20223 [2021-06-05 21:28:31,214 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:31,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:31,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1145753042, now seen corresponding path program 422 times [2021-06-05 21:28:31,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:31,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107090856] [2021-06-05 21:28:31,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:31,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:31,296 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:31,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:31,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107090856] [2021-06-05 21:28:31,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107090856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:31,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9210340] [2021-06-05 21:28:31,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:31,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:28:31,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:31,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:28:31,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:31,373 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 27 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:31,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9210340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:31,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:31,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 21:28:31,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654219924] [2021-06-05 21:28:31,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:31,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:31,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:31,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:31,374 INFO L87 Difference]: Start difference. First operand 48558 states and 144555 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:31,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:31,899 INFO L93 Difference]: Finished difference Result 55938 states and 164755 transitions. [2021-06-05 21:28:31,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:28:31,899 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:28:31,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:32,013 INFO L225 Difference]: With dead ends: 55938 [2021-06-05 21:28:32,013 INFO L226 Difference]: Without dead ends: 55938 [2021-06-05 21:28:32,013 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 132.3ms TimeCoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:28:32,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55938 states. [2021-06-05 21:28:32,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55938 to 38647. [2021-06-05 21:28:32,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38647 states, 38646 states have (on average 2.965714433576567) internal successors, (114613), 38646 states have internal predecessors, (114613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:32,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38647 states to 38647 states and 114613 transitions. [2021-06-05 21:28:32,824 INFO L78 Accepts]: Start accepts. Automaton has 38647 states and 114613 transitions. Word has length 25 [2021-06-05 21:28:32,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:32,824 INFO L482 AbstractCegarLoop]: Abstraction has 38647 states and 114613 transitions. [2021-06-05 21:28:32,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:32,824 INFO L276 IsEmpty]: Start isEmpty. Operand 38647 states and 114613 transitions. [2021-06-05 21:28:32,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:28:32,860 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:32,860 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:33,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20224,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:33,060 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:33,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:33,060 INFO L82 PathProgramCache]: Analyzing trace with hash -131776818, now seen corresponding path program 423 times [2021-06-05 21:28:33,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:33,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549585033] [2021-06-05 21:28:33,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:33,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:33,119 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 41 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:33,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:33,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549585033] [2021-06-05 21:28:33,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549585033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:33,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122904933] [2021-06-05 21:28:33,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:33,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 21:28:33,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:33,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:28:33,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:33,186 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 45 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:28:33,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122904933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:33,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:33,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:28:33,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014359265] [2021-06-05 21:28:33,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:28:33,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:33,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:28:33,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:28:33,186 INFO L87 Difference]: Start difference. First operand 38647 states and 114613 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:33,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:33,448 INFO L93 Difference]: Finished difference Result 39269 states and 115484 transitions. [2021-06-05 21:28:33,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:28:33,448 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:28:33,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:33,510 INFO L225 Difference]: With dead ends: 39269 [2021-06-05 21:28:33,511 INFO L226 Difference]: Without dead ends: 39265 [2021-06-05 21:28:33,511 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 121.3ms TimeCoverageRelationStatistics Valid=243, Invalid=407, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:28:33,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39265 states. [2021-06-05 21:28:34,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39265 to 38661. [2021-06-05 21:28:34,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38661 states, 38660 states have (on average 2.9655975168132436) internal successors, (114650), 38660 states have internal predecessors, (114650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:34,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38661 states to 38661 states and 114650 transitions. [2021-06-05 21:28:34,283 INFO L78 Accepts]: Start accepts. Automaton has 38661 states and 114650 transitions. Word has length 25 [2021-06-05 21:28:34,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:34,283 INFO L482 AbstractCegarLoop]: Abstraction has 38661 states and 114650 transitions. [2021-06-05 21:28:34,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:34,283 INFO L276 IsEmpty]: Start isEmpty. Operand 38661 states and 114650 transitions. [2021-06-05 21:28:34,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:28:34,320 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:34,320 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:34,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 425 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20225 [2021-06-05 21:28:34,521 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:34,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:34,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1585972242, now seen corresponding path program 424 times [2021-06-05 21:28:34,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:34,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627199265] [2021-06-05 21:28:34,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:34,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:34,586 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 39 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:28:34,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:34,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627199265] [2021-06-05 21:28:34,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627199265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:34,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728879393] [2021-06-05 21:28:34,586 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:34,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:28:34,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:34,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:28:34,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:34,820 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-06-05 21:28:34,849 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 43 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:28:34,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728879393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:34,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:34,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:28:34,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860465570] [2021-06-05 21:28:34,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:28:34,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:34,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:28:34,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:28:34,849 INFO L87 Difference]: Start difference. First operand 38661 states and 114650 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:35,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:35,053 INFO L93 Difference]: Finished difference Result 41548 states and 121884 transitions. [2021-06-05 21:28:35,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:28:35,053 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:28:35,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:35,118 INFO L225 Difference]: With dead ends: 41548 [2021-06-05 21:28:35,118 INFO L226 Difference]: Without dead ends: 41548 [2021-06-05 21:28:35,118 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 75.3ms TimeCoverageRelationStatistics Valid=131, Invalid=175, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:28:35,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41548 states. [2021-06-05 21:28:35,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41548 to 38678. [2021-06-05 21:28:35,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38678 states, 38677 states have (on average 2.9651989554515605) internal successors, (114685), 38677 states have internal predecessors, (114685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:35,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38678 states to 38678 states and 114685 transitions. [2021-06-05 21:28:35,995 INFO L78 Accepts]: Start accepts. Automaton has 38678 states and 114685 transitions. Word has length 25 [2021-06-05 21:28:35,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:35,996 INFO L482 AbstractCegarLoop]: Abstraction has 38678 states and 114685 transitions. [2021-06-05 21:28:35,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:35,996 INFO L276 IsEmpty]: Start isEmpty. Operand 38678 states and 114685 transitions. [2021-06-05 21:28:36,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:28:36,035 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:36,035 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:36,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20226,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:36,235 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:36,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:36,236 INFO L82 PathProgramCache]: Analyzing trace with hash -143075092, now seen corresponding path program 425 times [2021-06-05 21:28:36,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:36,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953317362] [2021-06-05 21:28:36,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:36,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:36,301 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 35 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:36,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:36,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953317362] [2021-06-05 21:28:36,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953317362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:36,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984883757] [2021-06-05 21:28:36,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:36,328 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 21:28:36,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:36,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:28:36,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:36,374 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 38 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:36,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984883757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:36,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:36,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:28:36,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744330931] [2021-06-05 21:28:36,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:28:36,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:36,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:28:36,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:28:36,375 INFO L87 Difference]: Start difference. First operand 38678 states and 114685 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:36,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:36,567 INFO L93 Difference]: Finished difference Result 41975 states and 123155 transitions. [2021-06-05 21:28:36,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:28:36,567 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:28:36,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:36,627 INFO L225 Difference]: With dead ends: 41975 [2021-06-05 21:28:36,628 INFO L226 Difference]: Without dead ends: 41975 [2021-06-05 21:28:36,628 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 82.2ms TimeCoverageRelationStatistics Valid=152, Invalid=228, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:28:36,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41975 states. [2021-06-05 21:28:37,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41975 to 38672. [2021-06-05 21:28:37,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38672 states, 38671 states have (on average 2.9648832458431382) internal successors, (114655), 38671 states have internal predecessors, (114655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:37,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38672 states to 38672 states and 114655 transitions. [2021-06-05 21:28:37,376 INFO L78 Accepts]: Start accepts. Automaton has 38672 states and 114655 transitions. Word has length 25 [2021-06-05 21:28:37,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:37,376 INFO L482 AbstractCegarLoop]: Abstraction has 38672 states and 114655 transitions. [2021-06-05 21:28:37,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:37,376 INFO L276 IsEmpty]: Start isEmpty. Operand 38672 states and 114655 transitions. [2021-06-05 21:28:37,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:28:37,408 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:37,408 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:37,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20227,427 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:37,609 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:37,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:37,609 INFO L82 PathProgramCache]: Analyzing trace with hash 2091032402, now seen corresponding path program 426 times [2021-06-05 21:28:37,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:37,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172082979] [2021-06-05 21:28:37,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:37,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:37,678 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:28:37,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:37,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172082979] [2021-06-05 21:28:37,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172082979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:37,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667460522] [2021-06-05 21:28:37,678 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:37,706 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 21:28:37,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:37,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:28:37,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:37,751 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:28:37,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667460522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:37,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:37,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:28:37,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391054268] [2021-06-05 21:28:37,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:28:37,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:37,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:28:37,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:28:37,751 INFO L87 Difference]: Start difference. First operand 38672 states and 114655 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:38,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:38,015 INFO L93 Difference]: Finished difference Result 60964 states and 181254 transitions. [2021-06-05 21:28:38,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:28:38,015 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:28:38,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:38,397 INFO L225 Difference]: With dead ends: 60964 [2021-06-05 21:28:38,398 INFO L226 Difference]: Without dead ends: 60964 [2021-06-05 21:28:38,398 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 79.6ms TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:28:38,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60964 states. [2021-06-05 21:28:39,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60964 to 60066. [2021-06-05 21:28:39,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60066 states, 60065 states have (on average 2.996270706734371) internal successors, (179971), 60065 states have internal predecessors, (179971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:39,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60066 states to 60066 states and 179971 transitions. [2021-06-05 21:28:39,547 INFO L78 Accepts]: Start accepts. Automaton has 60066 states and 179971 transitions. Word has length 25 [2021-06-05 21:28:39,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:39,547 INFO L482 AbstractCegarLoop]: Abstraction has 60066 states and 179971 transitions. [2021-06-05 21:28:39,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:39,548 INFO L276 IsEmpty]: Start isEmpty. Operand 60066 states and 179971 transitions. [2021-06-05 21:28:39,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:28:39,601 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:39,601 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:39,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20228,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:39,801 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:39,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:39,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1666079316, now seen corresponding path program 427 times [2021-06-05 21:28:39,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:39,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124496085] [2021-06-05 21:28:39,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:39,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:39,882 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:39,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:39,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124496085] [2021-06-05 21:28:39,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124496085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:39,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226950545] [2021-06-05 21:28:39,883 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:39,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:39,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:28:39,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:39,958 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 27 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:39,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226950545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:39,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:39,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 21:28:39,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938715147] [2021-06-05 21:28:39,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:39,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:39,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:39,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:39,959 INFO L87 Difference]: Start difference. First operand 60066 states and 179971 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:40,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:40,289 INFO L93 Difference]: Finished difference Result 63184 states and 187571 transitions. [2021-06-05 21:28:40,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:28:40,289 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:28:40,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:40,417 INFO L225 Difference]: With dead ends: 63184 [2021-06-05 21:28:40,417 INFO L226 Difference]: Without dead ends: 63184 [2021-06-05 21:28:40,418 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 119.5ms TimeCoverageRelationStatistics Valid=201, Invalid=351, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:28:40,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63184 states. [2021-06-05 21:28:41,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63184 to 59924. [2021-06-05 21:28:41,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59924 states, 59923 states have (on average 2.995427465247067) internal successors, (179495), 59923 states have internal predecessors, (179495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:41,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59924 states to 59924 states and 179495 transitions. [2021-06-05 21:28:41,831 INFO L78 Accepts]: Start accepts. Automaton has 59924 states and 179495 transitions. Word has length 25 [2021-06-05 21:28:41,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:41,831 INFO L482 AbstractCegarLoop]: Abstraction has 59924 states and 179495 transitions. [2021-06-05 21:28:41,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:41,831 INFO L276 IsEmpty]: Start isEmpty. Operand 59924 states and 179495 transitions. [2021-06-05 21:28:41,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:28:41,872 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:41,872 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:42,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20229,429 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:42,072 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:42,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:42,073 INFO L82 PathProgramCache]: Analyzing trace with hash 2122541714, now seen corresponding path program 428 times [2021-06-05 21:28:42,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:42,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960458249] [2021-06-05 21:28:42,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:42,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:42,152 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:42,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:42,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960458249] [2021-06-05 21:28:42,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960458249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:42,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199151615] [2021-06-05 21:28:42,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:42,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:28:42,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:42,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:28:42,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:42,223 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:42,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199151615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:42,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:42,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 21:28:42,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423729940] [2021-06-05 21:28:42,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:42,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:42,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:42,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:42,223 INFO L87 Difference]: Start difference. First operand 59924 states and 179495 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:42,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:42,665 INFO L93 Difference]: Finished difference Result 90970 states and 272969 transitions. [2021-06-05 21:28:42,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:28:42,665 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:28:42,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:42,839 INFO L225 