/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-Separate.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-dev-29289db [2021-06-05 13:53:56,799 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 13:53:56,801 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 13:53:56,824 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 13:53:56,856 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-Separate.epf [2021-06-05 13:53:56,875 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 13:53:56,875 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 13:53:56,876 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 13:53:56,876 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 13:53:56,877 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 13:53:56,877 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 13:53:56,877 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 13:53:56,878 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 13:53:56,878 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 13:53:56,878 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 13:53:56,878 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 13:53:56,878 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 13:53:56,878 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 13:53:56,878 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 13:53:56,878 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 13:53:56,879 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 13:53:56,879 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 13:53:56,879 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 13:53:56,879 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 13:53:56,879 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 13:53:56,879 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 13:53:56,879 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 13:53:56,879 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 13:53:56,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 13:53:56,880 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 13:53:56,880 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 13:53:56,880 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 13:53:56,880 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 13:53:56,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 13:53:56,880 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 13:53:56,880 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 13:53:56,881 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 13:53:56,881 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 13:53:57,184 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 13:53:57,202 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 13:53:57,204 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 13:53:57,205 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 13:53:57,207 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 13:53:57,207 INFO L432 ainManager$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 13:53:57,208 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 13:53:57,250 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 13:53:57,251 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 13:53:57,257 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 13:53:57,258 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 13:53:57,258 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 13:53:57,272 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 01:53:57" (1/1) ... [2021-06-05 13:53:57,279 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 01:53:57" (1/1) ... [2021-06-05 13:53:57,286 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 13:53:57,288 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 13:53:57,289 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 13:53:57,290 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 13:53:57,296 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 01:53:57" (1/1) ... [2021-06-05 13:53:57,296 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 01:53:57" (1/1) ... [2021-06-05 13:53:57,297 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 01:53:57" (1/1) ... [2021-06-05 13:53:57,297 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 01:53:57" (1/1) ... [2021-06-05 13:53:57,300 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 01:53:57" (1/1) ... [2021-06-05 13:53:57,302 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 01:53:57" (1/1) ... [2021-06-05 13:53:57,302 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 01:53:57" (1/1) ... [2021-06-05 13:53:57,303 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 13:53:57,304 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 13:53:57,304 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 13:53:57,304 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 13:53:57,305 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 01:53:57" (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 13:53:57,387 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 13:53:57,387 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 13:53:57,387 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 13:53:57,387 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 13:53:57,387 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 13:53:57,388 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 13:53:57,388 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 13:53:57,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 13:53:57,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 13:53:57,389 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 13:53:57,574 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 13:53:57,574 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-05 13:53:57,575 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-06-05 13:53:57,575 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-06-05 13:53:57,576 INFO L202 PluginConnector]: Adding new model unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 01:53:57 BoogieIcfgContainer [2021-06-05 13:53:57,576 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 13:53:57,578 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 13:53:57,578 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 13:53:57,581 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 13:53:57,581 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 01:53:57" (1/2) ... [2021-06-05 13:53:57,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e20eb85 and model type unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 01:53:57, skipping insertion in model container [2021-06-05 13:53:57,582 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 01:53:57" (2/2) ... [2021-06-05 13:53:57,583 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-2.wvr.bpl [2021-06-05 13:53:57,588 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 13:53:57,588 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 13:53:57,589 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 13:53:57,589 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 13:53:57,616 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 13:53:57,641 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 13:53:57,677 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 13:53:57,677 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 13:53:57,677 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 13:53:57,677 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 13:53:57,677 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 13:53:57,677 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 13:53:57,677 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 13:53:57,677 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 13:53:57,685 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 46 flow [2021-06-05 13:53:57,693 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 13:53:57,694 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 13:53:57,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-06-05 13:53:57,700 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:57,700 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:57,700 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:57,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:57,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1694861722, now seen corresponding path program 1 times [2021-06-05 13:53:57,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:57,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291081380] [2021-06-05 13:53:57,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:57,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:57,894 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 13:53:57,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:57,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291081380] [2021-06-05 13:53:57,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291081380] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:53:57,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:53:57,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 13:53:57,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834066508] [2021-06-05 13:53:57,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 13:53:57,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:57,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 13:53:57,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:53:57,919 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 13:53:57,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:57,963 INFO L93 Difference]: Finished difference Result 22 states and 38 transitions. [2021-06-05 13:53:57,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 13:53:57,964 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 13:53:57,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:57,971 INFO L225 Difference]: With dead ends: 22 [2021-06-05 13:53:57,971 INFO L226 Difference]: Without dead ends: 19 [2021-06-05 13:53:57,972 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:53:57,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-06-05 13:53:58,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-06-05 13:53:58,010 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 13:53:58,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 33 transitions. [2021-06-05 13:53:58,012 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 33 transitions. Word has length 9 [2021-06-05 13:53:58,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:58,013 INFO L482 AbstractCegarLoop]: Abstraction has 19 states and 33 transitions. [2021-06-05 13:53:58,013 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 13:53:58,013 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 33 transitions. [2021-06-05 13:53:58,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 13:53:58,014 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:58,014 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:58,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 13:53:58,015 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:58,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:58,020 INFO L82 PathProgramCache]: Analyzing trace with hash 658584646, now seen corresponding path program 1 times [2021-06-05 13:53:58,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:58,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765611911] [2021-06-05 13:53:58,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:58,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:58,099 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 13:53:58,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:58,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765611911] [2021-06-05 13:53:58,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765611911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:58,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600410241] [2021-06-05 13:53:58,100 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 13:53:58,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:58,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 13:53:58,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:58,232 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 13:53:58,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600410241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:58,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:58,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-06-05 13:53:58,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243936087] [2021-06-05 13:53:58,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:53:58,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:58,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:53:58,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:53:58,236 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 13:53:58,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:58,289 INFO L93 Difference]: Finished difference Result 28 states and 45 transitions. [2021-06-05 13:53:58,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 13:53:58,289 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 13:53:58,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:58,291 INFO L225 Difference]: With dead ends: 28 [2021-06-05 13:53:58,291 INFO L226 Difference]: Without dead ends: 28 [2021-06-05 13:53:58,295 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 33.7ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:53:58,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-06-05 13:53:58,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2021-06-05 13:53:58,303 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 13:53:58,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 35 transitions. [2021-06-05 13:53:58,306 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 35 transitions. Word has length 10 [2021-06-05 13:53:58,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:58,306 INFO L482 AbstractCegarLoop]: Abstraction has 19 states and 35 transitions. [2021-06-05 13:53:58,307 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 13:53:58,307 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 35 transitions. [2021-06-05 13:53:58,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 13:53:58,308 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:58,308 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:58,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 13:53:58,529 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:58,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:58,530 INFO L82 PathProgramCache]: Analyzing trace with hash -978034129, now seen corresponding path program 1 times [2021-06-05 13:53:58,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:58,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508010934] [2021-06-05 13:53:58,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:58,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:58,573 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 13:53:58,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:58,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508010934] [2021-06-05 13:53:58,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508010934] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:53:58,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:53:58,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 13:53:58,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122350737] [2021-06-05 13:53:58,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 13:53:58,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:58,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 13:53:58,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 13:53:58,580 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 13:53:58,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:58,617 INFO L93 Difference]: Finished difference Result 22 states and 36 transitions. [2021-06-05 13:53:58,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 13:53:58,623 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 13:53:58,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:58,624 INFO L225 Difference]: With dead ends: 22 [2021-06-05 13:53:58,624 INFO L226 Difference]: Without dead ends: 18 [2021-06-05 13:53:58,625 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:53:58,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-06-05 13:53:58,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-06-05 13:53:58,630 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 13:53:58,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 31 transitions. [2021-06-05 13:53:58,630 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 31 transitions. Word has length 10 [2021-06-05 13:53:58,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:58,631 INFO L482 AbstractCegarLoop]: Abstraction has 18 states and 31 transitions. [2021-06-05 13:53:58,631 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 13:53:58,631 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 31 transitions. [2021-06-05 13:53:58,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 13:53:58,631 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:58,631 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:58,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 13:53:58,632 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:58,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:58,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1576587559, now seen corresponding path program 2 times [2021-06-05 13:53:58,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:58,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523031614] [2021-06-05 13:53:58,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:58,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:58,666 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 13:53:58,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:58,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523031614] [2021-06-05 13:53:58,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523031614] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:53:58,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:53:58,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 13:53:58,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916724982] [2021-06-05 13:53:58,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 13:53:58,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:58,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 13:53:58,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 13:53:58,669 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 13:53:58,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:58,691 INFO L93 Difference]: Finished difference Result 20 states and 35 transitions. [2021-06-05 13:53:58,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 13:53:58,692 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 13:53:58,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:58,694 INFO L225 Difference]: With dead ends: 20 [2021-06-05 13:53:58,694 INFO L226 Difference]: Without dead ends: 20 [2021-06-05 13:53:58,695 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 13:53:58,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-06-05 13:53:58,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-06-05 13:53:58,700 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 13:53:58,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2021-06-05 13:53:58,702 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2021-06-05 13:53:58,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:58,702 INFO L482 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2021-06-05 13:53:58,702 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 13:53:58,703 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2021-06-05 13:53:58,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 13:53:58,703 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:58,703 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:58,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 13:53:58,704 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:58,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:58,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1035640753, now seen corresponding path program 1 times [2021-06-05 13:53:58,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:58,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639757236] [2021-06-05 13:53:58,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:58,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:58,766 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 13:53:58,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:58,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639757236] [2021-06-05 13:53:58,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639757236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:58,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686772922] [2021-06-05 13:53:58,769 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 13:53:58,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:58,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 13:53:58,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:58,922 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 13:53:58,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686772922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:58,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:58,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-06-05 13:53:58,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592738804] [2021-06-05 13:53:58,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 13:53:58,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:58,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 13:53:58,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 13:53:58,924 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 13:53:58,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:58,943 INFO L93 Difference]: Finished difference Result 24 states and 43 transitions. [2021-06-05 13:53:58,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 13:53:58,944 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 13:53:58,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:58,945 INFO L225 Difference]: With dead ends: 24 [2021-06-05 13:53:58,945 INFO L226 Difference]: Without dead ends: 24 [2021-06-05 13:53:58,945 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 13:53:58,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-06-05 13:53:58,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-06-05 13:53:58,950 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 13:53:58,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 43 transitions. [2021-06-05 13:53:58,951 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 43 transitions. Word has length 11 [2021-06-05 13:53:58,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:58,951 INFO L482 AbstractCegarLoop]: Abstraction has 24 states and 43 transitions. [2021-06-05 13:53:58,952 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 13:53:58,952 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 43 transitions. [2021-06-05 13:53:58,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 13:53:58,952 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:58,952 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:59,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:59,169 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:59,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:59,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1473521199, now seen corresponding path program 2 times [2021-06-05 13:53:59,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:59,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112106626] [2021-06-05 13:53:59,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:59,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:59,222 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 13:53:59,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:59,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112106626] [2021-06-05 13:53:59,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112106626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:59,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709668021] [2021-06-05 13:53:59,227 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 13:53:59,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:53:59,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:59,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:53:59,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:59,343 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:53:59,344 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 13:53:59,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:53:59,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:53:59,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:53:59,353 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-06-05 13:53:59,368 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 13:53:59,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709668021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:59,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:59,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-06-05 13:53:59,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108516877] [2021-06-05 13:53:59,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:53:59,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:59,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:53:59,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:53:59,370 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 13:53:59,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:59,415 INFO L93 Difference]: Finished difference Result 54 states and 96 transitions. [2021-06-05 13:53:59,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:53:59,416 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 13:53:59,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:59,419 INFO L225 Difference]: With dead ends: 54 [2021-06-05 13:53:59,419 INFO L226 Difference]: Without dead ends: 51 [2021-06-05 13:53:59,419 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 32.4ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:53:59,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-06-05 13:53:59,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2021-06-05 13:53:59,428 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 13:53:59,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 70 transitions. [2021-06-05 13:53:59,429 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 70 transitions. Word has length 12 [2021-06-05 13:53:59,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:59,429 INFO L482 AbstractCegarLoop]: Abstraction has 34 states and 70 transitions. [2021-06-05 13:53:59,429 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 13:53:59,429 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 70 transitions. [2021-06-05 13:53:59,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 13:53:59,431 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:59,431 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:59,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:59,645 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:59,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:59,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1077921553, now seen corresponding path program 3 times [2021-06-05 13:53:59,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:59,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681304105] [2021-06-05 13:53:59,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:59,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:59,672 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 13:53:59,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:59,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681304105] [2021-06-05 13:53:59,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681304105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:59,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410058466] [2021-06-05 13:53:59,673 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 13:53:59,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 13:53:59,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:59,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:53:59,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:59,777 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:53:59,777 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 13:53:59,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:53:59,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:53:59,784 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:53:59,784 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-06-05 13:53:59,804 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 13:53:59,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410058466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:59,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:59,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-06-05 13:53:59,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219340374] [2021-06-05 13:53:59,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:53:59,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:59,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:53:59,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:53:59,806 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 13:53:59,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:59,842 INFO L93 Difference]: Finished difference Result 61 states and 117 transitions. [2021-06-05 13:53:59,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:53:59,842 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 13:53:59,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:59,843 INFO L225 Difference]: With dead ends: 61 [2021-06-05 13:53:59,843 INFO L226 Difference]: Without dead ends: 58 [2021-06-05 13:53:59,844 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 38.6ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:53:59,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-06-05 13:53:59,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 39. [2021-06-05 13:53:59,847 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 13:53:59,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 87 transitions. [2021-06-05 13:53:59,848 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 87 transitions. Word has length 12 [2021-06-05 13:53:59,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:59,849 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 87 transitions. [2021-06-05 13:53:59,849 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 13:53:59,849 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 87 transitions. [2021-06-05 13:53:59,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 13:53:59,849 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:59,850 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:00,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:00,073 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:00,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:00,073 INFO L82 PathProgramCache]: Analyzing trace with hash -452129241, now seen corresponding path program 4 times [2021-06-05 13:54:00,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:00,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529823361] [2021-06-05 13:54:00,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:00,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:00,130 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 13:54:00,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:00,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529823361] [2021-06-05 13:54:00,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529823361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:00,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874844916] [2021-06-05 13:54:00,130 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 13:54:00,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:54:00,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:00,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:54:00,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:00,218 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:54:00,218 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 13:54:00,223 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:54:00,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:54:00,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:54:00,228 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-06-05 13:54:00,239 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 13:54:00,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874844916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:00,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:00,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-06-05 13:54:00,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971666638] [2021-06-05 13:54:00,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:54:00,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:00,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:54:00,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:54:00,241 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 13:54:00,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:00,293 INFO L93 Difference]: Finished difference Result 68 states and 138 transitions. [2021-06-05 13:54:00,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:54:00,295 