Difference]: With dead ends: 90970 [2021-06-05 21:28:42,840 INFO L226 Difference]: Without dead ends: 90970 [2021-06-05 21:28:42,840 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 158.7ms TimeCoverageRelationStatistics Valid=311, Invalid=559, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:28:42,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90970 states. [2021-06-05 21:28:44,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90970 to 87092. [2021-06-05 21:28:44,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87092 states, 87091 states have (on average 3.022287033103306) internal successors, (263214), 87091 states have internal predecessors, (263214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:44,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87092 states to 87092 states and 263214 transitions. [2021-06-05 21:28:44,978 INFO L78 Accepts]: Start accepts. Automaton has 87092 states and 263214 transitions. Word has length 25 [2021-06-05 21:28:44,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:44,979 INFO L482 AbstractCegarLoop]: Abstraction has 87092 states and 263214 transitions. [2021-06-05 21:28:44,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:44,979 INFO L276 IsEmpty]: Start isEmpty. Operand 87092 states and 263214 transitions. [2021-06-05 21:28:45,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:28:45,058 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:45,058 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:45,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 430 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20230 [2021-06-05 21:28:45,258 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:45,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:45,258 INFO L82 PathProgramCache]: Analyzing trace with hash -195102390, now seen corresponding path program 429 times [2021-06-05 21:28:45,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:45,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134423460] [2021-06-05 21:28:45,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:45,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:45,330 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 34 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:28:45,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:45,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134423460] [2021-06-05 21:28:45,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134423460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:45,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286039526] [2021-06-05 21:28:45,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:45,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 21:28:45,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:45,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:28:45,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:45,723 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 37 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:28:45,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286039526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:45,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:45,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:28:45,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525035851] [2021-06-05 21:28:45,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:28:45,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:45,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:28:45,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:28:45,724 INFO L87 Difference]: Start difference. First operand 87092 states and 263214 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:46,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:46,093 INFO L93 Difference]: Finished difference Result 87908 states and 264688 transitions. [2021-06-05 21:28:46,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:28:46,093 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:28:46,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:46,254 INFO L225 Difference]: With dead ends: 87908 [2021-06-05 21:28:46,255 INFO L226 Difference]: Without dead ends: 87908 [2021-06-05 21:28:46,255 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 114.1ms TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:28:46,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87908 states. [2021-06-05 21:28:47,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87908 to 87088. [2021-06-05 21:28:47,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87088 states, 87087 states have (on average 3.0224832638625743) internal successors, (263219), 87087 states have internal predecessors, (263219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:48,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87088 states to 87088 states and 263219 transitions. [2021-06-05 21:28:48,143 INFO L78 Accepts]: Start accepts. Automaton has 87088 states and 263219 transitions. Word has length 25 [2021-06-05 21:28:48,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:48,143 INFO L482 AbstractCegarLoop]: Abstraction has 87088 states and 263219 transitions. [2021-06-05 21:28:48,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:48,143 INFO L276 IsEmpty]: Start isEmpty. Operand 87088 states and 263219 transitions. [2021-06-05 21:28:48,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:28:48,222 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:48,222 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:48,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20231 [2021-06-05 21:28:48,423 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:48,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:48,423 INFO L82 PathProgramCache]: Analyzing trace with hash 342753188, now seen corresponding path program 430 times [2021-06-05 21:28:48,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:48,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397135915] [2021-06-05 21:28:48,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:48,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:48,499 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:48,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:48,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397135915] [2021-06-05 21:28:48,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397135915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:48,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974381900] [2021-06-05 21:28:48,500 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:48,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:28:48,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:48,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:28:48,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:48,569 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 32 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:48,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974381900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:48,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:48,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 21:28:48,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391120845] [2021-06-05 21:28:48,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:48,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:48,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:48,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:48,569 INFO L87 Difference]: Start difference. First operand 87088 states and 263219 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:48,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:48,970 INFO L93 Difference]: Finished difference Result 94912 states and 285142 transitions. [2021-06-05 21:28:48,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:28:48,971 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:28:48,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:49,154 INFO L225 Difference]: With dead ends: 94912 [2021-06-05 21:28:49,154 INFO L226 Difference]: Without dead ends: 94912 [2021-06-05 21:28:49,154 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 112.4ms TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:28:49,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94912 states. [2021-06-05 21:28:50,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94912 to 56562. [2021-06-05 21:28:51,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56562 states, 56561 states have (on average 2.9879068616184297) internal successors, (168999), 56561 states have internal predecessors, (168999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:51,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56562 states to 56562 states and 168999 transitions. [2021-06-05 21:28:51,169 INFO L78 Accepts]: Start accepts. Automaton has 56562 states and 168999 transitions. Word has length 25 [2021-06-05 21:28:51,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:51,169 INFO L482 AbstractCegarLoop]: Abstraction has 56562 states and 168999 transitions. [2021-06-05 21:28:51,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:51,169 INFO L276 IsEmpty]: Start isEmpty. Operand 56562 states and 168999 transitions. [2021-06-05 21:28:51,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:28:51,213 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:51,213 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:51,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 432 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20232 [2021-06-05 21:28:51,413 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:51,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:51,414 INFO L82 PathProgramCache]: Analyzing trace with hash -163593078, now seen corresponding path program 431 times [2021-06-05 21:28:51,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:51,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071224870] [2021-06-05 21:28:51,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:51,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:51,490 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:51,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:51,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071224870] [2021-06-05 21:28:51,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071224870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:51,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596244351] [2021-06-05 21:28:51,491 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:51,518 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 21:28:51,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:51,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:28:51,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:51,564 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:51,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596244351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:51,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:51,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 21:28:51,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529293975] [2021-06-05 21:28:51,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:28:51,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:51,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:28:51,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:28:51,565 INFO L87 Difference]: Start difference. First operand 56562 states and 168999 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:51,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:51,952 INFO L93 Difference]: Finished difference Result 78230 states and 232047 transitions. [2021-06-05 21:28:51,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:28:51,952 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:28:51,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:52,108 INFO L225 Difference]: With dead ends: 78230 [2021-06-05 21:28:52,109 INFO L226 Difference]: Without dead ends: 78230 [2021-06-05 21:28:52,109 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 156.2ms TimeCoverageRelationStatistics Valid=310, Invalid=560, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:28:52,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78230 states. [2021-06-05 21:28:53,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78230 to 47991. [2021-06-05 21:28:53,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47991 states, 47990 states have (on average 2.974286309647843) internal successors, (142736), 47990 states have internal predecessors, (142736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:53,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47991 states to 47991 states and 142736 transitions. [2021-06-05 21:28:53,579 INFO L78 Accepts]: Start accepts. Automaton has 47991 states and 142736 transitions. Word has length 25 [2021-06-05 21:28:53,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:53,579 INFO L482 AbstractCegarLoop]: Abstraction has 47991 states and 142736 transitions. [2021-06-05 21:28:53,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:53,579 INFO L276 IsEmpty]: Start isEmpty. Operand 47991 states and 142736 transitions. [2021-06-05 21:28:53,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:28:53,620 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:53,620 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:53,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 433 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20233 [2021-06-05 21:28:53,821 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:53,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:53,821 INFO L82 PathProgramCache]: Analyzing trace with hash 76191076, now seen corresponding path program 432 times [2021-06-05 21:28:53,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:53,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935527222] [2021-06-05 21:28:53,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:53,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:53,873 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 34 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:28:53,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:53,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935527222] [2021-06-05 21:28:53,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935527222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:53,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232449912] [2021-06-05 21:28:53,873 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:53,900 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 21:28:53,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:53,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:28:53,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:53,939 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 37 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:28:53,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232449912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:53,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:53,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:28:53,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665536434] [2021-06-05 21:28:53,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:28:53,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:53,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:28:53,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:28:53,940 INFO L87 Difference]: Start difference. First operand 47991 states and 142736 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:54,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:54,235 INFO L93 Difference]: Finished difference Result 48514 states and 143403 transitions. [2021-06-05 21:28:54,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:28:54,235 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:28:54,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:54,314 INFO L225 Difference]: With dead ends: 48514 [2021-06-05 21:28:54,314 INFO L226 Difference]: Without dead ends: 48510 [2021-06-05 21:28:54,314 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 113.5ms TimeCoverageRelationStatistics Valid=212, Invalid=388, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:28:54,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48510 states. [2021-06-05 21:28:55,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48510 to 47991. [2021-06-05 21:28:55,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47991 states, 47990 states have (on average 2.9742029589497814) internal successors, (142732), 47990 states have internal predecessors, (142732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:55,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47991 states to 47991 states and 142732 transitions. [2021-06-05 21:28:55,443 INFO L78 Accepts]: Start accepts. Automaton has 47991 states and 142732 transitions. Word has length 25 [2021-06-05 21:28:55,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:55,443 INFO L482 AbstractCegarLoop]: Abstraction has 47991 states and 142732 transitions. [2021-06-05 21:28:55,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:55,443 INFO L276 IsEmpty]: Start isEmpty. Operand 47991 states and 142732 transitions. [2021-06-05 21:28:55,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:28:55,482 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:55,482 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:55,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20234,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:55,682 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:55,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:55,683 INFO L82 PathProgramCache]: Analyzing trace with hash -800059932, now seen corresponding path program 433 times [2021-06-05 21:28:55,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:55,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214244915] [2021-06-05 21:28:55,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:55,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:55,780 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:55,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:55,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214244915] [2021-06-05 21:28:55,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214244915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:55,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821417344] [2021-06-05 21:28:55,780 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:55,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:55,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:28:55,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:55,862 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:55,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821417344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:55,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:55,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 21:28:55,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620738653] [2021-06-05 21:28:55,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:28:55,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:55,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:28:55,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:28:55,863 INFO L87 Difference]: Start difference. First operand 47991 states and 142732 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:56,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:56,202 INFO L93 Difference]: Finished difference Result 56834 states and 167301 transitions. [2021-06-05 21:28:56,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:28:56,202 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:28:56,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:56,300 INFO L225 Difference]: With dead ends: 56834 [2021-06-05 21:28:56,300 INFO L226 Difference]: Without dead ends: 56834 [2021-06-05 21:28:56,300 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 168.5ms TimeCoverageRelationStatistics Valid=313, Invalid=557, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:28:56,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56834 states. [2021-06-05 21:28:57,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56834 to 38382. [2021-06-05 21:28:57,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38382 states, 38381 states have (on average 2.965660092233136) internal successors, (113825), 38381 states have internal predecessors, (113825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:57,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38382 states to 38382 states and 113825 transitions. [2021-06-05 21:28:57,355 INFO L78 Accepts]: Start accepts. Automaton has 38382 states and 113825 transitions. Word has length 25 [2021-06-05 21:28:57,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:57,355 INFO L482 AbstractCegarLoop]: Abstraction has 38382 states and 113825 transitions. [2021-06-05 21:28:57,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:57,355 INFO L276 IsEmpty]: Start isEmpty. Operand 38382 states and 113825 transitions. [2021-06-05 21:28:57,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:28:57,394 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:57,394 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:57,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 435 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20235 [2021-06-05 21:28:57,595 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:57,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:57,595 INFO L82 PathProgramCache]: Analyzing trace with hash -26868346, now seen corresponding path program 434 times [2021-06-05 21:28:57,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:57,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758754141] [2021-06-05 21:28:57,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:57,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:57,652 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 40 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:57,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:57,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758754141] [2021-06-05 21:28:57,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758754141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:57,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933382025] [2021-06-05 21:28:57,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:57,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:28:57,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:57,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:28:57,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:57,716 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 45 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:28:57,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933382025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:57,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:57,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:28:57,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754382215] [2021-06-05 21:28:57,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:28:57,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:57,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:28:57,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:28:57,717 INFO L87 Difference]: Start difference. First operand 38382 states and 113825 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:58,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:58,208 INFO L93 Difference]: Finished difference Result 38968 states and 114634 transitions. [2021-06-05 21:28:58,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:28:58,208 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:28:58,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:58,268 INFO L225 Difference]: With dead ends: 38968 [2021-06-05 21:28:58,268 INFO L226 Difference]: Without dead ends: 38964 [2021-06-05 21:28:58,268 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 118.7ms TimeCoverageRelationStatistics Valid=242, Invalid=408, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:28:58,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38964 states. [2021-06-05 21:28:58,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38964 to 38396. [2021-06-05 21:28:58,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38396 states, 38395 states have (on average 2.9655684333897643) internal successors, (113863), 38395 states have internal predecessors, (113863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:58,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38396 states to 38396 states and 113863 transitions. [2021-06-05 21:28:58,921 INFO L78 Accepts]: Start accepts. Automaton has 38396 states and 113863 transitions. Word has length 25 [2021-06-05 21:28:58,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:28:58,921 INFO L482 AbstractCegarLoop]: Abstraction has 38396 states and 113863 transitions. [2021-06-05 21:28:58,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:58,921 INFO L276 IsEmpty]: Start isEmpty. Operand 38396 states and 113863 transitions. [2021-06-05 21:28:58,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:28:58,957 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:28:58,957 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:28:59,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20236,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:59,157 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:28:59,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:28:59,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1690880714, now seen corresponding path program 435 times [2021-06-05 21:28:59,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:28:59,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184565163] [2021-06-05 21:28:59,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:28:59,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:28:59,420 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-06-05 21:28:59,431 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 39 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:59,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:28:59,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184565163] [2021-06-05 21:28:59,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184565163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:59,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128335332] [2021-06-05 21:28:59,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:28:59,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 21:28:59,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:28:59,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:28:59,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:28:59,504 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 44 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:28:59,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128335332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:28:59,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:28:59,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:28:59,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725351701] [2021-06-05 21:28:59,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:28:59,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:28:59,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:28:59,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:28:59,505 INFO L87 Difference]: Start difference. First operand 38396 states and 113863 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:28:59,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:28:59,684 INFO L93 Difference]: Finished difference Result 41573 states and 121933 transitions. [2021-06-05 21:28:59,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:28:59,684 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:28:59,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:28:59,745 INFO L225 Difference]: With dead ends: 41573 [2021-06-05 21:28:59,745 INFO L226 Difference]: Without dead ends: 41573 [2021-06-05 21:28:59,746 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 73.7ms TimeCoverageRelationStatistics Valid=144, Invalid=198, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:28:59,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41573 states. [2021-06-05 21:29:00,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41573 to 38413. [2021-06-05 21:29:00,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38413 states, 38412 states have (on average 2.9653493699885454) internal successors, (113905), 38412 states have internal predecessors, (113905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:00,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38413 states to 38413 states and 113905 transitions. [2021-06-05 21:29:00,634 INFO L78 Accepts]: Start accepts. Automaton has 38413 states and 113905 transitions. Word has length 25 [2021-06-05 21:29:00,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:00,634 INFO L482 AbstractCegarLoop]: Abstraction has 38413 states and 113905 transitions. [2021-06-05 21:29:00,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:00,634 INFO L276 IsEmpty]: Start isEmpty. Operand 38413 states and 113905 transitions. [2021-06-05 21:29:00,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:29:00,665 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:00,665 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:00,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 437 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20237 [2021-06-05 21:29:00,865 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:00,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:00,866 INFO L82 PathProgramCache]: Analyzing trace with hash -38166620, now seen corresponding path program 436 times [2021-06-05 21:29:00,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:00,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198853241] [2021-06-05 21:29:00,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:00,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:00,929 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 35 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:29:00,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:00,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198853241] [2021-06-05 21:29:00,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198853241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:00,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001273334] [2021-06-05 21:29:00,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:00,955 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:29:00,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:00,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:29:00,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:01,009 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 39 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:29:01,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001273334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:01,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:01,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:29:01,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365594131] [2021-06-05 21:29:01,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:29:01,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:01,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:29:01,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:29:01,010 INFO L87 Difference]: Start difference. First operand 38413 states and 113905 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:01,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:01,246 INFO L93 Difference]: Finished difference Result 43427 states and 127338 transitions. [2021-06-05 21:29:01,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:29:01,246 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:29:01,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:01,322 INFO L225 Difference]: With dead ends: 43427 [2021-06-05 21:29:01,322 INFO L226 Difference]: Without dead ends: 43427 [2021-06-05 21:29:01,323 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 98.3ms TimeCoverageRelationStatistics Valid=183, Invalid=279, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:29:01,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43427 states. [2021-06-05 21:29:02,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43427 to 38418. [2021-06-05 21:29:02,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38418 states, 38417 states have (on average 2.965197698935367) internal successors, (113914), 38417 states have internal predecessors, (113914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:02,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38418 states to 38418 states and 113914 transitions. [2021-06-05 21:29:02,256 INFO L78 Accepts]: Start accepts. Automaton has 38418 states and 113914 transitions. Word has length 25 [2021-06-05 21:29:02,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:02,256 INFO L482 AbstractCegarLoop]: Abstraction has 38418 states and 113914 transitions. [2021-06-05 21:29:02,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:02,256 INFO L276 IsEmpty]: Start isEmpty. Operand 38418 states and 113914 transitions. [2021-06-05 21:29:02,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:29:02,295 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:02,295 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:02,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20238,438 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:02,496 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:02,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:02,496 INFO L82 PathProgramCache]: Analyzing trace with hash -2099026422, now seen corresponding path program 437 times [2021-06-05 21:29:02,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:02,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275099045] [2021-06-05 21:29:02,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:02,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:02,562 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 32 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:02,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:02,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275099045] [2021-06-05 21:29:02,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275099045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:02,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064031679] [2021-06-05 21:29:02,562 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:02,589 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 21:29:02,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:02,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:29:02,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:02,638 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 35 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:02,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064031679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:02,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:02,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:29:02,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826131487] [2021-06-05 21:29:02,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:29:02,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:02,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:29:02,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:29:02,639 INFO L87 Difference]: Start difference. First operand 38418 states and 113914 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:02,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:02,869 INFO L93 Difference]: Finished difference Result 42897 states and 125903 transitions. [2021-06-05 21:29:02,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:29:02,870 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:29:02,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:02,937 INFO L225 Difference]: With dead ends: 42897 [2021-06-05 21:29:02,937 INFO L226 Difference]: Without dead ends: 42897 [2021-06-05 21:29:02,938 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 99.8ms TimeCoverageRelationStatistics Valid=191, Invalid=315, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:29:02,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42897 states. [2021-06-05 21:29:03,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42897 to 38354. [2021-06-05 21:29:03,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38354 states, 38353 states have (on average 2.964644226005788) internal successors, (113703), 38353 states have internal predecessors, (113703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:03,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38354 states to 38354 states and 113703 transitions. [2021-06-05 21:29:03,850 INFO L78 Accepts]: Start accepts. Automaton has 38354 states and 113703 transitions. Word has length 25 [2021-06-05 21:29:03,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:03,850 INFO L482 AbstractCegarLoop]: Abstraction has 38354 states and 113703 transitions. [2021-06-05 21:29:03,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:03,850 INFO L276 IsEmpty]: Start isEmpty. Operand 38354 states and 113703 transitions. [2021-06-05 21:29:03,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:29:03,884 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:03,884 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:04,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20239,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:04,085 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:04,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:04,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1561170844, now seen corresponding path program 438 times [2021-06-05 21:29:04,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:04,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80162305] [2021-06-05 21:29:04,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:04,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:04,163 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:29:04,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:04,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80162305] [2021-06-05 21:29:04,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80162305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:04,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155081107] [2021-06-05 21:29:04,163 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:04,190 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 21:29:04,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:04,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:29:04,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:04,240 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:29:04,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155081107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:04,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:04,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:29:04,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971308164] [2021-06-05 21:29:04,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:29:04,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:04,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:29:04,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:29:04,241 INFO L87 Difference]: Start difference. First operand 38354 states and 113703 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:04,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:04,503 INFO L93 Difference]: Finished difference Result 63716 states and 189177 transitions. [2021-06-05 21:29:04,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:29:04,503 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:29:04,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:04,617 INFO L225 Difference]: With dead ends: 63716 [2021-06-05 21:29:04,617 INFO L226 Difference]: Without dead ends: 63716 [2021-06-05 21:29:04,617 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 97.9ms TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:29:04,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63716 states. [2021-06-05 21:29:05,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63716 to 58655. [2021-06-05 21:29:05,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58655 states, 58654 states have (on average 2.9932314931632966) internal successors, (175565), 58654 states have internal predecessors, (175565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:05,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58655 states to 58655 states and 175565 transitions. [2021-06-05 21:29:05,870 INFO L78 Accepts]: Start accepts. Automaton has 58655 states and 175565 transitions. Word has length 25 [2021-06-05 21:29:05,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:05,870 INFO L482 AbstractCegarLoop]: Abstraction has 58655 states and 175565 transitions. [2021-06-05 21:29:05,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:05,870 INFO L276 IsEmpty]: Start isEmpty. Operand 58655 states and 175565 transitions. [2021-06-05 21:29:05,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:29:05,917 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:05,917 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:06,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20240,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:06,118 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:06,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:06,118 INFO L82 PathProgramCache]: Analyzing trace with hash -2067517110, now seen corresponding path program 439 times [2021-06-05 21:29:06,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:06,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526574756] [2021-06-05 21:29:06,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:06,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:06,195 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:06,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:06,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526574756] [2021-06-05 21:29:06,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526574756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:06,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814088230] [2021-06-05 21:29:06,195 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:06,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:06,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:29:06,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:06,270 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:06,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814088230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:06,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:06,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 21:29:06,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126392791] [2021-06-05 21:29:06,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:29:06,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:06,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:29:06,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:29:06,271 INFO L87 Difference]: Start difference. First operand 58655 states and 175565 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:06,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:06,875 INFO L93 Difference]: Finished difference Result 65878 states and 195353 transitions. [2021-06-05 21:29:06,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:29:06,875 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:29:06,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:07,003 INFO L225 Difference]: With dead ends: 65878 [2021-06-05 21:29:07,004 INFO L226 Difference]: Without dead ends: 65878 [2021-06-05 21:29:07,004 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 133.5ms TimeCoverageRelationStatistics Valid=247, Invalid=455, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:29:07,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65878 states. [2021-06-05 21:29:08,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65878 to 58492. [2021-06-05 21:29:08,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58492 states, 58491 states have (on average 2.992528765109162) internal successors, (175036), 58491 states have internal predecessors, (175036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:08,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58492 states to 58492 states and 175036 transitions. [2021-06-05 21:29:08,295 INFO L78 Accepts]: Start accepts. Automaton has 58492 states and 175036 transitions. Word has length 25 [2021-06-05 21:29:08,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:08,295 INFO L482 AbstractCegarLoop]: Abstraction has 58492 states and 175036 transitions. [2021-06-05 21:29:08,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:08,295 INFO L276 IsEmpty]: Start isEmpty. Operand 58492 states and 175036 transitions. [2021-06-05 21:29:08,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:29:08,341 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:08,341 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:08,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20241 [2021-06-05 21:29:08,542 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:08,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:08,542 INFO L82 PathProgramCache]: Analyzing trace with hash -584382172, now seen corresponding path program 440 times [2021-06-05 21:29:08,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:08,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734056747] [2021-06-05 21:29:08,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:08,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:08,627 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:08,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:08,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734056747] [2021-06-05 21:29:08,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734056747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:08,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284268512] [2021-06-05 21:29:08,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:08,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:29:08,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:08,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:29:08,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:08,704 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:08,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284268512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:08,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:08,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 21:29:08,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265230726] [2021-06-05 21:29:08,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:29:08,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:08,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:29:08,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:29:08,705 INFO L87 Difference]: Start difference. First operand 58492 states and 175036 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:09,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:09,195 INFO L93 Difference]: Finished difference Result 92257 states and 276233 transitions. [2021-06-05 21:29:09,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 21:29:09,195 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:29:09,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:09,375 INFO L225 Difference]: With dead ends: 92257 [2021-06-05 21:29:09,375 INFO L226 Difference]: Without dead ends: 92257 [2021-06-05 21:29:09,376 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 200.4ms TimeCoverageRelationStatistics Valid=418, Invalid=772, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:29:09,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92257 states. [2021-06-05 21:29:10,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92257 to 82743. [2021-06-05 21:29:11,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82743 states, 82742 states have (on average 3.0198569045950063) internal successors, (249869), 82742 states have internal predecessors, (249869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:11,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82743 states to 82743 states and 249869 transitions. [2021-06-05 21:29:11,246 INFO L78 Accepts]: Start accepts. Automaton has 82743 states and 249869 transitions. Word has length 25 [2021-06-05 21:29:11,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:11,246 INFO L482 AbstractCegarLoop]: Abstraction has 82743 states and 249869 transitions. [2021-06-05 21:29:11,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:11,246 INFO L276 IsEmpty]: Start isEmpty. Operand 82743 states and 249869 transitions. [2021-06-05 21:29:11,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:29:11,320 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:11,320 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:11,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20242,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:11,521 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:11,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:11,521 INFO L82 PathProgramCache]: Analyzing trace with hash 583094636, now seen corresponding path program 441 times [2021-06-05 21:29:11,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:11,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998236379] [2021-06-05 21:29:11,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:11,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:11,593 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:29:11,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:11,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998236379] [2021-06-05 21:29:11,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998236379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:11,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050397979] [2021-06-05 21:29:11,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:11,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 21:29:11,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:11,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:29:11,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:11,666 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 34 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:29:11,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050397979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:11,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:11,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 21:29:11,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535782613] [2021-06-05 21:29:11,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:29:11,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:11,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:29:11,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:29:11,667 INFO L87 Difference]: Start difference. First operand 82743 states and 249869 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:12,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:12,017 INFO L93 Difference]: Finished difference Result 83322 states and 250595 transitions. [2021-06-05 21:29:12,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:29:12,017 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:29:12,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:12,563 INFO L225 Difference]: With dead ends: 83322 [2021-06-05 21:29:12,563 INFO L226 Difference]: Without dead ends: 83321 [2021-06-05 21:29:12,563 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 89.7ms TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:29:12,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83321 states. [2021-06-05 21:29:13,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83321 to 82266. [2021-06-05 21:29:14,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82266 states, 82265 states have (on average 3.0184768735185075) internal successors, (248315), 82265 states have internal predecessors, (248315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:14,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82266 states to 82266 states and 248315 