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 13:54:00,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:00,297 INFO L225 Difference]: With dead ends: 68 [2021-06-05 13:54:00,297 INFO L226 Difference]: Without dead ends: 65 [2021-06-05 13:54:00,297 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 36.5ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:54:00,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-06-05 13:54:00,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 46. [2021-06-05 13:54:00,309 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 13:54:00,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 108 transitions. [2021-06-05 13:54:00,310 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 108 transitions. Word has length 12 [2021-06-05 13:54:00,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:00,310 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 108 transitions. [2021-06-05 13:54:00,311 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 13:54:00,311 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 108 transitions. [2021-06-05 13:54:00,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:54:00,311 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:00,311 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:00,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:00,525 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:00,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:00,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1948130383, now seen corresponding path program 5 times [2021-06-05 13:54:00,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:00,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304655983] [2021-06-05 13:54:00,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:00,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:00,581 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 13:54:00,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:00,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304655983] [2021-06-05 13:54:00,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304655983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:00,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450062852] [2021-06-05 13:54:00,582 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 13:54:00,611 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:54:00,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:00,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:54:00,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:00,679 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 13:54:00,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450062852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:00,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:00,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 13:54:00,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424229806] [2021-06-05 13:54:00,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:54:00,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:00,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:54:00,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:54:00,682 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 13:54:00,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:00,763 INFO L93 Difference]: Finished difference Result 90 states and 168 transitions. [2021-06-05 13:54:00,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:54:00,763 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 13:54:00,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:00,764 INFO L225 Difference]: With dead ends: 90 [2021-06-05 13:54:00,764 INFO L226 Difference]: Without dead ends: 90 [2021-06-05 13:54:00,764 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 61.6ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:54:00,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-05 13:54:00,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 46. [2021-06-05 13:54:00,768 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 13:54:00,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 110 transitions. [2021-06-05 13:54:00,769 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 110 transitions. Word has length 13 [2021-06-05 13:54:00,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:00,769 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 110 transitions. [2021-06-05 13:54:00,769 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 13:54:00,769 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 110 transitions. [2021-06-05 13:54:00,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:54:00,770 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:00,770 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:00,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:00,992 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:00,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:00,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1542411386, now seen corresponding path program 6 times [2021-06-05 13:54:00,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:00,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990635105] [2021-06-05 13:54:00,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:00,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:01,031 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 13:54:01,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:01,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990635105] [2021-06-05 13:54:01,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990635105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:01,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328019739] [2021-06-05 13:54:01,032 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 13:54:01,056 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 13:54:01,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:01,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:54:01,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:01,099 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 13:54:01,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328019739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:01,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:01,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 13:54:01,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649353912] [2021-06-05 13:54:01,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:54:01,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:01,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:54:01,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:54:01,101 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 13:54:01,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:01,195 INFO L93 Difference]: Finished difference Result 87 states and 172 transitions. [2021-06-05 13:54:01,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:54:01,195 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 13:54:01,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:01,196 INFO L225 Difference]: With dead ends: 87 [2021-06-05 13:54:01,196 INFO L226 Difference]: Without dead ends: 82 [2021-06-05 13:54:01,197 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 62.8ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:54:01,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-06-05 13:54:01,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 56. [2021-06-05 13:54:01,205 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 13:54:01,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 133 transitions. [2021-06-05 13:54:01,206 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 133 transitions. Word has length 13 [2021-06-05 13:54:01,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:01,206 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 133 transitions. [2021-06-05 13:54:01,206 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 13:54:01,206 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 133 transitions. [2021-06-05 13:54:01,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:54:01,207 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:01,207 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:01,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 13:54:01,409 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:01,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:01,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1142142321, now seen corresponding path program 7 times [2021-06-05 13:54:01,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:01,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7435894] [2021-06-05 13:54:01,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:01,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:01,450 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 13:54:01,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:01,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7435894] [2021-06-05 13:54:01,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7435894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:01,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418546400] [2021-06-05 13:54:01,451 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 13:54:01,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:01,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:54:01,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:01,525 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 13:54:01,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418546400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:01,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:01,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 13:54:01,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909494410] [2021-06-05 13:54:01,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:54:01,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:01,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:54:01,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:54:01,528 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 13:54:01,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:01,595 INFO L93 Difference]: Finished difference Result 71 states and 152 transitions. [2021-06-05 13:54:01,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:54:01,595 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 13:54:01,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:01,596 INFO L225 Difference]: With dead ends: 71 [2021-06-05 13:54:01,596 INFO L226 Difference]: Without dead ends: 70 [2021-06-05 13:54:01,597 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:54:01,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-06-05 13:54:01,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 57. [2021-06-05 13:54:01,604 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 13:54:01,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 133 transitions. [2021-06-05 13:54:01,606 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 133 transitions. Word has length 13 [2021-06-05 13:54:01,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:01,606 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 133 transitions. [2021-06-05 13:54:01,606 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 13:54:01,606 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 133 transitions. [2021-06-05 13:54:01,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:54:01,608 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:01,608 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:01,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 13:54:01,825 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:01,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:01,826 INFO L82 PathProgramCache]: Analyzing trace with hash 2059198674, now seen corresponding path program 8 times [2021-06-05 13:54:01,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:01,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333216566] [2021-06-05 13:54:01,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:01,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:01,861 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 13:54:01,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:01,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333216566] [2021-06-05 13:54:01,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333216566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:01,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208734130] [2021-06-05 13:54:01,862 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 13:54:01,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:54:01,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:01,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:54:01,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:01,984 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 13:54:01,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208734130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:01,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:01,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 13:54:01,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994692033] [2021-06-05 13:54:01,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:54:01,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:01,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:54:01,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:54:01,985 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 13:54:02,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:02,021 INFO L93 Difference]: Finished difference Result 88 states and 173 transitions. [2021-06-05 13:54:02,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:54:02,021 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 13:54:02,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:02,022 INFO L225 Difference]: With dead ends: 88 [2021-06-05 13:54:02,022 INFO L226 Difference]: Without dead ends: 88 [2021-06-05 13:54:02,022 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 51.6ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:54:02,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-05 13:54:02,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 57. [2021-06-05 13:54:02,032 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 13:54:02,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 133 transitions. [2021-06-05 13:54:02,033 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 133 transitions. Word has length 13 [2021-06-05 13:54:02,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:02,033 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 133 transitions. [2021-06-05 13:54:02,033 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 13:54:02,033 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 133 transitions. [2021-06-05 13:54:02,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:54:02,034 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:02,034 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:02,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:02,251 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:02,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:02,251 INFO L82 PathProgramCache]: Analyzing trace with hash 22479943, now seen corresponding path program 9 times [2021-06-05 13:54:02,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:02,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456138137] [2021-06-05 13:54:02,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:02,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:02,286 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 13:54:02,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:02,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456138137] [2021-06-05 13:54:02,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456138137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:02,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730533016] [2021-06-05 13:54:02,286 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 13:54:02,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:54:02,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:02,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:54:02,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:02,348 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 13:54:02,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730533016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:02,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:02,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 13:54:02,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111175396] [2021-06-05 13:54:02,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:54:02,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:02,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:54:02,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:54:02,350 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 13:54:02,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:02,380 INFO L93 Difference]: Finished difference Result 97 states and 193 transitions. [2021-06-05 13:54:02,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:54:02,380 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 13:54:02,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:02,381 INFO L225 Difference]: With dead ends: 97 [2021-06-05 13:54:02,381 INFO L226 Difference]: Without dead ends: 97 [2021-06-05 13:54:02,381 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 25.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:54:02,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-06-05 13:54:02,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 60. [2021-06-05 13:54:02,384 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 13:54:02,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 143 transitions. [2021-06-05 13:54:02,384 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 143 transitions. Word has length 13 [2021-06-05 13:54:02,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:02,384 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 143 transitions. [2021-06-05 13:54:02,384 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 13:54:02,385 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 143 transitions. [2021-06-05 13:54:02,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:54:02,385 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:02,385 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:02,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:02,608 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:02,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:02,609 INFO L82 PathProgramCache]: Analyzing trace with hash 967241926, now seen corresponding path program 10 times [2021-06-05 13:54:02,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:02,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667479213] [2021-06-05 13:54:02,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:02,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:02,643 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 13:54:02,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:02,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667479213] [2021-06-05 13:54:02,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667479213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:02,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524374642] [2021-06-05 13:54:02,643 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 13:54:02,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:54:02,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:02,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:54:02,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:02,697 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 13:54:02,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524374642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:02,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:02,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 13:54:02,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527932368] [2021-06-05 13:54:02,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:54:02,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:02,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:54:02,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:54:02,699 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 13:54:02,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:02,759 INFO L93 Difference]: Finished difference Result 99 states and 200 transitions. [2021-06-05 13:54:02,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:54:02,760 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 13:54:02,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:02,761 INFO L225 Difference]: With dead ends: 99 [2021-06-05 13:54:02,761 INFO L226 Difference]: Without dead ends: 97 [2021-06-05 13:54:02,761 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 34.6ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:54:02,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-06-05 13:54:02,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 64. [2021-06-05 13:54:02,764 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 13:54:02,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2021-06-05 13:54:02,764 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 13 [2021-06-05 13:54:02,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:02,764 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2021-06-05 13:54:02,764 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 13:54:02,765 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2021-06-05 13:54:02,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:54:02,765 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:02,765 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:02,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 13:54:02,977 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:02,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:02,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1767934633, now seen corresponding path program 11 times [2021-06-05 13:54:02,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:02,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281397544] [2021-06-05 13:54:02,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:02,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:03,014 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 13:54:03,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:03,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281397544] [2021-06-05 13:54:03,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281397544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:03,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240764841] [2021-06-05 13:54:03,015 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 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 13:54:03,037 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:54:03,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:03,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:54:03,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:03,067 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 13:54:03,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240764841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:03,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:03,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 13:54:03,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109710805] [2021-06-05 13:54:03,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:54:03,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:03,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:54:03,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:54:03,069 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 13:54:03,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:03,126 INFO L93 Difference]: Finished difference Result 101 states and 205 transitions. [2021-06-05 13:54:03,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:54:03,126 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 13:54:03,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:03,127 INFO L225 Difference]: With dead ends: 101 [2021-06-05 13:54:03,127 INFO L226 Difference]: Without dead ends: 100 [2021-06-05 13:54:03,129 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 35.0ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:54:03,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-05 13:54:03,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2021-06-05 13:54:03,132 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 13:54:03,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 156 transitions. [2021-06-05 13:54:03,133 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 156 transitions. Word has length 13 [2021-06-05 13:54:03,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:03,133 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 156 transitions. [2021-06-05 13:54:03,133 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 13:54:03,133 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 156 transitions. [2021-06-05 13:54:03,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:54:03,134 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:03,134 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:03,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 13:54:03,357 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:03,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:03,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1609976310, now seen corresponding path program 12 times [2021-06-05 13:54:03,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:03,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815800128] [2021-06-05 13:54:03,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:03,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:03,397 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 13:54:03,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:03,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815800128] [2021-06-05 13:54:03,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815800128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:03,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609617673] [2021-06-05 13:54:03,397 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 13:54:03,431 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:54:03,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:03,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:54:03,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:03,460 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 13:54:03,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609617673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:03,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:03,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 13:54:03,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360694985] [2021-06-05 13:54:03,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:54:03,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:03,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:54:03,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:54:03,462 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 13:54:03,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:03,490 INFO L93 Difference]: Finished difference Result 98 states and 199 transitions. [2021-06-05 13:54:03,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:54:03,491 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 13:54:03,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:03,492 INFO L225 Difference]: With dead ends: 98 [2021-06-05 13:54:03,492 INFO L226 Difference]: Without dead ends: 98 [2021-06-05 13:54:03,492 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 32.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:54:03,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-06-05 13:54:03,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2021-06-05 13:54:03,494 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 13:54:03,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 156 transitions. [2021-06-05 13:54:03,495 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 156 transitions. Word has length 13 [2021-06-05 13:54:03,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:03,495 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 156 transitions. [2021-06-05 13:54:03,495 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 13:54:03,495 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 156 transitions. [2021-06-05 13:54:03,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:54:03,495 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:03,496 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:03,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 13:54:03,705 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:03,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:03,705 INFO L82 PathProgramCache]: Analyzing trace with hash -816419355, now seen corresponding path program 13 times [2021-06-05 13:54:03,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:03,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130571194] [2021-06-05 13:54:03,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:03,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:03,736 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 13:54:03,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:03,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130571194] [2021-06-05 13:54:03,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130571194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:03,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095119444] [2021-06-05 13:54:03,737 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 13:54:03,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:03,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:54:03,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:03,812 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 13:54:03,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095119444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:03,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:03,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 13:54:03,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161020425] [2021-06-05 13:54:03,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:54:03,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:03,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:54:03,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:54:03,813 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 13:54:03,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:03,884 INFO L93 Difference]: Finished difference Result 94 states and 196 transitions. [2021-06-05 13:54:03,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:54:03,884 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 13:54:03,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:03,885 INFO L225 Difference]: With dead ends: 94 [2021-06-05 13:54:03,885 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 13:54:03,885 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 60.0ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:54:03,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 13:54:03,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2021-06-05 13:54:03,887 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 13:54:03,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 157 transitions. [2021-06-05 13:54:03,888 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 157 transitions. Word has length 13 [2021-06-05 13:54:03,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:03,888 INFO L482 AbstractCegarLoop]: Abstraction has 65 states and 157 transitions. [2021-06-05 13:54:03,888 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 13:54:03,889 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 157 transitions. [2021-06-05 13:54:03,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:54:03,889 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:03,889 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:04,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:04,113 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:04,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:04,113 INFO L82 PathProgramCache]: Analyzing trace with hash 955943652, now seen corresponding path program 14 times [2021-06-05 13:54:04,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:04,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520644966] [2021-06-05 13:54:04,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:04,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:04,146 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 13:54:04,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:04,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520644966] [2021-06-05 13:54:04,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520644966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:04,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988526640] [2021-06-05 13:54:04,146 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 13:54:04,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:54:04,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:04,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:54:04,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:04,217 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 13:54:04,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988526640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:04,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:04,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 13:54:04,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592374366] [2021-06-05 13:54:04,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:54:04,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:04,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:54:04,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:54:04,219 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 13:54:04,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:04,282 INFO L93 Difference]: Finished difference Result 101 states and 203 transitions. [2021-06-05 13:54:04,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:54:04,289 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 13:54:04,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:04,290 INFO L225 Difference]: With dead ends: 101 [2021-06-05 13:54:04,290 INFO L226 Difference]: Without dead ends: 101 [2021-06-05 13:54:04,290 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 42.