transitions. [2021-06-05 21:29:14,288 INFO L78 Accepts]: Start accepts. Automaton has 82266 states and 248315 transitions. Word has length 25 [2021-06-05 21:29:14,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:14,288 INFO L482 AbstractCegarLoop]: Abstraction has 82266 states and 248315 transitions. [2021-06-05 21:29:14,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:14,289 INFO L276 IsEmpty]: Start isEmpty. Operand 82266 states and 248315 transitions. [2021-06-05 21:29:14,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:29:14,361 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:14,361 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:14,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 443 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20243 [2021-06-05 21:29:14,577 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:14,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:14,577 INFO L82 PathProgramCache]: Analyzing trace with hash 76748370, now seen corresponding path program 442 times [2021-06-05 21:29:14,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:14,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099857250] [2021-06-05 21:29:14,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:14,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:14,655 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:14,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:14,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099857250] [2021-06-05 21:29:14,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099857250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:14,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527037797] [2021-06-05 21:29:14,656 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:14,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:29:14,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:14,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:29:14,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:14,723 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:14,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527037797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:14,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:14,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-05 21:29:14,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204911847] [2021-06-05 21:29:14,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:29:14,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:14,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:29:14,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:29:14,724 INFO L87 Difference]: Start difference. First operand 82266 states and 248315 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:15,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:15,145 INFO L93 Difference]: Finished difference Result 90893 states and 272842 transitions. [2021-06-05 21:29:15,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:29:15,145 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:29:15,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:15,736 INFO L225 Difference]: With dead ends: 90893 [2021-06-05 21:29:15,736 INFO L226 Difference]: Without dead ends: 90893 [2021-06-05 21:29:15,736 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 127.7ms TimeCoverageRelationStatistics Valid=246, Invalid=456, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:29:15,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90893 states. [2021-06-05 21:29:16,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90893 to 54760. [2021-06-05 21:29:16,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54760 states, 54759 states have (on average 2.982103398528096) internal successors, (163297), 54759 states have internal predecessors, (163297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:17,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54760 states to 54760 states and 163297 transitions. [2021-06-05 21:29:17,030 INFO L78 Accepts]: Start accepts. Automaton has 54760 states and 163297 transitions. Word has length 25 [2021-06-05 21:29:17,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:17,030 INFO L482 AbstractCegarLoop]: Abstraction has 54760 states and 163297 transitions. [2021-06-05 21:29:17,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:17,031 INFO L276 IsEmpty]: Start isEmpty. Operand 54760 states and 163297 transitions. [2021-06-05 21:29:17,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:29:17,073 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:17,073 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:17,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20244,444 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:17,273 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:17,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:17,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1559883308, now seen corresponding path program 443 times [2021-06-05 21:29:17,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:17,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784284999] [2021-06-05 21:29:17,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:17,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:17,355 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:17,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:17,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784284999] [2021-06-05 21:29:17,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784284999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:17,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591316476] [2021-06-05 21:29:17,356 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:17,383 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 21:29:17,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:17,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:29:17,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:17,426 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:17,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591316476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:17,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:17,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-05 21:29:17,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808378776] [2021-06-05 21:29:17,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:29:17,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:17,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:29:17,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:29:17,427 INFO L87 Difference]: Start difference. First operand 54760 states and 163297 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:17,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:17,866 INFO L93 Difference]: Finished difference Result 77734 states and 230348 transitions. [2021-06-05 21:29:17,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:29:17,866 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:29:17,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:18,013 INFO L225 Difference]: With dead ends: 77734 [2021-06-05 21:29:18,013 INFO L226 Difference]: Without dead ends: 77734 [2021-06-05 21:29:18,014 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 192.9ms TimeCoverageRelationStatistics Valid=417, Invalid=773, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:29:18,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77734 states. [2021-06-05 21:29:19,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77734 to 43949. [2021-06-05 21:29:19,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43949 states, 43948 states have (on average 2.969532174387913) internal successors, (130505), 43948 states have internal predecessors, (130505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:19,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43949 states to 43949 states and 130505 transitions. [2021-06-05 21:29:19,291 INFO L78 Accepts]: Start accepts. Automaton has 43949 states and 130505 transitions. Word has length 25 [2021-06-05 21:29:19,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:19,291 INFO L482 AbstractCegarLoop]: Abstraction has 43949 states and 130505 transitions. [2021-06-05 21:29:19,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:19,291 INFO L276 IsEmpty]: Start isEmpty. Operand 43949 states and 130505 transitions. [2021-06-05 21:29:19,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:29:19,334 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:19,334 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:19,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20245 [2021-06-05 21:29:19,534 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:19,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:19,535 INFO L82 PathProgramCache]: Analyzing trace with hash -990719982, now seen corresponding path program 444 times [2021-06-05 21:29:19,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:19,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927577844] [2021-06-05 21:29:19,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:19,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:19,636 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:19,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:19,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927577844] [2021-06-05 21:29:19,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927577844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:19,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021465508] [2021-06-05 21:29:19,637 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:19,672 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 21:29:19,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:19,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:29:19,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:19,725 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:19,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021465508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:19,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:19,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-05 21:29:19,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441292842] [2021-06-05 21:29:19,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:29:19,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:19,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:29:19,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:29:19,726 INFO L87 Difference]: Start difference. First operand 43949 states and 130505 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:20,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:20,458 INFO L93 Difference]: Finished difference Result 74263 states and 220319 transitions. [2021-06-05 21:29:20,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:29:20,459 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:29:20,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:20,615 INFO L225 Difference]: With dead ends: 74263 [2021-06-05 21:29:20,615 INFO L226 Difference]: Without dead ends: 74263 [2021-06-05 21:29:20,615 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 510.5ms TimeCoverageRelationStatistics Valid=370, Invalid=686, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:29:20,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74263 states. [2021-06-05 21:29:21,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74263 to 67922. [2021-06-05 21:29:21,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67922 states, 67921 states have (on average 2.9886780229973056) internal successors, (202994), 67921 states have internal predecessors, (202994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:22,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67922 states to 67922 states and 202994 transitions. [2021-06-05 21:29:22,061 INFO L78 Accepts]: Start accepts. Automaton has 67922 states and 202994 transitions. Word has length 25 [2021-06-05 21:29:22,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:22,061 INFO L482 AbstractCegarLoop]: Abstraction has 67922 states and 202994 transitions. [2021-06-05 21:29:22,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:22,061 INFO L276 IsEmpty]: Start isEmpty. Operand 67922 states and 202994 transitions. [2021-06-05 21:29:22,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:29:22,112 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:22,112 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:22,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 446 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20246 [2021-06-05 21:29:22,313 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:22,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:22,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1069673010, now seen corresponding path program 445 times [2021-06-05 21:29:22,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:22,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403913737] [2021-06-05 21:29:22,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:22,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:22,370 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 37 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:22,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:22,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403913737] [2021-06-05 21:29:22,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403913737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:22,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610640028] [2021-06-05 21:29:22,370 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:22,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:22,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:29:22,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:22,434 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 43 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:29:22,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610640028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:22,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:22,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:29:22,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861144510] [2021-06-05 21:29:22,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:29:22,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:22,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:29:22,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:29:22,434 INFO L87 Difference]: Start difference. First operand 67922 states and 202994 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:23,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:23,125 INFO L93 Difference]: Finished difference Result 68435 states and 203689 transitions. [2021-06-05 21:29:23,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:29:23,125 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:29:23,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:23,252 INFO L225 Difference]: With dead ends: 68435 [2021-06-05 21:29:23,253 INFO L226 Difference]: Without dead ends: 68431 [2021-06-05 21:29:23,253 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 117.4ms TimeCoverageRelationStatistics Valid=241, Invalid=409, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:29:23,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68431 states. [2021-06-05 21:29:24,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68431 to 67936. [2021-06-05 21:29:24,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67936 states, 67935 states have (on average 2.988253477588872) internal successors, (203007), 67935 states have internal predecessors, (203007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:24,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67936 states to 67936 states and 203007 transitions. [2021-06-05 21:29:24,609 INFO L78 Accepts]: Start accepts. Automaton has 67936 states and 203007 transitions. Word has length 25 [2021-06-05 21:29:24,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:24,609 INFO L482 AbstractCegarLoop]: Abstraction has 67936 states and 203007 transitions. [2021-06-05 21:29:24,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:24,609 INFO L276 IsEmpty]: Start isEmpty. Operand 67936 states and 203007 transitions. [2021-06-05 21:29:24,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:29:24,656 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:24,656 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:24,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 447 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20247 [2021-06-05 21:29:24,857 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:24,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:24,857 INFO L82 PathProgramCache]: Analyzing trace with hash 648076050, now seen corresponding path program 446 times [2021-06-05 21:29:24,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:24,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243386223] [2021-06-05 21:29:24,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:24,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:24,913 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 36 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:29:24,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:24,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243386223] [2021-06-05 21:29:24,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243386223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:24,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460721750] [2021-06-05 21:29:24,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:24,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:29:24,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:24,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:29:24,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:24,982 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 42 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:29:24,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460721750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:24,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:24,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:29:24,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526373131] [2021-06-05 21:29:24,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:29:24,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:24,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:29:24,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:29:24,983 INFO L87 Difference]: Start difference. First operand 67936 states and 203007 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:25,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:25,298 INFO L93 Difference]: Finished difference Result 74376 states and 220879 transitions. [2021-06-05 21:29:25,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:29:25,299 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:29:25,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:25,420 INFO L225 Difference]: With dead ends: 74376 [2021-06-05 21:29:25,420 INFO L226 Difference]: Without dead ends: 74376 [2021-06-05 21:29:25,420 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 76.7ms TimeCoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:29:25,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74376 states. [2021-06-05 21:29:27,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74376 to 67967. [2021-06-05 21:29:27,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67967 states, 67966 states have (on average 2.988155842627196) internal successors, (203093), 67966 states have internal predecessors, (203093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:27,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67967 states to 67967 states and 203093 transitions. [2021-06-05 21:29:27,279 INFO L78 Accepts]: Start accepts. Automaton has 67967 states and 203093 transitions. Word has length 25 [2021-06-05 21:29:27,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:27,279 INFO L482 AbstractCegarLoop]: Abstraction has 67967 states and 203093 transitions. [2021-06-05 21:29:27,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:27,279 INFO L276 IsEmpty]: Start isEmpty. Operand 67967 states and 203093 transitions. [2021-06-05 21:29:27,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:29:27,329 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:27,329 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:27,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 448 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20248 [2021-06-05 21:29:27,530 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:27,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:27,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1080971284, now seen corresponding path program 447 times [2021-06-05 21:29:27,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:27,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984502015] [2021-06-05 21:29:27,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:27,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:27,593 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 34 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:27,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:27,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984502015] [2021-06-05 21:29:27,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984502015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:27,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13706049] [2021-06-05 21:29:27,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:27,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:29:27,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:27,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:29:27,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:27,667 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 39 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:27,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13706049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:27,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:27,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:29:27,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861475679] [2021-06-05 21:29:27,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:29:27,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:27,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:29:27,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:29:27,668 INFO L87 Difference]: Start difference. First operand 67967 states and 203093 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:28,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:28,015 INFO L93 Difference]: Finished difference Result 78884 states and 234170 transitions. [2021-06-05 21:29:28,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:29:28,015 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:29:28,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:28,160 INFO L225 Difference]: With dead ends: 78884 [2021-06-05 21:29:28,160 INFO L226 Difference]: Without dead ends: 78884 [2021-06-05 21:29:28,160 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 103.6ms TimeCoverageRelationStatistics Valid=215, Invalid=337, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:29:28,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78884 states. [2021-06-05 21:29:29,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78884 to 67988. [2021-06-05 21:29:29,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67988 states, 67987 states have (on average 2.988071248915234) internal successors, (203150), 67987 states have internal predecessors, (203150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:30,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67988 states to 67988 states and 203150 transitions. [2021-06-05 21:29:30,057 INFO L78 Accepts]: Start accepts. Automaton has 67988 states and 203150 transitions. Word has length 25 [2021-06-05 21:29:30,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:30,057 INFO L482 AbstractCegarLoop]: Abstraction has 67988 states and 203150 transitions. [2021-06-05 21:29:30,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:30,058 INFO L276 IsEmpty]: Start isEmpty. Operand 67988 states and 203150 transitions. [2021-06-05 21:29:30,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:29:30,116 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:30,116 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:30,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20249,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:30,316 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:30,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:30,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1153136210, now seen corresponding path program 448 times [2021-06-05 21:29:30,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:30,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164278030] [2021-06-05 21:29:30,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:30,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:30,387 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:29:30,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:30,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164278030] [2021-06-05 21:29:30,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164278030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:30,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47000275] [2021-06-05 21:29:30,387 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:30,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:29:30,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:30,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:29:30,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:30,463 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 35 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:29:30,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47000275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:30,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:30,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:29:30,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541506756] [2021-06-05 21:29:30,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:29:30,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:30,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:29:30,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:29:30,464 INFO L87 Difference]: Start difference. First operand 67988 states and 203150 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:30,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:30,941 INFO L93 Difference]: Finished difference Result 114424 states and 344057 transitions. [2021-06-05 21:29:30,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:29:30,941 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:29:30,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:31,178 INFO L225 Difference]: With dead ends: 114424 [2021-06-05 21:29:31,179 INFO L226 Difference]: Without dead ends: 114424 [2021-06-05 21:29:31,179 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 122.6ms TimeCoverageRelationStatistics Valid=224, Invalid=376, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:29:31,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114424 states. [2021-06-05 21:29:33,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114424 to 104105. [2021-06-05 21:29:33,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104105 states, 104104 states have (on average 3.02537846768616) internal successors, (314954), 104104 states have internal predecessors, (314954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:33,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104105 states to 104105 states and 314954 transitions. [2021-06-05 21:29:33,505 INFO L78 Accepts]: Start accepts. Automaton has 104105 states and 314954 transitions. Word has length 25 [2021-06-05 21:29:33,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:33,505 INFO L482 AbstractCegarLoop]: Abstraction has 104105 states and 314954 transitions. [2021-06-05 21:29:33,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:33,505 INFO L276 IsEmpty]: Start isEmpty. Operand 104105 states and 314954 transitions. [2021-06-05 21:29:33,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:29:33,578 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:33,578 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:33,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20250,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:33,779 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:33,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:33,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1690991788, now seen corresponding path program 449 times [2021-06-05 21:29:33,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:33,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722036985] [2021-06-05 21:29:33,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:33,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:33,852 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 29 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:33,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:33,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722036985] [2021-06-05 21:29:33,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722036985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:33,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547217986] [2021-06-05 21:29:33,853 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:33,880 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 21:29:33,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:33,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:29:33,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:33,925 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 32 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:33,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547217986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:33,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:33,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 21:29:33,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171545625] [2021-06-05 21:29:33,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:29:33,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:33,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:29:33,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:29:33,925 INFO L87 Difference]: Start difference. First operand 104105 states and 314954 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:34,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:34,416 INFO L93 Difference]: Finished difference Result 110268 states and 331729 transitions. [2021-06-05 21:29:34,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:29:34,417 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:29:34,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:35,162 INFO L225 Difference]: With dead ends: 110268 [2021-06-05 21:29:35,162 INFO L226 Difference]: Without dead ends: 110268 [2021-06-05 21:29:35,162 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 116.7ms TimeCoverageRelationStatistics Valid=215, Invalid=385, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:29:35,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110268 states. [2021-06-05 21:29:37,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110268 to 102357. [2021-06-05 21:29:37,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102357 states, 102356 states have (on average 3.0227539176990113) internal successors, (309397), 102356 states have internal predecessors, (309397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:37,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102357 states to 102357 states and 309397 transitions. [2021-06-05 21:29:37,908 INFO L78 Accepts]: Start accepts. Automaton has 102357 states and 309397 transitions. Word has length 25 [2021-06-05 21:29:37,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:37,908 INFO L482 AbstractCegarLoop]: Abstraction has 102357 states and 309397 transitions. [2021-06-05 21:29:37,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:37,908 INFO L276 IsEmpty]: Start isEmpty. Operand 102357 states and 309397 transitions. [2021-06-05 21:29:38,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:29:38,014 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:38,014 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:38,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20251,451 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:38,229 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:38,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:38,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1184645522, now seen corresponding path program 450 times [2021-06-05 21:29:38,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:38,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884185373] [2021-06-05 21:29:38,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:38,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:38,317 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:29:38,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:38,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884185373] [2021-06-05 21:29:38,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884185373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:38,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794883191] [2021-06-05 21:29:38,318 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:38,352 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 21:29:38,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:38,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:29:38,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:38,404 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:29:38,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794883191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:38,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:38,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 21:29:38,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806058703] [2021-06-05 21:29:38,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:29:38,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:38,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:29:38,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:29:38,405 INFO L87 Difference]: Start difference. First operand 102357 states and 309397 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:39,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:39,136 INFO L93 Difference]: Finished difference Result 187580 states and 568248 transitions. [2021-06-05 21:29:39,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:29:39,136 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:29:39,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:39,557 INFO L225 Difference]: With dead ends: 187580 [2021-06-05 21:29:39,558 INFO L226 Difference]: Without dead ends: 187580 [2021-06-05 21:29:39,558 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 123.7ms TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:29:40,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187580 states. [2021-06-05 21:29:42,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187580 to 185975. [2021-06-05 21:29:43,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185975 states, 185974 states have (on average 3.0363814296622107) internal successors, (564688), 185974 states have internal predecessors, (564688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:44,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185975 states to 185975 states and 564688 transitions. [2021-06-05 21:29:44,250 INFO L78 Accepts]: Start accepts. Automaton has 185975 states and 564688 transitions. Word has length 25 [2021-06-05 21:29:44,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:44,251 INFO L482 AbstractCegarLoop]: Abstraction has 185975 states and 564688 transitions. [2021-06-05 21:29:44,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:44,251 INFO L276 IsEmpty]: Start isEmpty. Operand 185975 states and 564688 transitions. [2021-06-05 21:29:44,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:29:44,339 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:44,340 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:44,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20252 [2021-06-05 21:29:44,540 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:44,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:44,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1627186836, now seen corresponding path program 451 times [2021-06-05 21:29:44,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:44,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046781386] [2021-06-05 21:29:44,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:44,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:44,624 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:44,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:44,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046781386] [2021-06-05 21:29:44,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046781386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:44,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471969535] [2021-06-05 21:29:44,625 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:44,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:44,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:29:44,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:44,694 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:44,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471969535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:44,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:44,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-05 21:29:44,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99868602] [2021-06-05 21:29:44,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:29:44,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:44,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:29:44,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:29:44,695 INFO L87 Difference]: Start difference. First operand 185975 states and 564688 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:45,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:45,505 INFO L93 Difference]: Finished difference Result 189635 states and 574166 transitions. [2021-06-05 21:29:45,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:29:45,505 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:29:45,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:46,613 INFO L225 Difference]: With dead ends: 189635 [2021-06-05 21:29:46,613 INFO L226 Difference]: Without dead ends: 189635 [2021-06-05 21:29:46,613 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 156.8ms TimeCoverageRelationStatistics Valid=295, Invalid=575, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:29:46,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189635 states. [2021-06-05 21:29:49,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189635 to 184848. [2021-06-05 21:29:50,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184848 states, 184847 states have (on average 3.036094716170671) internal successors, (561213), 184847 states have internal predecessors, (561213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:50,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184848 states to 184848 states and 561213 transitions. [2021-06-05 21:29:50,692 INFO L78 Accepts]: Start accepts. Automaton has 184848 states and 561213 transitions. Word has length 25 [2021-06-05 21:29:50,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:29:50,692 INFO L482 AbstractCegarLoop]: Abstraction has 184848 states and 561213 transitions. [2021-06-05 21:29:50,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:50,692 INFO L276 IsEmpty]: Start isEmpty. Operand 184848 states and 561213 transitions. [2021-06-05 21:29:50,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:29:50,788 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:29:50,788 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:29:50,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20253,453 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:50,989 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:29:50,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:29:50,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1400323282, now seen corresponding path program 452 times [2021-06-05 21:29:50,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:29:50,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499052914] [2021-06-05 21:29:50,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:29:50,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:29:51,078 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:51,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:29:51,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499052914] [2021-06-05 21:29:51,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499052914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:51,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054921852] [2021-06-05 21:29:51,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:29:51,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:29:51,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:29:51,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:29:51,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:29:51,148 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:29:51,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054921852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:29:51,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:29:51,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-05 21:29:51,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236070801] [2021-06-05 21:29:51,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:29:51,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:29:51,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:29:51,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:29:51,149 INFO L87 Difference]: Start difference. First operand 184848 states and 561213 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:29:53,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:29:53,077 INFO L93 Difference]: Finished difference Result 276211 states and 836546 transitions. [2021-06-05 21:29:53,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:29:53,077 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:29:53,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:29:53,750 INFO L225 Difference]: With dead ends: 276211 [2021-06-05 21:29:53,750 INFO L226 Difference]: Without dead ends: 276211 [2021-06-05 21:29:53,750 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 245.7ms TimeCoverageRelationStatistics Valid=535, Invalid=1025, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 21:29:53,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276211 states. [2021-06-05 21:29:58,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276211 to 269074. [2021-06-05 21:29:58,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269074 states, 269073 states have (on average 3.036577434376545) internal successors, (817061), 269073 states have internal predecessors, (817061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:00,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269074 states to 269074 states and 817061 transitions. [2021-06-05 21:30:00,613 INFO L78 Accepts]: Start accepts. Automaton has 269074 states and 817061 transitions. Word has length 25 [2021-06-05 21:30:00,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:00,613 INFO L482 AbstractCegarLoop]: Abstraction has 269074 states and 817061 transitions. [2021-06-05 21:30:00,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:00,613 INFO L276 IsEmpty]: Start isEmpty. Operand 269074 states and 817061 transitions. [2021-06-05 21:30:00,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:30:00,720 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:00,720 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:00,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20254 [2021-06-05 21:30:00,921 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:00,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:00,921 INFO L82 PathProgramCache]: Analyzing trace with hash -239563868, now seen corresponding path program 453 times [2021-06-05 21:30:00,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:00,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830681467] [2021-06-05 21:30:00,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:00,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:01,004 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:01,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:01,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830681467] [2021-06-05 21:30:01,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830681467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:01,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024968044] [2021-06-05 21:30:01,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:01,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 21:30:01,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:01,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:30:01,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:01,078 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:01,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024968044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:01,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:01,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-05 21:30:01,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819462872] [2021-06-05 21:30:01,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:30:01,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:01,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:30:01,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:30:01,079 INFO L87 Difference]: Start difference. First operand 269074 states and 817061 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:03,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:03,140 INFO L93 Difference]: Finished difference Result 315035 states and 954004 transitions. [2021-06-05 21:30:03,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:30:03,140 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:30:03,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:03,883 INFO L225 Difference]: With dead ends: 315035 [2021-06-05 21:30:03,884 INFO L226 Difference]: Without dead ends: 315035 [2021-06-05 21:30:03,884 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 181.5ms TimeCoverageRelationStatistics Valid=369, Invalid=687, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:30:04,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315035 states. [2021-06-05 21:30:08,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315035 to 143842. [2021-06-05 21:30:08,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143842 states, 143841 states have (on average 3.0134732100027115) internal successors, (433461), 143841 states have internal predecessors, (433461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:09,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143842 states to 143842 states and 433461 transitions. [2021-06-05 21:30:09,339 INFO L78 Accepts]: Start accepts. Automaton has 143842 states and 433461 transitions. Word has length 25 [2021-06-05 21:30:09,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:09,339 INFO L482 AbstractCegarLoop]: Abstraction has 143842 states and 433461 transitions. [2021-06-05 21:30:09,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:09,339 INFO L276 IsEmpty]: Start isEmpty. Operand 143842 states and 433461 transitions. [2021-06-05 21:30:09,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:30:09,417 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:09,417 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:09,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20255 [2021-06-05 21:30:09,618 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:09,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:09,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1904292324, now seen corresponding path program 454 times [2021-06-05 21:30:09,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:09,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86865546] [2021-06-05 21:30:09,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:09,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:09,683 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 33 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:30:09,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:09,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86865546] [2021-06-05 21:30:09,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86865546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:09,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837040673] [2021-06-05 21:30:09,683 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:09,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:30:09,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:09,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:30:09,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:09,752 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 38 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:30:09,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837040673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:09,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:09,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 21:30:09,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763066774] [2021-06-05 21:30:09,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:30:09,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:09,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:30:09,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:30:09,753 INFO L87 Difference]: Start difference. First operand 143842 states and 433461 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:10,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:10,480 INFO L93 Difference]: Finished difference Result 173347 states and 520424 transitions. [2021-06-05 21:30:10,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:30:10,481 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:30:10,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:10,865 INFO L225 Difference]: With dead ends: 173347 [2021-06-05 21:30:10,865 INFO L226 Difference]: Without dead ends: 173347 [2021-06-05 21:30:10,865 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 113.3ms TimeCoverageRelationStatistics Valid=223, Invalid=377, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:30:10,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173347 states. [2021-06-05 21:30:14,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173347 to 144026. [2021-06-05 21:30:14,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144026 states, 144025 states have (on average 3.0132685297691375) internal successors, (433986), 144025 states have internal predecessors, (433986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:14,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144026 states to 144026 states and 433986 transitions. [2021-06-05 21:30:14,878 INFO L78 Accepts]: Start accepts. Automaton has 144026 states and 433986 transitions. Word has length 25 [2021-06-05 21:30:14,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:14,878 INFO L482 AbstractCegarLoop]: Abstraction has 144026 states and 433986 transitions. [2021-06-05 21:30:14,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:14,878 INFO L276 IsEmpty]: Start isEmpty. Operand 144026 states and 433986 transitions. [2021-06-05 21:30:14,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:30:14,963 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:14,963 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:15,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 456 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20256 [2021-06-05 21:30:15,163 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:15,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:15,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1852819394, now