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:54:04,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-06-05 13:54:04,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 65. [2021-06-05 13:54:04,291 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 13:54:04,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 157 transitions. [2021-06-05 13:54:04,292 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 157 transitions. Word has length 13 [2021-06-05 13:54:04,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:04,292 INFO L482 AbstractCegarLoop]: Abstraction has 65 states and 157 transitions. [2021-06-05 13:54:04,292 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 13:54:04,292 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 157 transitions. [2021-06-05 13:54:04,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:54:04,292 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:04,292 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:04,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 13:54:04,497 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:04,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:04,497 INFO L82 PathProgramCache]: Analyzing trace with hash -2052794865, now seen corresponding path program 15 times [2021-06-05 13:54:04,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:04,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944683790] [2021-06-05 13:54:04,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:04,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:04,539 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 13:54:04,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:04,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944683790] [2021-06-05 13:54:04,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944683790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:04,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336356539] [2021-06-05 13:54:04,540 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 13:54:04,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:54:04,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:04,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:54:04,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:04,620 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 13:54:04,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336356539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:04,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:04,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-06-05 13:54:04,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805510108] [2021-06-05 13:54:04,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:54:04,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:04,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:54:04,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:54:04,621 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 13:54:04,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:04,669 INFO L93 Difference]: Finished difference Result 118 states and 240 transitions. [2021-06-05 13:54:04,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:54:04,674 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 13:54:04,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:04,675 INFO L225 Difference]: With dead ends: 118 [2021-06-05 13:54:04,675 INFO L226 Difference]: Without dead ends: 118 [2021-06-05 13:54:04,675 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 36.4ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:54:04,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-06-05 13:54:04,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 69. [2021-06-05 13:54:04,679 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 13:54:04,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 172 transitions. [2021-06-05 13:54:04,680 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 172 transitions. Word has length 13 [2021-06-05 13:54:04,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:04,681 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 172 transitions. [2021-06-05 13:54:04,681 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 13:54:04,681 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 172 transitions. [2021-06-05 13:54:04,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:54:04,681 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:04,682 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:04,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:04,897 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:04,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:04,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1108032882, now seen corresponding path program 16 times [2021-06-05 13:54:04,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:04,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35077641] [2021-06-05 13:54:04,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:04,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:04,937 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 13:54:04,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:04,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35077641] [2021-06-05 13:54:04,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35077641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:04,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517435697] [2021-06-05 13:54:04,938 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 13:54:04,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:54:04,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:04,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:54:04,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:05,008 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 13:54:05,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517435697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:05,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:05,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-06-05 13:54:05,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013363469] [2021-06-05 13:54:05,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:54:05,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:05,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:54:05,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:54:05,010 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 13:54:05,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:05,099 INFO L93 Difference]: Finished difference Result 109 states and 231 transitions. [2021-06-05 13:54:05,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:54:05,100 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 13:54:05,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:05,101 INFO L225 Difference]: With dead ends: 109 [2021-06-05 13:54:05,101 INFO L226 Difference]: Without dead ends: 107 [2021-06-05 13:54:05,101 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 57.4ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:54:05,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-06-05 13:54:05,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2021-06-05 13:54:05,104 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 13:54:05,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 192 transitions. [2021-06-05 13:54:05,105 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 192 transitions. Word has length 13 [2021-06-05 13:54:05,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:05,105 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 192 transitions. [2021-06-05 13:54:05,105 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 13:54:05,105 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 192 transitions. [2021-06-05 13:54:05,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:54:05,105 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:05,105 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:05,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:05,321 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:05,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:05,321 INFO L82 PathProgramCache]: Analyzing trace with hash -307340175, now seen corresponding path program 17 times [2021-06-05 13:54:05,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:05,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672434814] [2021-06-05 13:54:05,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:05,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:05,363 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 13:54:05,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:05,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672434814] [2021-06-05 13:54:05,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672434814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:05,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63809577] [2021-06-05 13:54:05,363 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 13:54:05,396 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:54:05,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:05,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:54:05,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:05,435 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 13:54:05,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63809577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:05,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:05,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-06-05 13:54:05,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92299506] [2021-06-05 13:54:05,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:54:05,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:05,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:54:05,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:54:05,436 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 13:54:05,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:05,506 INFO L93 Difference]: Finished difference Result 114 states and 244 transitions. [2021-06-05 13:54:05,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:54:05,507 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 13:54:05,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:05,508 INFO L225 Difference]: With dead ends: 114 [2021-06-05 13:54:05,508 INFO L226 Difference]: Without dead ends: 113 [2021-06-05 13:54:05,508 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 60.8ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:54:05,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-06-05 13:54:05,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 75. [2021-06-05 13:54:05,511 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 13:54:05,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 191 transitions. [2021-06-05 13:54:05,512 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 191 transitions. Word has length 13 [2021-06-05 13:54:05,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:05,512 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 191 transitions. [2021-06-05 13:54:05,512 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 13:54:05,512 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 191 transitions. [2021-06-05 13:54:05,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:54:05,513 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:05,513 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:05,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 13:54:05,736 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:05,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:05,737 INFO L82 PathProgramCache]: Analyzing trace with hash 609716178, now seen corresponding path program 18 times [2021-06-05 13:54:05,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:05,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57344615] [2021-06-05 13:54:05,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:05,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:05,777 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 13:54:05,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:05,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57344615] [2021-06-05 13:54:05,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57344615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:05,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383091044] [2021-06-05 13:54:05,778 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 13:54:05,821 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:54:05,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:05,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:54:05,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:05,862 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 13:54:05,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383091044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:05,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:05,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-06-05 13:54:05,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659504109] [2021-06-05 13:54:05,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:54:05,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:05,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:54:05,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:54:05,864 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 13:54:05,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:05,930 INFO L93 Difference]: Finished difference Result 102 states and 223 transitions. [2021-06-05 13:54:05,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:54:05,930 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 13:54:05,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:05,931 INFO L225 Difference]: With dead ends: 102 [2021-06-05 13:54:05,931 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 13:54:05,931 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 56.3ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:54:05,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 13:54:05,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 74. [2021-06-05 13:54:05,934 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 13:54:05,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2021-06-05 13:54:05,935 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 13 [2021-06-05 13:54:05,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:05,935 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2021-06-05 13:54:05,935 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 13:54:05,935 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2021-06-05 13:54:05,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:54:05,936 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:05,936 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:06,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:06,159 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:06,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:06,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1403273133, now seen corresponding path program 19 times [2021-06-05 13:54:06,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:06,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237365407] [2021-06-05 13:54:06,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:06,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:06,195 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 13:54:06,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:06,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237365407] [2021-06-05 13:54:06,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237365407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:06,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727586098] [2021-06-05 13:54:06,196 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 13:54:06,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:06,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:54:06,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:06,275 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 13:54:06,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727586098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:06,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:06,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 13:54:06,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278198751] [2021-06-05 13:54:06,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:54:06,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:06,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:54:06,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:54:06,276 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 13:54:06,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:06,361 INFO L93 Difference]: Finished difference Result 118 states and 244 transitions. [2021-06-05 13:54:06,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:54:06,362 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 13:54:06,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:06,362 INFO L225 Difference]: With dead ends: 118 [2021-06-05 13:54:06,363 INFO L226 Difference]: Without dead ends: 116 [2021-06-05 13:54:06,363 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 62.6ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:54:06,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-06-05 13:54:06,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 74. [2021-06-05 13:54:06,365 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 13:54:06,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 184 transitions. [2021-06-05 13:54:06,366 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 184 transitions. Word has length 13 [2021-06-05 13:54:06,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:06,366 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 184 transitions. [2021-06-05 13:54:06,366 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 13:54:06,366 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 184 transitions. [2021-06-05 13:54:06,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:54:06,366 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:06,366 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:06,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 13:54:06,581 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:06,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:06,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1119331156, now seen corresponding path program 20 times [2021-06-05 13:54:06,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:06,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302842534] [2021-06-05 13:54:06,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:06,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:06,614 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 13:54:06,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:06,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302842534] [2021-06-05 13:54:06,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302842534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:06,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885350625] [2021-06-05 13:54:06,615 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 13:54:06,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:54:06,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:06,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:54:06,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:06,696 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 13:54:06,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885350625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:06,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:06,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 13:54:06,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619143571] [2021-06-05 13:54:06,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:54:06,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:06,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:54:06,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:54:06,697 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 13:54:06,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:06,778 INFO L93 Difference]: Finished difference Result 103 states and 223 transitions. [2021-06-05 13:54:06,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:54:06,778 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 13:54:06,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:06,779 INFO L225 Difference]: With dead ends: 103 [2021-06-05 13:54:06,779 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 13:54:06,779 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 66.4ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:54:06,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 13:54:06,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 74. [2021-06-05 13:54:06,782 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 13:54:06,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 184 transitions. [2021-06-05 13:54:06,782 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 184 transitions. Word has length 13 [2021-06-05 13:54:06,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:06,782 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 184 transitions. [2021-06-05 13:54:06,782 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 13:54:06,782 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 184 transitions. [2021-06-05 13:54:06,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:54:06,783 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:06,783 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:06,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 13:54:06,997 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:06,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:06,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1402289167, now seen corresponding path program 21 times [2021-06-05 13:54:06,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:06,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134742045] [2021-06-05 13:54:06,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:07,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:07,054 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 13:54:07,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:07,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134742045] [2021-06-05 13:54:07,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134742045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:07,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466398268] [2021-06-05 13:54:07,055 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 13:54:07,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:54:07,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:07,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:54:07,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:07,146 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 13:54:07,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466398268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:07,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:07,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-06-05 13:54:07,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025809965] [2021-06-05 13:54:07,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:54:07,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:07,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:54:07,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:54:07,148 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 13:54:07,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:07,229 INFO L93 Difference]: Finished difference Result 107 states and 246 transitions. [2021-06-05 13:54:07,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:54:07,230 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 13:54:07,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:07,231 INFO L225 Difference]: With dead ends: 107 [2021-06-05 13:54:07,231 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 13:54:07,231 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 83.2ms TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:54:07,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 13:54:07,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 73. [2021-06-05 13:54:07,233 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 13:54:07,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 182 transitions. [2021-06-05 13:54:07,234 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 182 transitions. Word has length 13 [2021-06-05 13:54:07,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:07,234 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 182 transitions. [2021-06-05 13:54:07,234 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 13:54:07,234 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 182 transitions. [2021-06-05 13:54:07,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:54:07,234 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:07,235 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:07,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:07,458 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:07,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:07,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1114776338, now seen corresponding path program 22 times [2021-06-05 13:54:07,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:07,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794143264] [2021-06-05 13:54:07,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:07,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:07,497 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 13:54:07,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:07,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794143264] [2021-06-05 13:54:07,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794143264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:07,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599913110] [2021-06-05 13:54:07,498 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 13:54:07,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:54:07,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:07,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:54:07,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:07,573 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 13:54:07,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599913110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:07,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:07,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-06-05 13:54:07,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90741591] [2021-06-05 13:54:07,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:54:07,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:07,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:54:07,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:54:07,574 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 13:54:07,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:07,721 INFO L93 Difference]: Finished difference Result 107 states and 252 transitions. [2021-06-05 13:54:07,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:54:07,722 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 13:54:07,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:07,722 INFO L225 Difference]: With dead ends: 107 [2021-06-05 13:54:07,722 INFO L226 Difference]: Without dead ends: 107 [2021-06-05 13:54:07,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 127.0ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:54:07,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-06-05 13:54:07,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2021-06-05 13:54:07,725 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 13:54:07,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 211 transitions. [2021-06-05 13:54:07,725 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 211 transitions. Word has length 13 [2021-06-05 13:54:07,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:07,725 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 211 transitions. [2021-06-05 13:54:07,726 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 13:54:07,726 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 211 transitions. [2021-06-05 13:54:07,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:54:07,726 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:07,726 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:07,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 13:54:07,947 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:07,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:07,948 INFO L82 PathProgramCache]: Analyzing trace with hash 285571430, now seen corresponding path program 23 times [2021-06-05 13:54:07,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:07,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518528210] [2021-06-05 13:54:07,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:07,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:07,977 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 13:54:07,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:07,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518528210] [2021-06-05 13:54:07,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518528210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:07,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579255939] [2021-06-05 13:54:07,978 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 13:54:08,000 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:54:08,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:08,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:54:08,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:08,060 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 13:54:08,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579255939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:08,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:08,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 13:54:08,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756440938] [2021-06-05 13:54:08,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:54:08,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:08,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:54:08,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:54:08,065 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 13:54:08,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:08,120 INFO L93 Difference]: Finished difference Result 227 states and 579 transitions. [2021-06-05 13:54:08,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:54:08,120 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 13:54:08,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:08,121 INFO L225 Difference]: With dead ends: 227 [2021-06-05 13:54:08,121 INFO L226 Difference]: Without dead ends: 225 [2021-06-05 13:54:08,122 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 48.7ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:54:08,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-06-05 13:54:08,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 168. [2021-06-05 13:54:08,133 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 13:54:08,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 440 transitions. [2021-06-05 13:54:08,134 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 440 transitions. Word has length 14 [2021-06-05 13:54:08,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:08,134 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 440 transitions. [2021-06-05 13:54:08,135 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 13:54:08,135 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 440 transitions. [2021-06-05 13:54:08,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:54:08,136 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:08,136 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:08,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:08,360 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:08,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:08,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1118463878, now seen corresponding path program 24 times [2021-06-05 13:54:08,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:08,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382002608] [2021-06-05 13:54:08,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:08,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:08,391 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 13:54:08,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:08,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382002608] [2021-06-05 13:54:08,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382002608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:08,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150120298] [2021-06-05 13:54:08,391 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 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 13:54:08,416 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:54:08,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:08,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:54:08,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:08,538 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:54:08,539 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 13:54:08,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:54:08,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:54:08,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:54:08,590 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 13:54:08,597 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 13:54:08,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150120298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:08,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:08,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-06-05 13:54:08,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242261077] [2021-06-05 13:54:08,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:54:08,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:08,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:54:08,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:54:08,598 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 13:54:08,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:08,668 INFO L93 Difference]: Finished difference Result 248 states and 589 transitions. [2021-06-05 13:54:08,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:54:08,668 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 13:54:08,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:08,670 INFO L225 Difference]: With dead ends: 248 [2021-06-05 13:54:08,670 INFO L226 Difference]: Without dead ends: 245 [2021-06-05 13:54:08,670 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 76.7ms TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:54:08,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-06-05 13:54:08,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 196. [2021-06-05 13:54:08,675 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 13:54:08,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 520 transitions. [2021-06-05 13:54:08,677 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 520 transitions. Word has length 15 [2021-06-05 13:54:08,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:08,677 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 520 transitions. [2021-06-05 13:54:08,677 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 13:54:08,677 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 520 transitions. [2021-06-05 13:54:08,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:54:08,678 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:08,678 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:08,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 13:54:08,895 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:08,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:08,896 INFO L82 PathProgramCache]: Analyzing trace with hash -678148380, now seen corresponding path program 25 times [2021-06-05 13:54:08,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:08,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783864608] [2021-06-05 13:54:08,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:08,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:08,927 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 13:54:08,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:08,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783864608] [2021-06-05 13:54:08,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783864608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:08,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539216844] [2021-06-05 13:54:08,927 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 13:54:08,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:08,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:54:08,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:09,078 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:54:09,078 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 13:54:09,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:54:09,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:54:09,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:54:09,114 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 13:54:09,121 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 13:54:09,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539216844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:09,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:09,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-06-05 13:54:09,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386486764] [2021-06-05 13:54:09,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:54:09,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:09,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:54:09,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:54:09,123 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 13:54:09,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:09,204 INFO L93 Difference]: Finished difference Result 296 states and 729 transitions. [2021-06-05 13:54:09,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:54:09,205 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 13:54:09,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:09,206 INFO L225 Difference]: With dead ends: 296 [2021-06-05 13:54:09,207 INFO L226 Difference]: Without dead ends: 292 [2021-06-05 13:54:09,207 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 91.4ms TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:54:09,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-06-05 13:54:09,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 224. [2021-06-05 13:54:09,212 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 13:54:09,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 622 transitions. [2021-06-05 13:54:09,213 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 622 transitions. Word has length 15 [2021-06-05 13:54:09,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:09,213 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 622 transitions. [2021-06-05 13:54:09,213 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 13:54:09,214 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 622 transitions. [2021-06-05 13:54:09,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:54:09,214 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:09,214 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:09,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 13:54:09,429 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:09,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:09,429 INFO L82 PathProgramCache]: Analyzing trace with hash -519315694, now seen corresponding path program 26 times [2021-06-05 13:54:09,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:09,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656839998] [2021-06-05 13:54:09,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:09,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:09,460 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 13:54:09,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:09,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656839998] [2021-06-05 13:54:09,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656839998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:09,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711150789] [2021-06-05 13:54:09,460 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 13:54:09,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:54:09,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:09,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:54:09,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:09,593 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:54:09,594 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 13:54:09,631 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:54:09,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:54:09,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:54:09,633 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 13:54:09,641 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 13:54:09,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711150789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:09,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:09,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-06-05 13:54:09,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292920616] [2021-06-05 13:54:09,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:54:09,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:09,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:54:09,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:54:09,642 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 13:54:09,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:09,736 INFO L93 Difference]: Finished difference Result 353 states and 901 transitions. [2021-06-05 13:54:09,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:54:09,736 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 13:54:09,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:09,738 INFO L225 Difference]: With dead ends: 353 [2021-06-05 13:54:09,738 INFO L226 Difference]: Without dead ends: 349 [2021-06-05 13:54:09,738 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 78.5ms TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:54:09,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-06-05 13:54:09,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 269. [2021-06-05 13:54:09,745 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 13:54:09,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 779 transitions. [2021-06-05 13:54:09,746 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 779 transitions. Word has length 15 [2021-06-05 13:54:09,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:09,746 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 779 transitions. [2021-06-05 13:54:09,746 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 13:54:09,746 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 779 transitions. [2021-06-05 13:54:09,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:54:09,747 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:09,747 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:09,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 13:54:09,965 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:09,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:09,965 INFO L82 PathProgramCache]: Analyzing trace with hash 109530276, now seen corresponding path program 27 times [2021-06-05 13:54:09,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:09,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268996032] [2021-06-05 13:54:09,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:09,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:09,996 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 13:54:09,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:09,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268996032] [2021-06-05 13:54:09,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268996032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:09,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046234424] [2021-06-05 13:54:09,997 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 13:54:10,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:54:10,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:10,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:54:10,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:10,146 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:54:10,146 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 13:54:10,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:54:10,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:54:10,183 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:54:10,183 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 13:54:10,191 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 13:54:10,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046234424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:10,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:10,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-06-05 13:54:10,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355041402] [2021-06-05 13:54:10,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:54:10,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:10,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:54:10,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:54:10,192 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 13:54:10,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:10,281 INFO L93 Difference]: Finished difference Result 397 states and 1046 transitions. [2021-06-05 13:54:10,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:54:10,281 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 13:54:10,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:10,283 INFO L225 Difference]: With dead ends: 397 [2021-06-05 13:54:10,283 INFO L226 Difference]: Without dead ends: 394 [2021-06-05 13:54:10,284 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 80.8ms TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:54:10,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-06-05 13:54:10,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 318. [2021-06-05 13:54:10,291 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 13:54:10,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 938 transitions. [2021-06-05 13:54:10,292 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 938 transitions. Word has length 15 [2021-06-05 13:54:10,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:10,292 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 938 transitions. [2021-06-05 13:54:10,292 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 13:54:10,292 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 938 transitions. [2021-06-05 13:54:10,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:54:10,294 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:10,294 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:10,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:10,517 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:10,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:10,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1871081134, now seen corresponding path program 28 times [2021-06-05 13:54:10,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:10,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769158154] [2021-06-05 13:54:10,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:10,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:10,544 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 13:54:10,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:10,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769158154] [2021-06-05 13:54:10,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769158154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:10,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891048329] [2021-06-05 13:54:10,545 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 13:54:10,568 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:54:10,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:10,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:54:10,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:10,666 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:54:10,666 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 13:54:10,689 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:54:10,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:54:10,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:54:10,691 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 13:54:10,699 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 13:54:10,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891048329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:10,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:10,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-06-05 13:54:10,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392169725] [2021-06-05 13:54:10,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:54:10,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:10,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:54:10,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:54:10,700 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 13:54:10,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:10,797 INFO L93 Difference]: Finished difference Result 427 states and 1156 transitions. [2021-06-05 13:54:10,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:54:10,798 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 13:54:10,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:10,800 INFO L225 Difference]: With dead ends: 427 [2021-06-05 13:54:10,800 INFO L226 Difference]: Without dead ends: 424 [2021-06-05 13:54:10,801 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 71.8ms TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:54:10,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-06-05 13:54:10,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 357. [2021-06-05 13:54:10,810 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 13:54:10,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1062 transitions. [2021-06-05 13:54:10,812 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1062 transitions. Word has length 15 [2021-06-05 13:54:10,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:10,812 INFO L482 AbstractCegarLoop]: Abstraction has 357 states and 1062 transitions. [2021-06-05 13:54:10,812 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 13:54:10,812 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1062 transitions. [2021-06-05 13:54:10,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:54:10,813 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:10,813 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:11,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 13:54:11,029 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:11,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:11,029 INFO L82 PathProgramCache]: Analyzing trace with hash 335713551, now seen corresponding path program 29 times [2021-06-05 13:54:11,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:11,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32851079] [2021-06-05 13:54:11,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:11,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:11,081 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 13:54:11,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:11,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32851079] [2021-06-05 13:54:11,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32851079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:11,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991344658] [2021-06-05 13:54:11,082 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 13:54:11,112 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:54:11,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:11,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:54:11,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:11,156 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 13:54:11,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991344658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:11,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:11,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 13:54:11,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922520195] [2021-06-05 13:54:11,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:54:11,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:11,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:54:11,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:54:11,158 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 13:54:11,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:11,306 INFO L93 Difference]: Finished difference Result 482 states and 1270 transitions. [2021-06-05 13:54:11,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:54:11,306 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 13:54:11,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:11,309 INFO L225 Difference]: With dead ends: 482 [2021-06-05 13:54:11,309 INFO L226 Difference]: Without dead ends: 475 [2021-06-05 13:54:11,310 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 110.9ms TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:54:11,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-06-05 13:54:11,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 372. [2021-06-05 13:54:11,319 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 13:54:11,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1107 transitions. [2021-06-05 13:54:11,322 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1107 transitions. Word has length 16 [2021-06-05 13:54:11,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:11,322 INFO L482 AbstractCegarLoop]: Abstraction has 372 states and 1107 transitions. [2021-06-05 13:54:11,322 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 13:54:11,322 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1107 transitions. [2021-06-05 13:54:11,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:54:11,323 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:11,323 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:11,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:11,546 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:11,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:11,546 INFO L82 PathProgramCache]: Analyzing trace with hash 2034224775, now seen corresponding path program 30 times [2021-06-05 13:54:11,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:11,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292941892] [2021-06-05 13:54:11,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:11,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:11,589 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 13:54:11,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:11,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292941892] [2021-06-05 13:54:11,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292941892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:11,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301579891] [2021-06-05 13:54:11,590 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 13:54:11,618 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:54:11,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:11,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:54:11,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:11,656 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 13:54:11,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301579891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:11,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:11,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 13:54:11,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070514476] [2021-06-05 13:54:11,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:54:11,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:11,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:54:11,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:54:11,657 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 13:54:11,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:11,703 INFO L93 Difference]: Finished difference Result 490 states and 1284 transitions. [2021-06-05 13:54:11,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:54:11,703 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 13:54:11,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:11,706 INFO L225 Difference]: With dead ends: 490 [2021-06-05 13:54:11,706 INFO L226 Difference]: Without dead ends: 490 [2021-06-05 13:54:11,706 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 36.9ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:54:11,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-06-05 13:54:11,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 352. [2021-06-05 13:54:11,714 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 13:54:11,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1034 transitions. [2021-06-05 13:54:11,716 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1034 transitions. Word has length 16 [2021-06-05 13:54:11,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:11,717 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1034 transitions. [2021-06-05 13:54:11,717 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 13:54:11,717 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1034 transitions. [2021-06-05 13:54:11,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:54:11,718 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:11,718 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:11,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 13:54:11,941 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:11,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:11,941 INFO L82 PathProgramCache]: Analyzing trace with hash 475308401, now seen corresponding path program 31 times [2021-06-05 13:54:11,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:11,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584412926] [2021-06-05 13:54:11,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:11,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:11,982 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 13:54:11,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:11,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584412926] [2021-06-05 13:54:11,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584412926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:11,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156357277] [2021-06-05 13:54:11,983 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 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 13:54:12,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:12,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:54:12,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:12,042 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 13:54:12,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156357277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:12,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:12,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 13:54:12,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938630049] [2021-06-05 13:54:12,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:54:12,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:12,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:54:12,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:54:12,043 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 13:54:12,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:12,131 INFO L93 Difference]: Finished difference Result 466 states and 1205 transitions. [2021-06-05 13:54:12,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:54:12,131 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 13:54:12,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:12,133 INFO L225 Difference]: With dead ends: 466 [2021-06-05 13:54:12,133 INFO L226 Difference]: Without dead ends: 464 [2021-06-05 13:54:12,133 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 57.5ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:54:12,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-06-05 13:54:12,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 360. [2021-06-05 13:54:12,142 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 13:54:12,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1057 transitions. [2021-06-05 13:54:12,143 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1057 transitions. Word has length 16 [2021-06-05 13:54:12,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:12,143 INFO L482 AbstractCegarLoop]: Abstraction has 360 states and 1057 transitions. [2021-06-05 13:54:12,144 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 13:54:12,144 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1057 transitions. [2021-06-05 13:54:12,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:54:12,145 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:12,145 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:12,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable80 [2021-06-05 13:54:12,367 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:12,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:12,368 INFO L82 PathProgramCache]: Analyzing trace with hash -2101909835, now seen corresponding path program 32 times [2021-06-05 13:54:12,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:12,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737124497] [2021-06-05 13:54:12,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:12,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:12,407 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 13:54:12,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:12,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737124497] [2021-06-05 13:54:12,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737124497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:12,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825480238] [2021-06-05 13:54:12,408 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 13:54:12,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:54:12,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:12,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:54:12,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:12,492 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 13:54:12,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825480238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:12,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:12,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 13:54:12,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458079949] [2021-06-05 13:54:12,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:54:12,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:12,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:54:12,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:54:12,495 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 13:54:12,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:12,565 INFO L93 Difference]: Finished difference Result 501 states and 1267 transitions. [2021-06-05 13:54:12,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:54:12,566 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 13:54:12,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:12,568 INFO L225 Difference]: With dead ends: 501 [2021-06-05 13:54:12,568 INFO L226 Difference]: Without dead ends: 501 [2021-06-05 13:54:12,568 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 36.7ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:54:12,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-06-05 13:54:12,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 362. [2021-06-05 13:54:12,576 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 13:54:12,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1063 transitions. [2021-06-05 13:54:12,578 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1063 transitions. Word has length 16 [2021-06-05 13:54:12,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:12,578 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 1063 transitions. [2021-06-05 13:54:12,578 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 13:54:12,578 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1063 transitions. [2021-06-05 13:54:12,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:54:12,579 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:12,579 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:12,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:12,803 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:12,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:12,803 INFO L82 PathProgramCache]: Analyzing trace with hash 464010127, now seen corresponding path program 33 times [2021-06-05 13:54:12,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:12,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488060320] [2021-06-05 13:54:12,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:12,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:12,845 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 13:54:12,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:12,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488060320] [2021-06-05 