seen corresponding path program 455 times [2021-06-05 21:30:15,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:15,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587681814] [2021-06-05 21:30:15,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:15,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:15,236 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:15,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:15,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587681814] [2021-06-05 21:30:15,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587681814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:15,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219933990] [2021-06-05 21:30:15,237 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:15,263 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:30:15,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:15,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:30:15,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:15,308 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 35 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:15,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219933990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:15,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:15,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 21:30:15,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965289063] [2021-06-05 21:30:15,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:30:15,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:15,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:30:15,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:30:15,309 INFO L87 Difference]: Start difference. First operand 144026 states and 433986 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:16,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:16,559 INFO L93 Difference]: Finished difference Result 165051 states and 495636 transitions. [2021-06-05 21:30:16,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:30:16,560 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:30:16,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:16,928 INFO L225 Difference]: With dead ends: 165051 [2021-06-05 21:30:16,928 INFO L226 Difference]: Without dead ends: 165051 [2021-06-05 21:30:16,928 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 116.4ms TimeCoverageRelationStatistics Valid=214, Invalid=386, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:30:17,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165051 states. [2021-06-05 21:30:19,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165051 to 98547. [2021-06-05 21:30:19,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98547 states, 98546 states have (on average 3.001745377793112) internal successors, (295810), 98546 states have internal predecessors, (295810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:20,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98547 states to 98547 states and 295810 transitions. [2021-06-05 21:30:20,054 INFO L78 Accepts]: Start accepts. Automaton has 98547 states and 295810 transitions. Word has length 25 [2021-06-05 21:30:20,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:20,054 INFO L482 AbstractCegarLoop]: Abstraction has 98547 states and 295810 transitions. [2021-06-05 21:30:20,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:20,054 INFO L276 IsEmpty]: Start isEmpty. Operand 98547 states and 295810 transitions. [2021-06-05 21:30:20,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:30:20,112 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:20,112 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:20,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20257 [2021-06-05 21:30:20,312 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:20,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:20,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1935801636, now seen corresponding path program 456 times [2021-06-05 21:30:20,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:20,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869582183] [2021-06-05 21:30:20,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:20,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:20,389 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:30:20,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:20,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869582183] [2021-06-05 21:30:20,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869582183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:20,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767567232] [2021-06-05 21:30:20,389 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:20,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:30:20,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:20,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:30:20,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:20,470 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:30:20,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767567232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:20,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:20,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 21:30:20,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205384854] [2021-06-05 21:30:20,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:30:20,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:20,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:30:20,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:30:20,470 INFO L87 Difference]: Start difference. First operand 98547 states and 295810 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:21,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:21,570 INFO L93 Difference]: Finished difference Result 159493 states and 478171 transitions. [2021-06-05 21:30:21,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:30:21,571 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:30:21,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:21,929 INFO L225 Difference]: With dead ends: 159493 [2021-06-05 21:30:21,930 INFO L226 Difference]: Without dead ends: 159493 [2021-06-05 21:30:21,930 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 107.5ms TimeCoverageRelationStatistics Valid=165, Invalid=341, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:30:22,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159493 states. [2021-06-05 21:30:24,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159493 to 140825. [2021-06-05 21:30:24,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140825 states, 140824 states have (on average 3.008095211043572) internal successors, (423612), 140824 states have internal predecessors, (423612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:24,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140825 states to 140825 states and 423612 transitions. [2021-06-05 21:30:24,904 INFO L78 Accepts]: Start accepts. Automaton has 140825 states and 423612 transitions. Word has length 25 [2021-06-05 21:30:24,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:24,905 INFO L482 AbstractCegarLoop]: Abstraction has 140825 states and 423612 transitions. [2021-06-05 21:30:24,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:24,905 INFO L276 IsEmpty]: Start isEmpty. Operand 140825 states and 423612 transitions. [2021-06-05 21:30:24,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:30:24,989 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:24,989 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:25,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 458 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20258 [2021-06-05 21:30:25,189 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:25,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:25,190 INFO L82 PathProgramCache]: Analyzing trace with hash -876030722, now seen corresponding path program 457 times [2021-06-05 21:30:25,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:25,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788379684] [2021-06-05 21:30:25,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:25,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:25,275 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:25,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:25,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788379684] [2021-06-05 21:30:25,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788379684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:25,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504616201] [2021-06-05 21:30:25,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:25,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:25,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:30:25,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:25,344 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:25,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504616201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:25,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:25,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-05 21:30:25,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817692497] [2021-06-05 21:30:25,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:30:25,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:25,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:30:25,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:30:25,346 INFO L87 Difference]: Start difference. First operand 140825 states and 423612 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:26,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:26,595 INFO L93 Difference]: Finished difference Result 166578 states and 499146 transitions. [2021-06-05 21:30:26,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 21:30:26,595 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:30:26,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:26,998 INFO L225 Difference]: With dead ends: 166578 [2021-06-05 21:30:26,998 INFO L226 Difference]: Without dead ends: 166578 [2021-06-05 21:30:26,999 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 157.7ms TimeCoverageRelationStatistics Valid=294, Invalid=576, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:30:27,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166578 states. [2021-06-05 21:30:29,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166578 to 88690. [2021-06-05 21:30:29,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88690 states, 88689 states have (on average 2.996685045496059) internal successors, (265773), 88689 states have internal predecessors, (265773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:29,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88690 states to 88690 states and 265773 transitions. [2021-06-05 21:30:29,733 INFO L78 Accepts]: Start accepts. Automaton has 88690 states and 265773 transitions. Word has length 25 [2021-06-05 21:30:29,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:29,733 INFO L482 AbstractCegarLoop]: Abstraction has 88690 states and 265773 transitions. [2021-06-05 21:30:29,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:29,733 INFO L276 IsEmpty]: Start isEmpty. Operand 88690 states and 265773 transitions. [2021-06-05 21:30:29,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:30:29,793 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:29,793 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:29,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20259,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:29,993 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:29,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:29,993 INFO L82 PathProgramCache]: Analyzing trace with hash -2143487900, now seen corresponding path program 458 times [2021-06-05 21:30:29,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:29,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675332853] [2021-06-05 21:30:29,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:29,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:30,083 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 23 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:30,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:30,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675332853] [2021-06-05 21:30:30,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675332853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:30,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068475722] [2021-06-05 21:30:30,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:30,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:30:30,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:30,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:30:30,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:30,153 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:30,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068475722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:30,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:30,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-05 21:30:30,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124686950] [2021-06-05 21:30:30,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:30:30,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:30,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:30:30,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:30:30,154 INFO L87 Difference]: Start difference. First operand 88690 states and 265773 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:30,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:30,857 INFO L93 Difference]: Finished difference Result 132265 states and 395319 transitions. [2021-06-05 21:30:30,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:30:30,857 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:30:30,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:31,132 INFO L225 Difference]: With dead ends: 132265 [2021-06-05 21:30:31,133 INFO L226 Difference]: Without dead ends: 132265 [2021-06-05 21:30:31,133 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 246.9ms TimeCoverageRelationStatistics Valid=534, Invalid=1026, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 21:30:31,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132265 states. [2021-06-05 21:30:33,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132265 to 75005. [2021-06-05 21:30:33,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75005 states, 75004 states have (on average 3.0035331448989386) internal successors, (225277), 75004 states have internal predecessors, (225277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:33,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75005 states to 75005 states and 225277 transitions. [2021-06-05 21:30:33,514 INFO L78 Accepts]: Start accepts. Automaton has 75005 states and 225277 transitions. Word has length 25 [2021-06-05 21:30:33,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:33,514 INFO L482 AbstractCegarLoop]: Abstraction has 75005 states and 225277 transitions. [2021-06-05 21:30:33,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:33,514 INFO L276 IsEmpty]: Start isEmpty. Operand 75005 states and 225277 transitions. [2021-06-05 21:30:33,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:30:33,561 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:33,561 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:33,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20260,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:33,761 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:33,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:33,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1062601334, now seen corresponding path program 459 times [2021-06-05 21:30:33,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:33,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653536740] [2021-06-05 21:30:33,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:33,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:33,839 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:30:33,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:33,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653536740] [2021-06-05 21:30:33,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653536740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:33,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193625741] [2021-06-05 21:30:33,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:33,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:30:33,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:33,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:30:33,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:33,919 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:30:33,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193625741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:33,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:33,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 21:30:33,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882869188] [2021-06-05 21:30:33,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:30:33,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:33,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:30:33,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:30:33,920 INFO L87 Difference]: Start difference. First operand 75005 states and 225277 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:34,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:34,282 INFO L93 Difference]: Finished difference Result 75445 states and 225722 transitions. [2021-06-05 21:30:34,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:30:34,283 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:30:34,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:34,808 INFO L225 Difference]: With dead ends: 75445 [2021-06-05 21:30:34,808 INFO L226 Difference]: Without dead ends: 75443 [2021-06-05 21:30:34,808 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 108.3ms TimeCoverageRelationStatistics Valid=167, Invalid=339, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:30:34,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75443 states. [2021-06-05 21:30:36,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75443 to 74587. [2021-06-05 21:30:36,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74587 states, 74586 states have (on average 3.0023462848255704) internal successors, (223933), 74586 states have internal predecessors, (223933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:36,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74587 states to 74587 states and 223933 transitions. [2021-06-05 21:30:36,336 INFO L78 Accepts]: Start accepts. Automaton has 74587 states and 223933 transitions. Word has length 25 [2021-06-05 21:30:36,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:36,336 INFO L482 AbstractCegarLoop]: Abstraction has 74587 states and 223933 transitions. [2021-06-05 21:30:36,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:36,336 INFO L276 IsEmpty]: Start isEmpty. Operand 74587 states and 223933 transitions. [2021-06-05 21:30:36,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:30:36,385 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:36,385 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:36,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20261 [2021-06-05 21:30:36,585 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:36,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:36,585 INFO L82 PathProgramCache]: Analyzing trace with hash 420533604, now seen corresponding path program 460 times [2021-06-05 21:30:36,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:36,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023413483] [2021-06-05 21:30:36,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:36,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:36,670 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:36,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:36,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023413483] [2021-06-05 21:30:36,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023413483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:36,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120468772] [2021-06-05 21:30:36,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:36,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:30:36,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:36,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:30:36,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:36,746 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:36,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120468772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:36,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:36,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-05 21:30:36,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873503658] [2021-06-05 21:30:36,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:30:36,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:36,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:30:36,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:30:36,747 INFO L87 Difference]: Start difference. First operand 74587 states and 223933 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:37,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:37,178 INFO L93 Difference]: Finished difference Result 83574 states and 249816 transitions. [2021-06-05 21:30:37,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:30:37,178 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:30:37,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:37,346 INFO L225 Difference]: With dead ends: 83574 [2021-06-05 21:30:37,347 INFO L226 Difference]: Without dead ends: 83574 [2021-06-05 21:30:37,347 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 157.6ms TimeCoverageRelationStatistics Valid=297, Invalid=573, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:30:37,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83574 states. [2021-06-05 21:30:38,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83574 to 52866. [2021-06-05 21:30:38,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52866 states, 52865 states have (on average 2.989047574009269) internal successors, (158016), 52865 states have internal predecessors, (158016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:39,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52866 states to 52866 states and 158016 transitions. [2021-06-05 21:30:39,188 INFO L78 Accepts]: Start accepts. Automaton has 52866 states and 158016 transitions. Word has length 25 [2021-06-05 21:30:39,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:39,188 INFO L482 AbstractCegarLoop]: Abstraction has 52866 states and 158016 transitions. [2021-06-05 21:30:39,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:39,188 INFO L276 IsEmpty]: Start isEmpty. Operand 52866 states and 158016 transitions. [2021-06-05 21:30:39,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:30:39,226 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:39,226 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:39,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 462 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20262 [2021-06-05 21:30:39,427 INFO L430 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:39,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:39,427 INFO L82 PathProgramCache]: Analyzing trace with hash -846923574, now seen corresponding path program 461 times [2021-06-05 21:30:39,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:39,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435596487] [2021-06-05 21:30:39,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:39,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:39,516 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 23 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:39,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:39,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435596487] [2021-06-05 21:30:39,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435596487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:39,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607517196] [2021-06-05 21:30:39,516 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:39,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:30:39,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:39,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:30:39,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:39,596 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:39,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607517196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:39,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:39,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-05 21:30:39,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522662459] [2021-06-05 21:30:39,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:30:39,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:39,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:30:39,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:30:39,597 INFO L87 Difference]: Start difference. First operand 52866 states and 158016 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:40,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:40,118 INFO L93 Difference]: Finished difference Result 78034 states and 231687 transitions. [2021-06-05 21:30:40,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 21:30:40,119 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:30:40,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:40,296 INFO L225 Difference]: With dead ends: 78034 [2021-06-05 21:30:40,296 INFO L226 Difference]: Without dead ends: 78034 [2021-06-05 21:30:40,296 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 244.4ms TimeCoverageRelationStatistics Valid=541, Invalid=1019, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 21:30:40,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78034 states. [2021-06-05 