13:54:12,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488060320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:12,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011145926] [2021-06-05 13:54:12,846 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 13:54:12,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:54:12,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:12,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:54:12,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:12,924 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 13:54:12,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011145926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:12,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:12,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 13:54:12,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472168142] [2021-06-05 13:54:12,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:54:12,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:12,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:54:12,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:54:12,926 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 13:54:12,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:12,996 INFO L93 Difference]: Finished difference Result 535 states and 1337 transitions. [2021-06-05 13:54:12,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:54:12,996 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 13:54:12,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:12,999 INFO L225 Difference]: With dead ends: 535 [2021-06-05 13:54:12,999 INFO L226 Difference]: Without dead ends: 535 [2021-06-05 13:54:12,999 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 54.9ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:54:13,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-06-05 13:54:13,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 337. [2021-06-05 13:54:13,007 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 13:54:13,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 974 transitions. [2021-06-05 13:54:13,008 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 974 transitions. Word has length 16 [2021-06-05 13:54:13,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:13,009 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 974 transitions. [2021-06-05 13:54:13,009 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 13:54:13,009 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 974 transitions. [2021-06-05 13:54:13,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:54:13,010 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:13,010 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:13,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2021-06-05 13:54:13,233 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:13,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:13,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1104154371, now seen corresponding path program 34 times [2021-06-05 13:54:13,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:13,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794082552] [2021-06-05 13:54:13,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:13,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:13,272 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 13:54:13,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:13,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794082552] [2021-06-05 13:54:13,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794082552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:13,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272410646] [2021-06-05 13:54:13,273 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 13:54:13,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:54:13,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:13,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:54:13,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:13,333 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 13:54:13,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272410646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:13,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:13,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 13:54:13,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943733517] [2021-06-05 13:54:13,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:54:13,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:13,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:54:13,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:54:13,336 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 13:54:13,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:13,422 INFO L93 Difference]: Finished difference Result 456 states and 1159 transitions. [2021-06-05 13:54:13,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:54:13,422 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 13:54:13,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:13,424 INFO L225 Difference]: With dead ends: 456 [2021-06-05 13:54:13,424 INFO L226 Difference]: Without dead ends: 454 [2021-06-05 13:54:13,425 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 57.7ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:54:13,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-06-05 13:54:13,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 348. [2021-06-05 13:54:13,432 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 13:54:13,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1004 transitions. [2021-06-05 13:54:13,433 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1004 transitions. Word has length 16 [2021-06-05 13:54:13,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:13,434 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1004 transitions. [2021-06-05 13:54:13,434 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 13:54:13,434 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1004 transitions. [2021-06-05 13:54:13,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:54:13,435 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:13,435 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:13,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:13,658 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:13,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:13,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1473063865, now seen corresponding path program 35 times [2021-06-05 13:54:13,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:13,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202170003] [2021-06-05 13:54:13,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:13,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:13,697 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 13:54:13,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:13,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202170003] [2021-06-05 13:54:13,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202170003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:13,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472697068] [2021-06-05 13:54:13,697 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 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 13:54:13,729 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:54:13,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:13,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:54:13,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:13,777 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 13:54:13,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472697068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:13,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:13,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 13:54:13,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974481540] [2021-06-05 13:54:13,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:54:13,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:13,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:54:13,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:54:13,778 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 13:54:13,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:13,822 INFO L93 Difference]: Finished difference Result 447 states and 1123 transitions. [2021-06-05 13:54:13,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:54:13,823 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 13:54:13,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:13,824 INFO L225 Difference]: With dead ends: 447 [2021-06-05 13:54:13,825 INFO L226 Difference]: Without dead ends: 447 [2021-06-05 13:54:13,825 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 34.0ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:54:13,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-06-05 13:54:13,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 336. [2021-06-05 13:54:13,832 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 13:54:13,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 960 transitions. [2021-06-05 13:54:13,833 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 960 transitions. Word has length 16 [2021-06-05 13:54:13,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:13,833 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 960 transitions. [2021-06-05 13:54:13,834 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 13:54:13,834 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 960 transitions. [2021-06-05 13:54:13,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:54:13,834 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:13,835 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:14,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-06-05 13:54:14,049 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:14,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:14,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1092856097, now seen corresponding path program 36 times [2021-06-05 13:54:14,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:14,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42136900] [2021-06-05 13:54:14,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:14,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:14,090 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 13:54:14,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:14,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42136900] [2021-06-05 13:54:14,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42136900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:14,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824638932] [2021-06-05 13:54:14,090 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 13:54:14,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:54:14,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:14,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:54:14,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:14,153 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 13:54:14,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824638932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:14,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:14,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 13:54:14,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533473576] [2021-06-05 13:54:14,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:54:14,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:14,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:54:14,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:54:14,154 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 13:54:14,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:14,220 INFO L93 Difference]: Finished difference Result 482 states and 1184 transitions. [2021-06-05 13:54:14,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:54:14,220 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 13:54:14,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:14,222 INFO L225 Difference]: With dead ends: 482 [2021-06-05 13:54:14,222 INFO L226 Difference]: Without dead ends: 482 [2021-06-05 13:54:14,223 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 50.0ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:54:14,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-06-05 13:54:14,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 310. [2021-06-05 13:54:14,230 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 13:54:14,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 872 transitions. [2021-06-05 13:54:14,231 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 872 transitions. Word has length 16 [2021-06-05 13:54:14,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:14,231 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 872 transitions. [2021-06-05 13:54:14,231 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 13:54:14,231 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 872 transitions. [2021-06-05 13:54:14,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:54:14,232 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:14,232 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:14,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-06-05 13:54:14,445 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:14,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:14,445 INFO L82 PathProgramCache]: Analyzing trace with hash -968003705, now seen corresponding path program 37 times [2021-06-05 13:54:14,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:14,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851508102] [2021-06-05 13:54:14,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:14,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:14,495 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 13:54:14,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:14,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851508102] [2021-06-05 13:54:14,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851508102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:14,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386448464] [2021-06-05 13:54:14,495 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 13:54:14,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:14,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:54:14,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:14,564 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 13:54:14,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386448464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:14,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:14,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 13:54:14,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305601570] [2021-06-05 13:54:14,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:54:14,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:14,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:54:14,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:54:14,565 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 13:54:14,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:14,662 INFO L93 Difference]: Finished difference Result 536 states and 1380 transitions. [2021-06-05 13:54:14,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:54:14,662 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 13:54:14,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:14,664 INFO L225 Difference]: With dead ends: 536 [2021-06-05 13:54:14,664 INFO L226 Difference]: Without dead ends: 536 [2021-06-05 13:54:14,665 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 77.4ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:54:14,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-06-05 13:54:14,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 382. [2021-06-05 13:54:14,672 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 13:54:14,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1122 transitions. [2021-06-05 13:54:14,673 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1122 transitions. Word has length 16 [2021-06-05 13:54:14,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:14,674 INFO L482 AbstractCegarLoop]: Abstraction has 382 states and 1122 transitions. [2021-06-05 13:54:14,674 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 13:54:14,674 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1122 transitions. [2021-06-05 13:54:14,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:54:14,675 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:14,675 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:14,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:14,897 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:14,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:14,897 INFO L82 PathProgramCache]: Analyzing trace with hash -557719857, now seen corresponding path program 38 times [2021-06-05 13:54:14,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:14,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168908076] [2021-06-05 13:54:14,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:14,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:14,932 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 13:54:14,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:14,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168908076] [2021-06-05 13:54:14,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168908076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:14,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899867735] [2021-06-05 13:54:14,932 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 13:54:14,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:54:14,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:14,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:54:14,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:14,992 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 13:54:14,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899867735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:14,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:14,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 13:54:14,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162841601] [2021-06-05 13:54:14,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:54:14,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:14,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:54:14,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:54:14,994 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 13:54:15,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:15,093 INFO L93 Difference]: Finished difference Result 493 states and 1315 transitions. [2021-06-05 13:54:15,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:54:15,093 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 13:54:15,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:15,095 INFO L225 Difference]: With dead ends: 493 [2021-06-05 13:54:15,095 INFO L226 Difference]: Without dead ends: 489 [2021-06-05 13:54:15,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 62.1ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:54:15,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-06-05 13:54:15,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 406. [2021-06-05 13:54:15,111 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 13:54:15,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1203 transitions. [2021-06-05 13:54:15,113 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1203 transitions. Word has length 16 [2021-06-05 13:54:15,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:15,113 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 1203 transitions. [2021-06-05 13:54:15,113 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 13:54:15,113 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1203 transitions. [2021-06-05 13:54:15,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:54:15,114 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:15,114 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:15,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-05 13:54:15,325 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:15,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:15,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1852698447, now seen corresponding path program 39 times [2021-06-05 13:54:15,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:15,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526481794] [2021-06-05 13:54:15,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:15,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:15,364 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 13:54:15,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:15,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526481794] [2021-06-05 13:54:15,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526481794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:15,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847551126] [2021-06-05 13:54:15,364 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 13:54:15,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:54:15,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:15,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:54:15,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:15,439 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 13:54:15,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847551126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:15,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:15,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 13:54:15,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844890821] [2021-06-05 13:54:15,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:54:15,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:15,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:54:15,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:54:15,441 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 13:54:15,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:15,538 INFO L93 Difference]: Finished difference Result 566 states and 1493 transitions. [2021-06-05 13:54:15,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:54:15,539 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 13:54:15,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:15,541 INFO L225 Difference]: With dead ends: 566 [2021-06-05 13:54:15,541 INFO L226 Difference]: Without dead ends: 566 [2021-06-05 13:54:15,541 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 73.1ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:54:15,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-06-05 13:54:15,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 372. [2021-06-05 13:54:15,548 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 13:54:15,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1082 transitions. [2021-06-05 13:54:15,550 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1082 transitions. Word has length 16 [2021-06-05 13:54:15,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:15,551 INFO L482 AbstractCegarLoop]: Abstraction has 372 states and 1082 transitions. [2021-06-05 13:54:15,551 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 13:54:15,551 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1082 transitions. [2021-06-05 13:54:15,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:54:15,552 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:15,552 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:15,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:15,776 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:15,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:15,776 INFO L82 PathProgramCache]: Analyzing trace with hash -876457039, now seen corresponding path program 40 times [2021-06-05 13:54:15,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:15,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305683851] [2021-06-05 13:54:15,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:15,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:15,812 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 13:54:15,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:15,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305683851] [2021-06-05 13:54:15,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305683851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:15,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30093750] [2021-06-05 13:54:15,814 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 13:54:15,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:54:15,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:15,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:54:15,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:15,872 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 13:54:15,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30093750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:15,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:15,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 13:54:15,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982846178] [2021-06-05 13:54:15,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:54:15,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:15,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:54:15,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:54:15,874 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 13:54:15,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:15,957 INFO L93 Difference]: Finished difference Result 471 states and 1219 transitions. [2021-06-05 13:54:15,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:54:15,958 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 13:54:15,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:15,960 INFO L225 Difference]: With dead ends: 471 [2021-06-05 13:54:15,960 INFO L226 Difference]: Without dead ends: 467 [2021-06-05 13:54:15,960 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:54:15,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-06-05 13:54:15,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 379. [2021-06-05 13:54:15,968 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 13:54:15,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1102 transitions. [2021-06-05 13:54:15,969 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1102 transitions. Word has length 16 [2021-06-05 13:54:15,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:15,969 INFO L482 AbstractCegarLoop]: Abstraction has 379 states and 1102 transitions. [2021-06-05 13:54:15,969 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 13:54:15,969 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1102 transitions. [2021-06-05 13:54:15,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:54:15,970 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:15,970 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:16,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 13:54:16,189 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:16,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:16,189 INFO L82 PathProgramCache]: Analyzing trace with hash 841292021, now seen corresponding path program 41 times [2021-06-05 13:54:16,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:16,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512121781] [2021-06-05 13:54:16,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:16,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:16,228 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 13:54:16,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:16,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512121781] [2021-06-05 13:54:16,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512121781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:16,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674793262] [2021-06-05 13:54:16,229 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 13:54:16,271 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:54:16,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:16,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:54:16,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:16,304 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 13:54:16,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674793262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:16,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:16,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 13:54:16,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577100624] [2021-06-05 13:54:16,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:54:16,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:16,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:54:16,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:54:16,305 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 13:54:16,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:16,357 INFO L93 Difference]: Finished difference Result 489 states and 1264 transitions. [2021-06-05 13:54:16,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:54:16,358 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 13:54:16,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:16,359 INFO L225 Difference]: With dead ends: 489 [2021-06-05 13:54:16,360 INFO L226 Difference]: Without dead ends: 489 [2021-06-05 13:54:16,360 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 43.3ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:54:16,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-06-05 13:54:16,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 380. [2021-06-05 13:54:16,366 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 13:54:16,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1105 transitions. [2021-06-05 13:54:16,368 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1105 transitions. Word has length 16 [2021-06-05 13:54:16,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:16,368 INFO L482 AbstractCegarLoop]: Abstraction has 380 states and 1105 transitions. [2021-06-05 13:54:16,368 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 13:54:16,368 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1105 transitions. [2021-06-05 13:54:16,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:54:16,369 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:16,369 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:16,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:16,589 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:16,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:16,589 INFO L82 PathProgramCache]: Analyzing trace with hash -887755313, now seen corresponding path program 42 times [2021-06-05 13:54:16,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:16,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550101306] [2021-06-05 13:54:16,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:16,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:16,623 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 13:54:16,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:16,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550101306] [2021-06-05 13:54:16,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550101306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:16,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513440303] [2021-06-05 13:54:16,624 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 13:54:16,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:54:16,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:16,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:54:16,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:16,684 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 13:54:16,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513440303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:16,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:16,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 13:54:16,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244422016] [2021-06-05 13:54:16,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:54:16,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:16,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:54:16,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:54:16,686 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 13:54:16,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:16,735 INFO L93 Difference]: Finished difference Result 456 states and 1186 transitions. [2021-06-05 13:54:16,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:54:16,735 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 13:54:16,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:16,736 INFO L225 Difference]: With dead ends: 456 [2021-06-05 13:54:16,736 INFO L226 Difference]: Without dead ends: 456 [2021-06-05 13:54:16,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 43.9ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:54:16,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-06-05 13:54:16,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 359. [2021-06-05 13:54:16,749 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 13:54:16,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 1035 transitions. [2021-06-05 13:54:16,750 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 1035 transitions. Word has length 16 [2021-06-05 13:54:16,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:16,750 INFO L482 AbstractCegarLoop]: Abstraction has 359 states and 1035 transitions. [2021-06-05 13:54:16,750 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 13:54:16,750 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 1035 transitions. [2021-06-05 13:54:16,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:54:16,751 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:16,751 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:16,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:16,965 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:16,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:16,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1346352181, now seen corresponding path program 43 times [2021-06-05 13:54:16,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:16,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220318377] [2021-06-05 13:54:16,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:16,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:17,001 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 13:54:17,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:17,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220318377] [2021-06-05 13:54:17,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220318377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:17,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098348824] [2021-06-05 13:54:17,002 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 13:54:17,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:17,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:54:17,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:17,062 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 13:54:17,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098348824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:17,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:17,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 13:54:17,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930598346] [2021-06-05 13:54:17,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:54:17,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:17,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:54:17,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:54:17,063 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 13:54:17,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:17,137 INFO L93 Difference]: Finished difference Result 466 states and 1194 transitions. [2021-06-05 13:54:17,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:54:17,138 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 13:54:17,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:17,139 INFO L225 Difference]: With dead ends: 466 [2021-06-05 13:54:17,139 INFO L226 Difference]: Without dead ends: 466 [2021-06-05 13:54:17,140 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 65.1ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:54:17,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-06-05 13:54:17,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 341. [2021-06-05 13:54:17,146 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 13:54:17,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 974 transitions. [2021-06-05 13:54:17,147 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 974 transitions. Word has length 16 [2021-06-05 13:54:17,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:17,147 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 974 transitions. [2021-06-05 13:54:17,147 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 13:54:17,147 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 974 transitions. [2021-06-05 13:54:17,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:54:17,148 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:17,148 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:17,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:17,372 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:17,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:17,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1884207759, now seen corresponding path program 44 times [2021-06-05 13:54:17,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:17,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041170873] [2021-06-05 13:54:17,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:17,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:17,422 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 13:54:17,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:17,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041170873] [2021-06-05 13:54:17,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041170873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:17,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415507837] [2021-06-05 13:54:17,423 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 13:54:17,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:54:17,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:17,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:54:17,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:17,499 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 13:54:17,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415507837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:17,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:17,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 13:54:17,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364260978] [2021-06-05 13:54:17,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:54:17,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:17,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:54:17,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:54:17,500 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 13:54:17,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:17,654 INFO L93 Difference]: Finished difference Result 533 states and 1377 transitions. [2021-06-05 13:54:17,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:54:17,655 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 13:54:17,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:17,657 INFO L225 Difference]: With dead ends: 533 [2021-06-05 13:54:17,657 INFO L226 Difference]: Without dead ends: 533 [2021-06-05 13:54:17,657 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 118.8ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:54:17,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-06-05 13:54:17,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 403. [2021-06-05 13:54:17,665 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 13:54:17,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1174 transitions. [2021-06-05 13:54:17,666 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1174 transitions. Word has length 16 [2021-06-05 13:54:17,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:17,667 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 1174 transitions. [2021-06-05 13:54:17,667 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 13:54:17,667 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1174 transitions. [2021-06-05 13:54:17,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:54:17,668 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:17,668 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:17,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:17,891 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:17,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:17,891 INFO L82 PathProgramCache]: Analyzing trace with hash 984700935, now seen corresponding path program 45 times [2021-06-05 13:54:17,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:17,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132085978] [2021-06-05 13:54:17,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:17,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:17,941 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 13:54:17,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:17,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132085978] [2021-06-05 13:54:17,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132085978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:17,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390535375] [2021-06-05 13:54:17,941 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 13:54:17,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:54:17,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:17,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:54:17,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:18,010 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 13:54:18,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390535375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:18,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:18,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-06-05 13:54:18,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179700196] [2021-06-05 13:54:18,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:54:18,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:18,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:54:18,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:54:18,011 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 13:54:18,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:18,159 INFO L93 Difference]: Finished difference Result 489 states and 1285 transitions. [2021-06-05 13:54:18,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:54:18,159 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 13:54:18,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:18,161 INFO L225 Difference]: With dead ends: 489 [2021-06-05 13:54:18,161 INFO L226 Difference]: Without dead ends: 485 [2021-06-05 13:54:18,161 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 108.7ms TimeCoverageRelationStatistics Valid=119, Invalid=223, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:54:18,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-06-05 13:54:18,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 391. [2021-06-05 13:54:18,167 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 13:54:18,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 1131 transitions. [2021-06-05 13:54:18,168 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 1131 transitions. Word has length 16 [2021-06-05 13:54:18,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:18,169 INFO L482 AbstractCegarLoop]: Abstraction has 391 states and 1131 transitions. [2021-06-05 13:54:18,169 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 13:54:18,169 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 1131 transitions. [2021-06-05 13:54:18,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:54:18,170 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:18,170 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:18,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-06-05 13:54:18,393 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:18,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:18,393 INFO L82 PathProgramCache]: Analyzing trace with hash -868338745, now seen corresponding path program 46 times [2021-06-05 13:54:18,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:18,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425829138] [2021-06-05 13:54:18,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:18,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:18,468 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 13:54:18,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:18,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425829138] [2021-06-05 13:54:18,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425829138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:18,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105697517] [2021-06-05 13:54:18,468 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 13:54:18,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:54:18,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:18,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:54:18,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:18,546 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 13:54:18,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105697517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:18,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:18,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 13:54:18,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200805462] [2021-06-05 13:54:18,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:54:18,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:18,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:54:18,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:54:18,547 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 13:54:18,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:18,703 INFO L93 Difference]: Finished difference Result 523 states and 1384 transitions. [2021-06-05 13:54:18,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:54:18,703 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 13:54:18,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:18,705 INFO L225 Difference]: With dead ends: 523 [2021-06-05 13:54:18,705 INFO L226 Difference]: Without dead ends: 523 [2021-06-05 13:54:18,705 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 151.7ms TimeCoverageRelationStatistics Valid=168, Invalid=338, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:54:18,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-06-05 13:54:18,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 386. [2021-06-05 13:54:18,711 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 13:54:18,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1114 transitions. [2021-06-05 13:54:18,712 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1114 transitions. Word has length 16 [2021-06-05 13:54:18,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:18,713 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 1114 transitions. [2021-06-05 13:54:18,713 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 13:54:18,713 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1114 transitions. [2021-06-05 13:54:18,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:54:18,714 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:18,714 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:18,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:18,928 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:18,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:18,928 INFO L82 PathProgramCache]: Analyzing trace with hash -2145868605, now seen corresponding path program 47 times [2021-06-05 13:54:18,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:18,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338903507] [2021-06-05 13:54:18,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:18,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:18,975 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 13:54:18,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:18,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338903507] [2021-06-05 13:54:18,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338903507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:18,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785276699] [2021-06-05 13:54:18,976 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 13:54:19,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:54:19,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:19,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:54:19,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:19,049 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 13:54:19,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785276699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:19,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:19,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2021-06-05 13:54:19,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582241104] [2021-06-05 13:54:19,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:54:19,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:19,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:54:19,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:54:19,050 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 13:54:19,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:19,146 INFO L93 Difference]: Finished difference Result 454 states and 1208 transitions. [2021-06-05 13:54:19,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:54:19,147 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 13:54:19,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:19,149 INFO L225 Difference]: With dead ends: 454 [2021-06-05 13:54:19,149 INFO L226 Difference]: Without dead ends: 452 [2021-06-05 13:54:19,149 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 77.1ms TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:54:19,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-06-05 13:54:19,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 395. [2021-06-05 13:54:19,155 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 13:54:19,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1142 transitions. [2021-06-05 13:54:19,156 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1142 transitions. Word has length 16 [2021-06-05 13:54:19,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:19,156 INFO L482 AbstractCegarLoop]: Abstraction has 395 states and 1142 transitions. [2021-06-05 13:54:19,156 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 13:54:19,156 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1142 transitions. [2021-06-05 13:54:19,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:54:19,157 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:19,157 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:19,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:19,373 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:19,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:19,373 INFO L82 PathProgramCache]: Analyzing trace with hash -428119545, now seen corresponding path program 48 times [2021-06-05 13:54:19,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:19,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162799424] [2021-06-05 13:54:19,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:19,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:19,428 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 13:54:19,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:19,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162799424] [2021-06-05 13:54:19,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162799424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:19,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385938091] [2021-06-05 13:54:19,429 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 13:54:19,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:54:19,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:19,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:54:19,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:19,504 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 13:54:19,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385938091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:19,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:19,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2021-06-05 13:54:19,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962876723] [2021-06-05 13:54:19,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:54:19,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:19,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:54:19,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:54:19,505 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 13:54:19,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:19,602 INFO L93 Difference]: Finished difference Result 476 states and 1251 transitions. [2021-06-05 13:54:19,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:54:19,602 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 13:54:19,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:19,604 INFO L225 Difference]: With dead ends: 476 [2021-06-05 13:54:19,604 INFO L226 Difference]: Without dead ends: 476 [2021-06-05 13:54:19,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 92.5ms TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:54:19,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-06-05 13:54:19,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 396. [2021-06-05 13:54:19,610 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 13:54:19,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1143 transitions. [2021-06-05 13:54:19,611 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1143 transitions. Word has length 16 [2021-06-05 13:54:19,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:19,611 INFO L482 AbstractCegarLoop]: Abstraction has 396 states and 1143 transitions. [2021-06-05 13:54:19,611 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 13:54:19,611 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1143 transitions. [2021-06-05 13:54:19,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:54:19,612 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:19,612 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:19,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-06-05 13:54:19,829 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:19,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:19,829 INFO L82 PathProgramCache]: Analyzing trace with hash 2137800417, now seen corresponding path program 49 times [2021-06-05 13:54:19,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:19,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300230723] [2021-06-05 13:54:19,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:19,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:19,879 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 13:54:19,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:19,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300230723] [2021-06-05 13:54:19,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300230723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:19,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293046503] [2021-06-05 13:54:19,879 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 13:54:19,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:19,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:54:19,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:19,982 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 13:54:19,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293046503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:19,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:19,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 13:54:19,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740920357] [2021-06-05 13:54:19,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:54:19,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:19,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:54:19,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:54:19,983 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 13:54:20,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:20,091 INFO L93 Difference]: Finished difference Result 482 states and 1265 transitions. [2021-06-05 13:54:20,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:54:20,092 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 13:54:20,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:20,094 INFO L225 Difference]: With dead ends: 482 [2021-06-05 13:54:20,094 INFO L226 Difference]: Without dead ends: 482 [2021-06-05 13:54:20,094 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 96.4ms TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:54:20,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-06-05 13:54:20,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 397. [2021-06-05 13:54:20,100 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 13:54:20,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1146 transitions. [2021-06-05 13:54:20,101 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1146 transitions. Word has length 16 [2021-06-05 13:54:20,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:20,101 INFO L482 AbstractCegarLoop]: Abstraction has 397 states and 1146 transitions. [2021-06-05 13:54:20,101 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 13:54:20,101 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1146 transitions. [2021-06-05 13:54:20,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:54:20,102 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:20,102 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:20,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:20,322 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:20,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:20,322 INFO L82 PathProgramCache]: Analyzing trace with hash 76940615, now seen corresponding path program 50 times [2021-06-05 13:54:20,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:20,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317501185] [2021-06-05 13:54:20,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:20,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:20,375 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 13:54:20,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:20,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317501185] [2021-06-05 13:54:20,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317501185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:20,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023387618] [2021-06-05 13:54:20,376 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 13:54:20,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:54:20,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:20,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:54:20,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:20,468 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 13:54:20,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023387618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:20,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:20,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 13:54:20,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605381243] [2021-06-05 13:54:20,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:54:20,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:20,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:54:20,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:54:20,469 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 13:54:20,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:20,605 INFO L93 Difference]: Finished difference Result 476 states and 1290 transitions. [2021-06-05 13:54:20,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:54:20,605 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 13:54:20,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:20,607 INFO L225 Difference]: With dead ends: 476 [2021-06-05 13:54:20,607 INFO L226 Difference]: Without dead ends: 476 [2021-06-05 13:54:20,607 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 131.0ms TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:54:20,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-06-05 13:54:20,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 420. [2021-06-05 13:54:20,611 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 13:54:20,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1220 transitions. [2021-06-05 13:54:20,612 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1220 transitions. Word has length 16 [2021-06-05 13:54:20,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:20,612 INFO L482 AbstractCegarLoop]: Abstraction has 420 states and 1220 transitions. [2021-06-05 13:54:20,612 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 13:54:20,616 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1220 transitions. [2021-06-05 13:54:20,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:54:20,617 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:20,617 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:20,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-05 13:54:20,829 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:20,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:20,829 INFO L82 PathProgramCache]: Analyzing trace with hash 614796193, now seen corresponding path program 51 times [2021-06-05 13:54:20,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:20,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866137428] [2021-06-05 13:54:20,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:20,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:20,882 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 13:54:20,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:20,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866137428] [2021-06-05 13:54:20,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866137428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:20,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313730635] [2021-06-05 13:54:20,882 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 13:54:20,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:54:20,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:20,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:54:20,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:20,981 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 13:54:20,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313730635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:20,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:20,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 13:54:20,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989086493] [2021-06-05 13:54:20,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:54:20,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:20,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:54:20,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:54:20,983 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 13:54:21,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:21,134 INFO L93 Difference]: Finished difference Result 486 states and 1311 transitions. [2021-06-05 13:54:21,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:54:21,134 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 13:54:21,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:21,136 INFO L225 Difference]: With dead ends: 486 [2021-06-05 13:54:21,136 INFO L226 Difference]: Without dead ends: 486 [2021-06-05 13:54:21,136 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 143.2ms TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:54:21,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-06-05 13:54:21,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 416. [2021-06-05 13:54:21,142 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 13:54:21,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1207 transitions. [2021-06-05 13:54:21,143 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1207 transitions. Word has length 16 [2021-06-05 13:54:21,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:21,143 INFO L482 AbstractCegarLoop]: Abstraction has 416 states and 1207 transitions. [2021-06-05 13:54:21,143 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 13:54:21,143 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1207 transitions. [2021-06-05 13:54:21,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:54:21,144 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:21,144 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:21,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 13:54:21,367 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:21,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:21,367 INFO L82 PathProgramCache]: Analyzing trace with hash 108449927, now seen corresponding path program 52 times [2021-06-05 13:54:21,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:21,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745561030] [2021-06-05 13:54:21,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:21,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:21,423 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 13:54:21,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:21,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745561030] [2021-06-05 13:54:21,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745561030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:21,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480178619] [2021-06-05 13:54:21,424 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 13:54:21,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:54:21,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:21,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:54:21,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:21,498 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 13:54:21,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480178619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:21,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:21,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 13:54:21,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395065293] [2021-06-05 13:54:21,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:54:21,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:21,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:54:21,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:54:21,499 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 13:54:21,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:21,687 INFO L93 Difference]: Finished difference Result 533 states and 1453 transitions. [2021-06-05 13:54:21,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:54:21,687 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 13:54:21,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:21,689 INFO L225 Difference]: With dead ends: 533 [2021-06-05 13:54:21,689 INFO L226 Difference]: Without dead ends: 533 [2021-06-05 13:54:21,689 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 180.2ms TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:54:21,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-06-05 13:54:21,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 424. [2021-06-05 13:54:21,694 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 13:54:21,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 1232 transitions. [2021-06-05 13:54:21,695 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 1232 transitions. Word has length 16 [2021-06-05 13:54:21,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:21,695 INFO L482 AbstractCegarLoop]: Abstraction has 424 states and 1232 transitions. [2021-06-05 13:54:21,695 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 13:54:21,695 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 1232 transitions. [2021-06-05 13:54:21,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:54:21,696 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:21,696 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:21,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 13:54:21,904 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:21,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:21,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1580915834, now seen corresponding path program 53 times [2021-06-05 13:54:21,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:21,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042035263] [2021-06-05 13:54:21,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:21,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:21,956 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 13:54:21,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:21,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042035263] [2021-06-05 13:54:21,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042035263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:21,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897165182] [2021-06-05 13:54:21,956 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 13:54:21,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:54:21,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:21,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:54:21,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:22,044 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 13:54:22,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897165182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:22,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:22,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 13:54:22,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299689318] [2021-06-05 13:54:22,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:54:22,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:22,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:54:22,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:54:22,045 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 13:54:22,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:22,197 INFO L93 Difference]: Finished difference Result 523 states and 1364 transitions. [2021-06-05 13:54:22,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:54:22,198 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 13:54:22,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:22,199 INFO L225 Difference]: With dead ends: 523 [2021-06-05 13:54:22,199 INFO L226 Difference]: Without dead ends: 517 [2021-06-05 13:54:22,200 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 143.9ms TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:54:22,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-06-05 13:54:22,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 417. [2021-06-05 13:54:22,205 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 13:54:22,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 1197 transitions. [2021-06-05 13:54:22,206 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 1197 transitions. Word has length 17 [2021-06-05 13:54:22,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:22,206 INFO L482 AbstractCegarLoop]: Abstraction has 417 states and 1197 transitions. [2021-06-05 13:54:22,207 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 13:54:22,207 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 1197 transitions. [2021-06-05 13:54:22,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:54:22,207 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:22,207 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:22,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 13:54:22,421 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:22,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:22,421 INFO L82 PathProgramCache]: Analyzing trace with hash 237372592, now seen corresponding path program 54 times [2021-06-05 13:54:22,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:22,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899740823] [2021-06-05 13:54:22,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:22,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:22,465 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 13:54:22,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:22,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899740823] [2021-06-05 13:54:22,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899740823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:22,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329765354] [2021-06-05 13:54:22,465 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 13:54:22,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:54:22,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:22,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:54:22,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:22,524 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 13:54:22,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329765354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:22,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:22,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 13:54:22,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519678102] [2021-06-05 13:54:22,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:54:22,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:22,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:54:22,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:54:22,526 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 13:54:22,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:22,599 INFO L93 Difference]: Finished difference Result 436 states and 1230 transitions. [2021-06-05 13:54:22,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:54:22,599 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 13:54:22,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:22,600 INFO L225 Difference]: With dead ends: 436 [2021-06-05 13:54:22,600 INFO L226 Difference]: Without dead ends: 434 [2021-06-05 13:54:22,600 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 58.8ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:54:22,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-06-05 13:54:22,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 417. [2021-06-05 13:54:22,604 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 13:54:22,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 1193 transitions. [2021-06-05 13:54:22,605 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 1193 transitions. Word has length 17 [2021-06-05 13:54:22,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:22,605 INFO L482 AbstractCegarLoop]: Abstraction has 417 states and 1193 transitions. [2021-06-05 13:54:22,605 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 13:54:22,605 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 1193 transitions. [2021-06-05 13:54:22,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:54:22,606 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:22,606 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:22,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 13:54:22,809 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:22,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:22,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1705117860, now seen corresponding path program 55 times [2021-06-05 13:54:22,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:22,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003020312] [2021-06-05 13:54:22,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:22,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:22,848 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 13:54:22,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:22,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003020312] [2021-06-05 13:54:22,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003020312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:22,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388860530] [2021-06-05 13:54:22,849 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 13:54:22,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:22,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:54:22,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:22,927 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 13:54:22,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388860530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:22,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:22,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 13:54:22,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678802528] [2021-06-05 13:54:22,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:54:22,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:22,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:54:22,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:54:22,928 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 13:54:22,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:22,976 INFO L93 Difference]: Finished difference Result 505 states and 1323 transitions. [2021-06-05 13:54:22,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:54:22,977 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 13:54:22,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:22,983 INFO L225 Difference]: With dead ends: 505 [2021-06-05 13:54:22,983 INFO L226 Difference]: Without dead ends: 503 [2021-06-05 13:54:22,983 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 42.2ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:54:22,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-06-05 13:54:22,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 420. [2021-06-05 13:54:22,988 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 13:54:22,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1200 transitions. [2021-06-05 13:54:22,989 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1200 transitions. Word has length 17 [2021-06-05 13:54:22,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:22,989 INFO L482 AbstractCegarLoop]: Abstraction has 420 states and 1200 transitions. [2021-06-05 13:54:22,989 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 13:54:22,989 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1200 transitions. [2021-06-05 13:54:22,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:54:22,990 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:22,990 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:23,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-05 13:54:23,205 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:23,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:23,205 INFO L82 PathProgramCache]: Analyzing trace with hash -844394746, now seen corresponding path program 56 times [2021-06-05 13:54:23,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:23,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491409336] [2021-06-05 13:54:23,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:23,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:23,242 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 13:54:23,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:23,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491409336] [2021-06-05 13:54:23,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491409336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:23,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556876250] [2021-06-05 13:54:23,243 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 13:54:23,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:54:23,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:23,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:54:23,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:23,309 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 13:54:23,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556876250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:23,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:23,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-06-05 13:54:23,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850832536] [2021-06-05 13:54:23,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:54:23,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:23,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:54:23,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:54:23,310 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 13:54:23,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:23,366 INFO L93 Difference]: Finished difference Result 516 states and 1337 transitions. [2021-06-05 13:54:23,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:54:23,366 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 13:54:23,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:23,367 INFO L225 Difference]: With dead ends: 516 [2021-06-05 13:54:23,368 INFO L226 Difference]: Without dead ends: 515 [2021-06-05 13:54:23,368 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 50.1ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:54:23,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-06-05 13:54:23,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 415. [2021-06-05 13:54:23,373 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 13:54:23,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1178 transitions. [2021-06-05 13:54:23,374 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1178 transitions. Word has length 17 [2021-06-05 13:54:23,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:23,375 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 1178 transitions. [2021-06-05 13:54:23,375 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 13:54:23,375 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1178 transitions. [2021-06-05 13:54:23,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:54:23,375 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:23,375 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:23,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:23,576 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:23,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:23,576 INFO L82 PathProgramCache]: Analyzing trace with hash 866218562, now seen corresponding path program 57 times [2021-06-05 13:54:23,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:23,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620216252] [2021-06-05 13:54:23,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:23,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:23,628 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 13:54:23,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:23,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620216252] [2021-06-05 13:54:23,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620216252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:23,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576534218] [2021-06-05 13:54:23,628 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) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:23,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:54:23,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:23,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:54:23,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:23,690 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 13:54:23,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576534218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:23,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:23,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 13:54:23,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020009153] [2021-06-05 13:54:23,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:54:23,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:23,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:54:23,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:54:23,691 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 13:54:23,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:23,775 INFO L93 Difference]: Finished difference Result 503 states and 1301 transitions. [2021-06-05 13:54:23,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:54:23,775 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 13:54:23,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:23,777 INFO L225 Difference]: With dead ends: 503 [2021-06-05 13:54:23,777 INFO L226 Difference]: Without dead ends: 500 [2021-06-05 13:54:23,777 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 73.1ms TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:54:23,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-06-05 13:54:23,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 412. [2021-06-05 13:54:23,783 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 13:54:23,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 1165 transitions. [2021-06-05 13:54:23,784 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 1165 transitions. Word has length 17 [2021-06-05 13:54:23,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:23,784 INFO L482 AbstractCegarLoop]: Abstraction has 412 states and 1165 transitions. [2021-06-05 13:54:23,784 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 13:54:23,784 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 1165 transitions. [2021-06-05 13:54:23,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:54:23,785 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:23,785 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:23,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 13:54:23,997 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:23,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:23,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1939343738, now seen corresponding path program 58 times [2021-06-05 13:54:23,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:23,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105805289] [2021-06-05 13:54:23,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:23,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:24,042 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 13:54:24,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:24,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105805289] [2021-06-05 13:54:24,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105805289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:24,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147719079] [2021-06-05 13:54:24,042 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 13:54:24,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:54:24,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:24,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:54:24,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:24,119 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 13:54:24,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147719079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:24,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:24,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-06-05 13:54:24,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788441989] [2021-06-05 13:54:24,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:54:24,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:24,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:54:24,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:54:24,120 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 13:54:24,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:24,232 INFO L93 Difference]: Finished difference Result 478 states and 1266 transitions. [2021-06-05 13:54:24,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:54:24,233 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 13:54:24,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:24,233 INFO L225 Difference]: With dead ends: 478 [2021-06-05 13:54:24,234 INFO L226 Difference]: Without dead ends: 474 [2021-06-05 13:54:24,234 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 88.9ms TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:54:24,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-06-05 13:54:24,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 412. [2021-06-05 13:54:24,238 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 13:54:24,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 1160 transitions. [2021-06-05 13:54:24,239 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 1160 transitions. Word has length 17 [2021-06-05 13:54:24,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:24,239 INFO L482 AbstractCegarLoop]: Abstraction has 412 states and 1160 transitions. [2021-06-05 13:54:24,239 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 13:54:24,239 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 1160 transitions. [2021-06-05 13:54:24,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:54:24,240 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:24,240 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:24,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:24,440 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:24,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:24,441 INFO L82 PathProgramCache]: Analyzing trace with hash -275493550, now seen corresponding path program 59 times [2021-06-05 13:54:24,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:24,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008789679] [2021-06-05 13:54:24,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:24,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:24,491 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 13:54:24,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:24,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008789679] [2021-06-05 13:54:24,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008789679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:24,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321518433] [2021-06-05 13:54:24,492 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 13:54:24,530 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:54:24,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:24,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:54:24,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:24,565 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 13:54:24,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321518433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:24,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:24,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-06-05 13:54:24,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063497858] [2021-06-05 13:54:24,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:54:24,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:24,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:54:24,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:54:24,566 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 13:54:24,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:24,609 INFO L93 Difference]: Finished difference Result 508 states and 1297 transitions. [2021-06-05 13:54:24,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:54:24,610 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 13:54:24,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:24,610 INFO L225 Difference]: With dead ends: 508 [2021-06-05 13:54:24,610 INFO L226 Difference]: Without dead ends: 506 [2021-06-05 13:54:24,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 54.4ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:54:24,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-06-05 13:54:24,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 409. [2021-06-05 13:54:24,617 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 13:54:24,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1141 transitions. [2021-06-05 13:54:24,618 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1141 transitions. Word has length 17 [2021-06-05 13:54:24,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:24,618 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 1141 transitions. [2021-06-05 13:54:24,619 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 13:54:24,619 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1141 transitions. [2021-06-05 13:54:24,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:54:24,619 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:24,620 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:24,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-06-05 13:54:24,832 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:24,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:24,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1114392848, now seen corresponding path program 60 times [2021-06-05 13:54:24,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:24,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508529603] [2021-06-05 13:54:24,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:24,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:24,878 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 13:54:24,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:24,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508529603] [2021-06-05 13:54:24,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508529603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:24,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025581335] [2021-06-05 13:54:24,878 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 13:54:24,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:54:24,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:24,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:54:24,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:24,946 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 13:54:24,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025581335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:24,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:24,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 13:54:24,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20455653] [2021-06-05 13:54:24,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:54:24,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:24,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:54:24,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:54:24,948 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 13:54:25,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:25,038 INFO L93 Difference]: Finished difference Result 497 states and 1266 transitions. [2021-06-05 13:54:25,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:54:25,038 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 13:54:25,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:25,039 INFO L225 Difference]: With dead ends: 497 [2021-06-05 13:54:25,039 INFO L226 Difference]: Without dead ends: 494 [2021-06-05 13:54:25,040 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 65.4ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:54:25,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-06-05 13:54:25,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 403. [2021-06-05 13:54:25,046 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 13:54:25,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1116 transitions. [2021-06-05 13:54:25,048 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1116 transitions. Word has length 17 [2021-06-05 13:54:25,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:25,048 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 1116 transitions. [2021-06-05 13:54:25,048 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 13:54:25,048 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1116 transitions. [2021-06-05 13:54:25,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:54:25,049 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:25,049 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:25,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:25,265 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:25,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:25,265 INFO L82 PathProgramCache]: Analyzing trace with hash 375012148, now seen corresponding path program 61 times [2021-06-05 13:54:25,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:25,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435987373] [2021-06-05 13:54:25,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:25,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:25,319 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 13:54:25,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:25,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435987373] [2021-06-05 13:54:25,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435987373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:25,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252438169] [2021-06-05 13:54:25,319 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 13:54:25,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:25,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:54:25,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:25,376 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 13:54:25,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252438169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:25,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:25,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-06-05 13:54:25,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203701005] [2021-06-05 13:54:25,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:54:25,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:25,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:54:25,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:54:25,377 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 13:54:25,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:25,484 INFO L93 Difference]: Finished difference Result 496 states and 1249 transitions. [2021-06-05 13:54:25,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:54:25,484 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 13:54:25,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:25,485 INFO L225 Difference]: With dead ends: 496 [2021-06-05 13:54:25,485 INFO L226 Difference]: Without dead ends: 492 [2021-06-05 13:54:25,485 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 84.6ms TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:54:25,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-06-05 13:54:25,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 403. [2021-06-05 13:54:25,489 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 13:54:25,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1108 transitions. [2021-06-05 13:54:25,490 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1108 transitions. Word has length 17 [2021-06-05 13:54:25,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:25,490 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 1108 transitions. [2021-06-05 13:54:25,490 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 13:54:25,490 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1108 transitions. [2021-06-05 13:54:25,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:54:25,491 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:25,491 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:25,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:25,713 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:25,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:25,713 INFO L82 PathProgramCache]: Analyzing trace with hash -698073232, now seen corresponding path program 62 times [2021-06-05 13:54:25,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:25,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729956497] [2021-06-05 13:54:25,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:25,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:25,772 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 13:54:25,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:25,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729956497] [2021-06-05 