21:30:41,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78034 to 41286. [2021-06-05 21:30:41,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41286 states, 41285 states have (on average 2.9907714666343708) internal successors, (123474), 41285 states have internal predecessors, (123474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:41,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41286 states to 41286 states and 123474 transitions. [2021-06-05 21:30:41,478 INFO L78 Accepts]: Start accepts. Automaton has 41286 states and 123474 transitions. Word has length 25 [2021-06-05 21:30:41,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:41,478 INFO L482 AbstractCegarLoop]: Abstraction has 41286 states and 123474 transitions. [2021-06-05 21:30:41,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:41,478 INFO L276 IsEmpty]: Start isEmpty. Operand 41286 states and 123474 transitions. [2021-06-05 21:30:41,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:30:41,515 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:41,515 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:41,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20263,463 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:41,715 INFO L430 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:41,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:41,716 INFO L82 PathProgramCache]: Analyzing trace with hash -41716956, now seen corresponding path program 462 times [2021-06-05 21:30:41,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:41,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845169142] [2021-06-05 21:30:41,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:41,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:41,768 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:30:41,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:41,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845169142] [2021-06-05 21:30:41,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845169142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:41,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085991635] [2021-06-05 21:30:41,768 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:41,795 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:30:41,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:41,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:30:41,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:41,834 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:30:41,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085991635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:41,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:41,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 21:30:41,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601253560] [2021-06-05 21:30:41,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:30:41,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:41,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:30:41,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:30:41,835 INFO L87 Difference]: Start difference. First operand 41286 states and 123474 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:42,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:42,102 INFO L93 Difference]: Finished difference Result 41661 states and 123915 transitions. [2021-06-05 21:30:42,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:30:42,102 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:30:42,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:42,162 INFO L225 Difference]: With dead ends: 41661 [2021-06-05 21:30:42,162 INFO L226 Difference]: Without dead ends: 41657 [2021-06-05 21:30:42,162 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 115.0ms TimeCoverageRelationStatistics Valid=210, Invalid=390, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:30:42,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41657 states. [2021-06-05 21:30:42,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41657 to 41286. [2021-06-05 21:30:42,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41286 states, 41285 states have (on average 2.9906503572726173) internal successors, (123469), 41285 states have internal predecessors, (123469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:42,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41286 states to 41286 states and 123469 transitions. [2021-06-05 21:30:42,959 INFO L78 Accepts]: Start accepts. Automaton has 41286 states and 123469 transitions. Word has length 25 [2021-06-05 21:30:42,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:42,960 INFO L482 AbstractCegarLoop]: Abstraction has 41286 states and 123469 transitions. [2021-06-05 21:30:42,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:42,960 INFO L276 IsEmpty]: Start isEmpty. Operand 41286 states and 123469 transitions. [2021-06-05 21:30:42,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:30:42,996 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:42,996 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:43,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20264 [2021-06-05 21:30:43,196 INFO L430 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:43,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:43,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1688753060, now seen corresponding path program 463 times [2021-06-05 21:30:43,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:43,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267165162] [2021-06-05 21:30:43,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:43,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:43,285 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 23 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:43,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:43,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267165162] [2021-06-05 21:30:43,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267165162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:43,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837468330] [2021-06-05 21:30:43,285 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:43,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:43,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:30:43,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:43,361 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:43,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837468330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:43,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:43,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-05 21:30:43,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40027966] [2021-06-05 21:30:43,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:30:43,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:43,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:30:43,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:30:43,362 INFO L87 Difference]: Start difference. First operand 41286 states and 123469 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:43,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:43,796 INFO L93 Difference]: Finished difference Result 67989 states and 201876 transitions. [2021-06-05 21:30:43,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:30:43,796 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:30:43,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:43,911 INFO L225 Difference]: With dead ends: 67989 [2021-06-05 21:30:43,911 INFO L226 Difference]: Without dead ends: 67989 [2021-06-05 21:30:43,911 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 218.3ms TimeCoverageRelationStatistics Valid=460, Invalid=872, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 21:30:43,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67989 states. [2021-06-05 21:30:44,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67989 to 60015. [2021-06-05 21:30:45,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60015 states, 60014 states have (on average 2.994384643583164) internal successors, (179705), 60014 states have internal predecessors, (179705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:45,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60015 states to 60015 states and 179705 transitions. [2021-06-05 21:30:45,466 INFO L78 Accepts]: Start accepts. Automaton has 60015 states and 179705 transitions. Word has length 25 [2021-06-05 21:30:45,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:45,466 INFO L482 AbstractCegarLoop]: Abstraction has 60015 states and 179705 transitions. [2021-06-05 21:30:45,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:45,466 INFO L276 IsEmpty]: Start isEmpty. Operand 60015 states and 179705 transitions. [2021-06-05 21:30:45,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:30:45,511 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:45,511 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:45,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20265,465 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:45,711 INFO L430 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:45,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:45,712 INFO L82 PathProgramCache]: Analyzing trace with hash 963120774, now seen corresponding path program 464 times [2021-06-05 21:30:45,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:45,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919385214] [2021-06-05 21:30:45,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:45,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:45,769 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 32 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:45,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:45,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919385214] [2021-06-05 21:30:45,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919385214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:45,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666273004] [2021-06-05 21:30:45,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:45,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:30:45,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:45,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:30:45,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:45,833 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 39 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:30:45,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666273004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:45,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:45,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:30:45,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024813002] [2021-06-05 21:30:45,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:30:45,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:45,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:30:45,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:30:45,834 INFO L87 Difference]: Start difference. First operand 60015 states and 179705 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:46,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:46,185 INFO L93 Difference]: Finished difference Result 60480 states and 180320 transitions. [2021-06-05 21:30:46,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:30:46,185 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:30:46,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:46,299 INFO L225 Difference]: With dead ends: 60480 [2021-06-05 21:30:46,299 INFO L226 Difference]: Without dead ends: 60476 [2021-06-05 21:30:46,299 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 115.5ms TimeCoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:30:46,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60476 states. [2021-06-05 21:30:47,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60476 to 60031. [2021-06-05 21:30:47,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60031 states, 60030 states have (on average 2.9940029985007497) internal successors, (179730), 60030 states have internal predecessors, (179730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:47,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60031 states to 60031 states and 179730 transitions. [2021-06-05 21:30:47,537 INFO L78 Accepts]: Start accepts. Automaton has 60031 states and 179730 transitions. Word has length 25 [2021-06-05 21:30:47,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:47,537 INFO L482 AbstractCegarLoop]: Abstraction has 60031 states and 179730 transitions. [2021-06-05 21:30:47,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:47,537 INFO L276 IsEmpty]: Start isEmpty. Operand 60031 states and 179730 transitions. [2021-06-05 21:30:47,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:30:47,581 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:47,581 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:47,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 466 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20266 [2021-06-05 21:30:47,781 INFO L430 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:47,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:47,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1614097462, now seen corresponding path program 465 times [2021-06-05 21:30:47,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:47,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678024464] [2021-06-05 21:30:47,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:47,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:47,841 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 32 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:47,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:47,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678024464] [2021-06-05 21:30:47,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678024464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:47,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035403593] [2021-06-05 21:30:47,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:47,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:30:47,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:47,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:30:47,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:47,913 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 39 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:47,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035403593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:47,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:47,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 21:30:47,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238174684] [2021-06-05 21:30:47,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:30:47,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:47,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:30:47,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:30:47,915 INFO L87 Difference]: Start difference. First operand 60031 states and 179730 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:48,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:48,205 INFO L93 Difference]: Finished difference Result 65631 states and 195205 transitions. [2021-06-05 21:30:48,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:30:48,205 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:30:48,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:48,327 INFO L225 Difference]: With dead ends: 65631 [2021-06-05 21:30:48,327 INFO L226 Difference]: Without dead ends: 65631 [2021-06-05 21:30:48,327 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 85.1ms TimeCoverageRelationStatistics Valid=170, Invalid=250, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:30:48,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65631 states. [2021-06-05 21:30:49,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65631 to 60041. [2021-06-05 21:30:49,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60041 states, 60040 states have (on average 2.9939373750832776) internal successors, (179756), 60040 states have internal predecessors, (179756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:49,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60041 states to 60041 states and 179756 transitions. [2021-06-05 21:30:49,961 INFO L78 Accepts]: Start accepts. Automaton has 60041 states and 179756 transitions. Word has length 25 [2021-06-05 21:30:49,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:49,962 INFO L482 AbstractCegarLoop]: Abstraction has 60041 states and 179756 transitions. [2021-06-05 21:30:49,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:49,962 INFO L276 IsEmpty]: Start isEmpty. Operand 60041 states and 179756 transitions. [2021-06-05 21:30:50,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:30:50,001 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:50,001 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:50,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20267,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:50,202 INFO L430 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:50,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:50,202 INFO L82 PathProgramCache]: Analyzing trace with hash 951822500, now seen corresponding path program 466 times [2021-06-05 21:30:50,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:50,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798633211] [2021-06-05 21:30:50,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:50,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:50,263 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:30:50,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:50,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798633211] [2021-06-05 21:30:50,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798633211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:50,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128430331] [2021-06-05 21:30:50,263 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:50,287 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:30:50,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:50,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:30:50,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:50,337 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 36 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:30:50,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128430331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:50,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:50,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 21:30:50,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465042239] [2021-06-05 21:30:50,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:30:50,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:50,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:30:50,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:30:50,337 INFO L87 Difference]: Start difference. First operand 60041 states and 179756 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:50,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:50,678 INFO L93 Difference]: Finished difference Result 70196 states and 208624 transitions. [2021-06-05 21:30:50,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:30:50,679 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:30:50,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:50,806 INFO L225 Difference]: With dead ends: 70196 [2021-06-05 21:30:50,807 INFO L226 Difference]: Without dead ends: 70196 [2021-06-05 21:30:50,807 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 116.7ms TimeCoverageRelationStatistics Valid=248, Invalid=402, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:30:50,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70196 states. [2021-06-05 21:30:52,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70196 to 60079. [2021-06-05 21:30:52,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60079 states, 60078 states have (on average 2.9939412097606444) internal successors, (179870), 60078 states have internal predecessors, (179870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:52,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60079 states to 60079 states and 179870 transitions. [2021-06-05 21:30:52,324 INFO L78 Accepts]: Start accepts. Automaton has 60079 states and 179870 transitions. Word has length 25 [2021-06-05 21:30:52,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:52,325 INFO L482 AbstractCegarLoop]: Abstraction has 60079 states and 179870 transitions. [2021-06-05 21:30:52,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:52,325 INFO L276 IsEmpty]: Start isEmpty. Operand 60079 states and 179870 transitions. [2021-06-05 21:30:52,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:30:52,365 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:52,366 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:52,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 468 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20268 [2021-06-05 21:30:52,566 INFO L430 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:52,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:52,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1109037302, now seen corresponding path program 467 times [2021-06-05 21:30:52,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:52,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121267143] [2021-06-05 21:30:52,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:52,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:52,633 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 29 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:52,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:52,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121267143] [2021-06-05 21:30:52,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121267143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:52,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308859839] [2021-06-05 21:30:52,633 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:52,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:30:52,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:52,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:30:52,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:52,710 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 34 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:52,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308859839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:52,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:52,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:30:52,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509175570] [2021-06-05 21:30:52,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:30:52,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:52,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:30:52,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:30:52,711 INFO L87 Difference]: Start difference. First operand 60079 states and 179870 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:53,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:53,069 INFO L93 Difference]: Finished difference Result 72590 states and 215734 transitions. [2021-06-05 21:30:53,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:30:53,070 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:30:53,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:53,510 INFO L225 Difference]: With dead ends: 72590 [2021-06-05 21:30:53,510 INFO L226 Difference]: Without dead ends: 72590 [2021-06-05 21:30:53,510 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 138.3ms TimeCoverageRelationStatistics Valid=302, Invalid=510, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:30:53,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72590 states. [2021-06-05 21:30:54,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72590 to 59829. [2021-06-05 21:30:54,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59829 states, 59828 states have (on average 2.9930968777161198) internal successors, (179071), 59828 states have internal predecessors, (179071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:54,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59829 states to 59829 states and 179071 transitions. [2021-06-05 21:30:54,742 INFO L78 Accepts]: Start accepts. Automaton has 59829 states and 179071 transitions. Word has length 25 [2021-06-05 21:30:54,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:54,742 INFO L482 AbstractCegarLoop]: Abstraction has 59829 states and 179071 transitions. [2021-06-05 21:30:54,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:54,742 INFO L276 IsEmpty]: Start isEmpty. Operand 59829 states and 179071 transitions. [2021-06-05 21:30:54,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:30:54,787 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:54,787 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:54,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20269,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:54,987 INFO L430 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:54,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:54,988 INFO L82 PathProgramCache]: Analyzing trace with hash -571181724, now seen corresponding path program 468 times [2021-06-05 21:30:54,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:54,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946910193] [2021-06-05 21:30:54,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:54,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:55,056 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 27 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:30:55,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:55,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946910193] [2021-06-05 21:30:55,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946910193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:55,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419058943] [2021-06-05 21:30:55,056 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:55,083 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 