13:54:25,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729956497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:25,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84516453] [2021-06-05 13:54:25,773 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 13:54:25,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:54:25,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:25,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:54:25,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:25,846 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 13:54:25,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84516453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:25,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:25,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-06-05 13:54:25,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177642550] [2021-06-05 13:54:25,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:54:25,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:25,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:54:25,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:54:25,848 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 13:54:25,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:25,935 INFO L93 Difference]: Finished difference Result 492 states and 1286 transitions. [2021-06-05 13:54:25,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:54:25,935 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 13:54:25,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:25,936 INFO L225 Difference]: With dead ends: 492 [2021-06-05 13:54:25,936 INFO L226 Difference]: Without dead ends: 486 [2021-06-05 13:54:25,936 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 80.1ms TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:54:25,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-06-05 13:54:25,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 404. [2021-06-05 13:54:25,940 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 13:54:25,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1107 transitions. [2021-06-05 13:54:25,940 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1107 transitions. Word has length 17 [2021-06-05 13:54:25,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:25,941 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 1107 transitions. [2021-06-05 13:54:25,941 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 13:54:25,941 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1107 transitions. [2021-06-05 13:54:25,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:54:25,941 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:25,941 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:26,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:26,142 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:26,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:26,142 INFO L82 PathProgramCache]: Analyzing trace with hash -987391290, now seen corresponding path program 63 times [2021-06-05 13:54:26,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:26,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769511232] [2021-06-05 13:54:26,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:26,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:26,184 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 13:54:26,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:26,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769511232] [2021-06-05 13:54:26,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769511232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:26,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072181885] [2021-06-05 13:54:26,185 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 13:54:26,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:54:26,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:26,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:54:26,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:26,246 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 13:54:26,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072181885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:26,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:26,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 13:54:26,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845741938] [2021-06-05 13:54:26,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:54:26,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:26,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:54:26,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:54:26,247 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 13:54:26,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:26,309 INFO L93 Difference]: Finished difference Result 476 states and 1226 transitions. [2021-06-05 13:54:26,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:54:26,309 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 13:54:26,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:26,310 INFO L225 Difference]: With dead ends: 476 [2021-06-05 13:54:26,310 INFO L226 Difference]: Without dead ends: 476 [2021-06-05 13:54:26,310 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 55.6ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:54:26,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-06-05 13:54:26,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 405. [2021-06-05 13:54:26,314 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 13:54:26,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1110 transitions. [2021-06-05 13:54:26,314 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1110 transitions. Word has length 17 [2021-06-05 13:54:26,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:26,314 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 1110 transitions. [2021-06-05 13:54:26,314 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 13:54:26,314 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1110 transitions. [2021-06-05 13:54:26,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:54:26,315 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:26,315 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:26,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 13:54:26,516 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:26,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:26,516 INFO L82 PathProgramCache]: Analyzing trace with hash 844347560, now seen corresponding path program 64 times [2021-06-05 13:54:26,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:26,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507740357] [2021-06-05 13:54:26,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:26,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:26,573 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 13:54:26,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:26,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507740357] [2021-06-05 13:54:26,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507740357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:26,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341735414] [2021-06-05 13:54:26,573 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 13:54:26,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:54:26,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:26,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:54:26,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:26,649 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 13:54:26,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341735414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:26,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:26,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-06-05 13:54:26,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018010887] [2021-06-05 13:54:26,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:54:26,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:26,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:54:26,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:54:26,650 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 13:54:26,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:26,747 INFO L93 Difference]: Finished difference Result 496 states and 1283 transitions. [2021-06-05 13:54:26,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:54:26,747 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 13:54:26,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:26,748 INFO L225 Difference]: With dead ends: 496 [2021-06-05 13:54:26,748 INFO L226 Difference]: Without dead ends: 490 [2021-06-05 13:54:26,748 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 87.2ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:54:26,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-06-05 13:54:26,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 405. [2021-06-05 13:54:26,752 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 13:54:26,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1105 transitions. [2021-06-05 13:54:26,753 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1105 transitions. Word has length 17 [2021-06-05 13:54:26,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:26,753 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 1105 transitions. [2021-06-05 13:54:26,753 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 13:54:26,753 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1105 transitions. [2021-06-05 13:54:26,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:54:26,753 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:26,753 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:26,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 13:54:26,954 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:26,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:26,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1544905116, now seen corresponding path program 65 times [2021-06-05 13:54:26,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:26,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021031172] [2021-06-05 13:54:26,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:26,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:26,989 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 13:54:26,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:26,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021031172] [2021-06-05 13:54:26,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021031172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:26,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013824717] [2021-06-05 13:54:26,990 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 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 13:54:27,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:54:27,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:27,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:54:27,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:27,044 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 13:54:27,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013824717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:27,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:27,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-06-05 13:54:27,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977461556] [2021-06-05 13:54:27,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:54:27,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:27,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:54:27,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:54:27,045 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 13:54:27,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:27,087 INFO L93 Difference]: Finished difference Result 538 states and 1315 transitions. [2021-06-05 13:54:27,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:54:27,088 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 13:54:27,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:27,088 INFO L225 Difference]: With dead ends: 538 [2021-06-05 13:54:27,089 INFO L226 Difference]: Without dead ends: 538 [2021-06-05 13:54:27,089 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 39.7ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:54:27,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-06-05 13:54:27,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 410. [2021-06-05 13:54:27,093 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 13:54:27,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1122 transitions. [2021-06-05 13:54:27,094 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1122 transitions. Word has length 17 [2021-06-05 13:54:27,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:27,094 INFO L482 AbstractCegarLoop]: Abstraction has 410 states and 1122 transitions. [2021-06-05 13:54:27,094 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 13:54:27,094 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1122 transitions. [2021-06-05 13:54:27,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:54:27,095 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:27,095 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:27,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 13:54:27,295 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:27,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:27,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1911162882, now seen corresponding path program 66 times [2021-06-05 13:54:27,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:27,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646998610] [2021-06-05 13:54:27,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:27,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:27,340 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 13:54:27,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:27,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646998610] [2021-06-05 13:54:27,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646998610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:27,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83817262] [2021-06-05 13:54:27,341 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 13:54:27,373 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:54:27,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:27,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:54:27,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:27,403 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 13:54:27,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83817262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:27,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:27,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 13:54:27,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51865511] [2021-06-05 13:54:27,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:54:27,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:27,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:54:27,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:54:27,404 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 13:54:27,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:27,499 INFO L93 Difference]: Finished difference Result 512 states and 1266 transitions. [2021-06-05 13:54:27,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:54:27,499 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 13:54:27,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:27,500 INFO L225 Difference]: With dead ends: 512 [2021-06-05 13:54:27,500 INFO L226 Difference]: Without dead ends: 510 [2021-06-05 13:54:27,500 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 68.7ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:54:27,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-06-05 13:54:27,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 410. [2021-06-05 13:54:27,506 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 13:54:27,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1117 transitions. [2021-06-05 13:54:27,507 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1117 transitions. Word has length 17 [2021-06-05 13:54:27,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:27,507 INFO L482 AbstractCegarLoop]: Abstraction has 410 states and 1117 transitions. [2021-06-05 13:54:27,507 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 13:54:27,507 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1117 transitions. [2021-06-05 13:54:27,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:54:27,508 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:27,508 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:27,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:27,731 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:27,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:27,731 INFO L82 PathProgramCache]: Analyzing trace with hash -894399418, now seen corresponding path program 67 times [2021-06-05 13:54:27,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:27,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922223443] [2021-06-05 13:54:27,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:27,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:27,788 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 13:54:27,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:27,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922223443] [2021-06-05 13:54:27,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922223443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:27,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343673973] [2021-06-05 13:54:27,788 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 13:54:27,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:27,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:54:27,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:27,865 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 13:54:27,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343673973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:27,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:27,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-06-05 13:54:27,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306613835] [2021-06-05 13:54:27,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:54:27,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:27,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:54:27,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:54:27,866 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 13:54:27,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:27,977 INFO L93 Difference]: Finished difference Result 518 states and 1269 transitions. [2021-06-05 13:54:27,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:54:27,977 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 13:54:27,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:27,978 INFO L225 Difference]: With dead ends: 518 [2021-06-05 13:54:27,978 INFO L226 Difference]: Without dead ends: 514 [2021-06-05 13:54:27,979 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 83.5ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:54:27,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-06-05 13:54:27,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 410. [2021-06-05 13:54:27,984 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 13:54:27,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1111 transitions. [2021-06-05 13:54:27,985 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1111 transitions. Word has length 17 [2021-06-05 13:54:27,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:27,985 INFO L482 AbstractCegarLoop]: Abstraction has 410 states and 1111 transitions. [2021-06-05 13:54:27,985 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 13:54:27,985 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1111 transitions. [2021-06-05 13:54:27,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:54:27,986 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:27,986 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:28,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-05 13:54:28,201 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:28,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:28,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1967484798, now seen corresponding path program 68 times [2021-06-05 13:54:28,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:28,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144708959] [2021-06-05 13:54:28,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:28,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:28,254 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 13:54:28,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:28,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144708959] [2021-06-05 13:54:28,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144708959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:28,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767427889] [2021-06-05 13:54:28,254 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 13:54:28,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:54:28,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:28,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:54:28,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:28,317 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 13:54:28,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767427889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:28,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:28,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-05 13:54:28,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789592489] [2021-06-05 13:54:28,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:54:28,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:28,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:54:28,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:54:28,318 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 13:54:28,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:28,442 INFO L93 Difference]: Finished difference Result 523 states and 1270 transitions. [2021-06-05 13:54:28,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:54:28,442 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 13:54:28,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:28,443 INFO L225 Difference]: With dead ends: 523 [2021-06-05 13:54:28,443 INFO L226 Difference]: Without dead ends: 517 [2021-06-05 13:54:28,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 91.8ms TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:54:28,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-06-05 13:54:28,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 411. [2021-06-05 13:54:28,449 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 13:54:28,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1107 transitions. [2021-06-05 13:54:28,450 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1107 transitions. Word has length 17 [2021-06-05 13:54:28,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:28,450 INFO L482 AbstractCegarLoop]: Abstraction has 411 states and 1107 transitions. [2021-06-05 13:54:28,450 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 13:54:28,450 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1107 transitions. [2021-06-05 13:54:28,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:54:28,451 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:28,451 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:28,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:28,674 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:28,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:28,674 INFO L82 PathProgramCache]: Analyzing trace with hash -873393210, now seen corresponding path program 69 times [2021-06-05 13:54:28,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:28,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283261498] [2021-06-05 13:54:28,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:28,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:28,727 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 13:54:28,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:28,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283261498] [2021-06-05 13:54:28,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283261498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:28,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443580527] [2021-06-05 13:54:28,727 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 13:54:28,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:54:28,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:28,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:54:28,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:28,792 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 13:54:28,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443580527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:28,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:28,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 13:54:28,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955355789] [2021-06-05 13:54:28,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:54:28,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:28,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:54:28,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:54:28,793 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 13:54:28,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:28,906 INFO L93 Difference]: Finished difference Result 574 states and 1445 transitions. [2021-06-05 13:54:28,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:54:28,906 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 13:54:28,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:28,907 INFO L225 Difference]: With dead ends: 574 [2021-06-05 13:54:28,907 INFO L226 Difference]: Without dead ends: 566 [2021-06-05 13:54:28,907 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 106.4ms TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:54:28,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-06-05 13:54:28,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 420. [2021-06-05 13:54:28,944 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 13:54:28,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1123 transitions. [2021-06-05 13:54:28,944 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1123 transitions. Word has length 17 [2021-06-05 13:54:28,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:28,945 INFO L482 AbstractCegarLoop]: Abstraction has 420 states and 1123 transitions. [2021-06-05 13:54:28,945 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 13:54:28,945 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1123 transitions. [2021-06-05 13:54:28,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:54:28,945 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:28,945 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:29,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-05 13:54:29,161 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:29,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:29,161 INFO L82 PathProgramCache]: Analyzing trace with hash -416986994, now seen corresponding path program 70 times [2021-06-05 13:54:29,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:29,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001801291] [2021-06-05 13:54:29,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:29,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:29,217 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 13:54:29,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:29,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001801291] [2021-06-05 13:54:29,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001801291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:29,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115215349] [2021-06-05 13:54:29,218 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 13:54:29,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:54:29,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:29,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:54:29,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:29,289 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 13:54:29,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115215349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:29,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:29,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-05 13:54:29,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523724157] [2021-06-05 13:54:29,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:54:29,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:29,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:54:29,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:54:29,290 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 13:54:29,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:29,388 INFO L93 Difference]: Finished difference Result 565 states and 1384 transitions. [2021-06-05 13:54:29,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:54:29,388 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 13:54:29,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:29,389 INFO L225 Difference]: With dead ends: 565 [2021-06-05 13:54:29,389 INFO L226 Difference]: Without dead ends: 565 [2021-06-05 13:54:29,390 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 81.1ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:54:29,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-06-05 13:54:29,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 444. [2021-06-05 13:54:29,395 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 13:54:29,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 1207 transitions. [2021-06-05 13:54:29,396 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 1207 transitions. Word has length 17 [2021-06-05 13:54:29,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:29,396 INFO L482 AbstractCegarLoop]: Abstraction has 444 states and 1207 transitions. [2021-06-05 13:54:29,396 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 13:54:29,396 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 1207 transitions. [2021-06-05 13:54:29,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:54:29,397 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:29,397 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:29,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:29,620 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:29,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:29,620 INFO L82 PathProgramCache]: Analyzing trace with hash -302988914, now seen corresponding path program 71 times [2021-06-05 13:54:29,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:29,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34182828] [2021-06-05 13:54:29,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:29,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:29,675 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 13:54:29,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:29,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34182828] [2021-06-05 13:54:29,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34182828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:29,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273919501] [2021-06-05 13:54:29,676 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 13:54:29,699 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:54:29,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:29,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:54:29,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:29,757 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 13:54:29,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273919501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:29,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:29,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 13:54:29,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599051194] [2021-06-05 13:54:29,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:54:29,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:29,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:54:29,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:54:29,758 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 13:54:29,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:29,875 INFO L93 Difference]: Finished difference Result 566 states and 1444 transitions. [2021-06-05 13:54:29,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:54:29,876 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 13:54:29,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:29,877 INFO L225 Difference]: With dead ends: 566 [2021-06-05 13:54:29,877 INFO L226 Difference]: Without dead ends: 558 [2021-06-05 13:54:29,878 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 119.3ms TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:54:29,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-06-05 13:54:29,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 444. [2021-06-05 13:54:29,882 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 13:54:29,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 1205 transitions. [2021-06-05 13:54:29,883 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 1205 transitions. Word has length 17 [2021-06-05 13:54:29,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:29,884 INFO L482 AbstractCegarLoop]: Abstraction has 444 states and 1