21:30:55,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:30:55,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:30:55,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:55,131 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:30:55,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419058943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:55,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:55,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 21:30:55,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178085121] [2021-06-05 21:30:55,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 21:30:55,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:55,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 21:30:55,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:30:55,132 INFO L87 Difference]: Start difference. First operand 59829 states and 179071 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:55,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:55,554 INFO L93 Difference]: Finished difference Result 93593 states and 280293 transitions. [2021-06-05 21:30:55,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 21:30:55,554 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:30:55,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:55,730 INFO L225 Difference]: With dead ends: 93593 [2021-06-05 21:30:55,731 INFO L226 Difference]: Without dead ends: 93593 [2021-06-05 21:30:55,731 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 145.6ms TimeCoverageRelationStatistics Valid=293, Invalid=519, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:30:55,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93593 states. [2021-06-05 21:30:57,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93593 to 82993. [2021-06-05 21:30:57,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82993 states, 82992 states have (on average 3.016278677462888) internal successors, (250327), 82992 states have internal predecessors, (250327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:57,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82993 states to 82993 states and 250327 transitions. [2021-06-05 21:30:57,784 INFO L78 Accepts]: Start accepts. Automaton has 82993 states and 250327 transitions. Word has length 25 [2021-06-05 21:30:57,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:30:57,784 INFO L482 AbstractCegarLoop]: Abstraction has 82993 states and 250327 transitions. [2021-06-05 21:30:57,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:57,784 INFO L276 IsEmpty]: Start isEmpty. Operand 82993 states and 250327 transitions. [2021-06-05 21:30:57,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:30:57,834 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:30:57,834 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:30:58,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20270,470 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:58,035 INFO L430 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:30:58,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:30:58,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1077527990, now seen corresponding path program 469 times [2021-06-05 21:30:58,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:30:58,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765042221] [2021-06-05 21:30:58,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:30:58,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:58,110 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:58,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:30:58,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765042221] [2021-06-05 21:30:58,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765042221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:58,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728556518] [2021-06-05 21:30:58,111 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:30:58,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:30:58,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:30:58,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:30:58,185 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 29 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:30:58,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728556518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:30:58,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:30:58,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 21:30:58,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680531721] [2021-06-05 21:30:58,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:30:58,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:30:58,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:30:58,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:30:58,186 INFO L87 Difference]: Start difference. First operand 82993 states and 250327 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:30:58,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:30:58,613 INFO L93 Difference]: Finished difference Result 90382 states and 270822 transitions. [2021-06-05 21:30:58,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:30:58,614 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:30:58,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:30:58,777 INFO L225 Difference]: With dead ends: 90382 [2021-06-05 21:30:58,777 INFO L226 Difference]: Without dead ends: 90382 [2021-06-05 21:30:58,777 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 139.3ms TimeCoverageRelationStatistics Valid=262, Invalid=494, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:30:58,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90382 states. [2021-06-05 21:31:00,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90382 to 81151. [2021-06-05 21:31:00,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81151 states, 81150 states have (on average 3.0145532963647566) internal successors, (244631), 81150 states have internal predecessors, (244631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:00,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81151 states to 81151 states and 244631 transitions. [2021-06-05 21:31:00,472 INFO L78 Accepts]: Start accepts. Automaton has 81151 states and 244631 transitions. Word has length 25 [2021-06-05 21:31:00,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:31:00,472 INFO L482 AbstractCegarLoop]: Abstraction has 81151 states and 244631 transitions. [2021-06-05 21:31:00,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:00,472 INFO L276 IsEmpty]: Start isEmpty. Operand 81151 states and 244631 transitions. [2021-06-05 21:31:00,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:31:00,906 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:31:00,906 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:31:01,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20271 [2021-06-05 21:31:01,121 INFO L430 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:31:01,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:31:01,121 INFO L82 PathProgramCache]: Analyzing trace with hash 405606948, now seen corresponding path program 470 times [2021-06-05 21:31:01,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:31:01,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289840389] [2021-06-05 21:31:01,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:31:01,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:31:01,201 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:31:01,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:31:01,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289840389] [2021-06-05 21:31:01,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289840389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:01,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531481807] [2021-06-05 21:31:01,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:01,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:31:01,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:31:01,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:31:01,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:31:01,275 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:31:01,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531481807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:01,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:31:01,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 21:31:01,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046672617] [2021-06-05 21:31:01,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:31:01,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:31:01,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:31:01,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:31:01,276 INFO L87 Difference]: Start difference. First operand 81151 states and 244631 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:01,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:31:01,840 INFO L93 Difference]: Finished difference Result 141608 states and 426442 transitions. [2021-06-05 21:31:01,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:31:01,840 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:31:01,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:31:02,148 INFO L225 Difference]: With dead ends: 141608 [2021-06-05 21:31:02,148 INFO L226 Difference]: Without dead ends: 141608 [2021-06-05 21:31:02,149 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 131.2ms TimeCoverageRelationStatistics Valid=206, Invalid=444, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:31:02,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141608 states. [2021-06-05 21:31:04,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141608 to 133805. [2021-06-05 21:31:04,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133805 states, 133804 states have (on average 3.0223685390571284) internal successors, (404405), 133804 states have internal predecessors, (404405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:05,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133805 states to 133805 states and 404405 transitions. [2021-06-05 21:31:05,139 INFO L78 Accepts]: Start accepts. Automaton has 133805 states and 404405 transitions. Word has length 25 [2021-06-05 21:31:05,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:31:05,139 INFO L482 AbstractCegarLoop]: Abstraction has 133805 states and 404405 transitions. [2021-06-05 21:31:05,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:05,139 INFO L276 IsEmpty]: Start isEmpty. Operand 133805 states and 404405 transitions. [2021-06-05 21:31:05,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:31:05,208 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:31:05,208 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:31:05,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20272,472 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:05,408 INFO L430 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:31:05,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:31:05,409 INFO L82 PathProgramCache]: Analyzing trace with hash -861850230, now seen corresponding path program 471 times [2021-06-05 21:31:05,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:31:05,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669458470] [2021-06-05 21:31:05,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:31:05,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:31:05,985 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 23 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:05,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:31:05,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669458470] [2021-06-05 21:31:05,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669458470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:05,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426863205] [2021-06-05 21:31:05,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:06,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:31:06,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:31:06,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:31:06,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:31:06,144 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:06,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426863205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:06,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:31:06,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-05 21:31:06,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007783446] [2021-06-05 21:31:06,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:31:06,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:31:06,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:31:06,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:31:06,145 INFO L87 Difference]: Start difference. First operand 133805 states and 404405 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:06,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:31:06,842 INFO L93 Difference]: Finished difference Result 143196 states and 430987 transitions. [2021-06-05 21:31:06,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:31:06,843 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:31:06,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:31:07,175 INFO L225 Difference]: With dead ends: 143196 [2021-06-05 21:31:07,176 INFO L226 Difference]: Without dead ends: 143196 [2021-06-05 21:31:07,176 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 682.6ms TimeCoverageRelationStatistics Valid=373, Invalid=749, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:31:07,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143196 states. [2021-06-05 21:31:09,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143196 to 132675. [2021-06-05 21:31:10,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132675 states, 132674 states have (on average 3.022378160001206) internal successors, (400991), 132674 states have internal predecessors, (400991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:10,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132675 states to 132675 states and 400991 transitions. [2021-06-05 21:31:10,377 INFO L78 Accepts]: Start accepts. Automaton has 132675 states and 400991 transitions. Word has length 25 [2021-06-05 21:31:10,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:31:10,377 INFO L482 AbstractCegarLoop]: Abstraction has 132675 states and 400991 transitions. [2021-06-05 21:31:10,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:10,377 INFO L276 IsEmpty]: Start isEmpty. Operand 132675 states and 400991 transitions. [2021-06-05 21:31:10,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:31:10,455 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:31:10,455 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:31:10,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20273,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:10,655 INFO L430 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:31:10,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:31:10,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1498317084, now seen corresponding path program 472 times [2021-06-05 21:31:10,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:31:10,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329723493] [2021-06-05 21:31:10,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:31:10,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:31:10,751 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:10,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:31:10,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329723493] [2021-06-05 21:31:10,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329723493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:10,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158014172] [2021-06-05 21:31:10,751 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:10,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:31:10,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:31:10,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:31:10,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:31:11,252 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-06-05 21:31:11,284 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:11,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158014172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:11,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:31:11,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-05 21:31:11,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018976613] [2021-06-05 21:31:11,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:31:11,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:31:11,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:31:11,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:31:11,285 INFO L87 Difference]: Start difference. First operand 132675 states and 400991 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:12,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:31:12,311 INFO L93 Difference]: Finished difference Result 189263 states and 569984 transitions. [2021-06-05 21:31:12,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 21:31:12,311 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:31:12,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:31:12,761 INFO L225 Difference]: With dead ends: 189263 [2021-06-05 21:31:12,762 INFO L226 Difference]: Without dead ends: 189263 [2021-06-05 21:31:12,762 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 336.4ms TimeCoverageRelationStatistics Valid=705, Invalid=1365, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 21:31:12,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189263 states. [2021-06-05 21:31:16,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189263 to 176221. [2021-06-05 21:31:16,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176221 states, 176220 states have (on average 3.024032459425718) internal successors, (532895), 176220 states have internal predecessors, (532895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:17,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176221 states to 176221 states and 532895 transitions. [2021-06-05 21:31:17,025 INFO L78 Accepts]: Start accepts. Automaton has 176221 states and 532895 transitions. Word has length 25 [2021-06-05 21:31:17,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:31:17,025 INFO L482 AbstractCegarLoop]: Abstraction has 176221 states and 532895 transitions. [2021-06-05 21:31:17,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:17,025 INFO L276 IsEmpty]: Start isEmpty. Operand 176221 states and 532895 transitions. [2021-06-05 21:31:17,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:31:17,112 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:31:17,112 INFO L554 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:31:17,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 474 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20274 [2021-06-05 21:31:17,313 INFO L430 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:31:17,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:31:17,313 INFO L82 PathProgramCache]: Analyzing trace with hash -795211182, now seen corresponding path program 473 times [2021-06-05 21:31:17,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:31:17,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539453819] [2021-06-05 21:31:17,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:31:17,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:31:17,403 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:17,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:31:17,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539453819] [2021-06-05 21:31:17,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539453819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:17,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105350274] [2021-06-05 21:31:17,404 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:17,431 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 21:31:17,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:31:17,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 21:31:17,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:31:17,475 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:31:17,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105350274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:31:17,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:31:17,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-06-05 21:31:17,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172938779] [2021-06-05 21:31:17,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:31:17,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:31:17,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:31:17,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:31:17,476 INFO L87 Difference]: Start difference. First operand 176221 states and 532895 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:31:19,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:31:19,153 INFO L93 Difference]: Finished difference Result 207060 states and 624206 transitions. [2021-06-05 21:31:19,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:31:19,153 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:31:19,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:31:19,678 INFO L225 Difference]: With dead ends: 207060 [2021-06-05 21:31:19,678 INFO L226 Difference]: Without dead ends: 207060 [2021-06-05 21:31:19,678 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 275.3ms TimeCoverageRelationStatistics Valid=459, Invalid=873, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 21:31:19,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207060 states. Received shutdown request... [2021-06-05 21:31:21,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20275,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:31:21,317 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 21:31:21,318 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 21:31:21,319 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 21:31:21,320 INFO L202 PluginConnector]: Adding new model unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 09:31:21 BasicIcfg [2021-06-05 21:31:21,320 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 21:31:21,320 INFO L168 Benchmark]: Toolchain (without parser) took 855104.46 ms. Allocated memory was 367.0 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 346.6 MB in the beginning and 12.3 GB in the end (delta: -12.0 GB). Peak memory consumption was 4.1 GB. Max. memory is 16.0 GB. [2021-06-05 21:31:21,320 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 367.0 MB. Free memory was 347.8 MB in the beginning and 347.7 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 21:31:21,320 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.08 ms. Allocated memory is still 367.0 MB. Free memory was 346.6 MB in the beginning and 345.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 21:31:21,320 INFO L168 Benchmark]: Boogie Preprocessor took 14.03 ms. Allocated memory is still 367.0 MB. Free memory was 345.1 MB in the beginning and 344.2 MB in the end (delta: 961.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 21:31:21,320 INFO L168 Benchmark]: RCFGBuilder took 285.33 ms. Allocated memory is still 367.0 MB. Free memory was 344.1 MB in the beginning and 330.2 MB in the end (delta: 13.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-05 21:31:21,320 INFO L168 Benchmark]: TraceAbstraction took 854771.67 ms. Allocated memory was 367.0 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 329.7 MB in the beginning and 12.3 GB in the end (delta: -12.0 GB). Peak memory consumption was 4.0 GB. Max. memory is 16.0 GB. [2021-06-05 21:31:21,321 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 367.0 MB. Free memory was 347.8 MB in the beginning and 347.7 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 28.08 ms. Allocated memory is still 367.0 MB. Free memory was 346.6 MB in the beginning and 345.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.03 ms. Allocated memory is still 367.0 MB. Free memory was 345.1 MB in the beginning and 344.2 MB in the end (delta: 961.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 285.33 ms. Allocated memory is still 367.0 MB. Free memory was 344.1 MB in the beginning and 330.2 MB in the end (delta: 13.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 854771.67 ms. Allocated memory was 367.0 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 329.7 MB in the beginning and 12.3 GB in the end (delta: -12.0 GB). Peak memory consumption was 4.0 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 53]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 20 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 854640.3ms, OverallIterations: 477, TraceHistogramMax: 11, EmptinessCheckTime: 6698.8ms, AutomataDifference: 125106.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 16.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 9816 SDtfs, 41753 SDslu, 63671 SDs, 0 SdLazy, 73680 SolverSat, 13740 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 30769.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20372 GetRequests, 9680 SyntacticMatches, 225 SemanticMatches, 10467 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66697 ImplicationChecksByTransitivity, 65663.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=269074occurred in iteration=456, InterpolantAutomatonStates: 9359, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 165039.6ms AutomataMinimizationTime, 477 MinimizatonAttempts, 1167370 StatesRemovedByMinimization, 472 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1538.1ms SsaConstructionTime, 5425.9ms SatisfiabilityAnalysisTime, 445578.3ms InterpolantComputationTime, 19919 NumberOfCodeBlocks, 19913 NumberOfCodeBlocksAsserted, 2101 NumberOfCheckSat, 18968 ConstructedInterpolants, 0 QuantifiedInterpolants, 86588 SizeOfPredicates, 273 NumberOfNonLiveVariables, 40689 ConjunctsInSsa, 7109 ConjunctsInUnsatCore, 951 InterpolantComputations, 3 PerfectInterpolantSequences, 18421/46218 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown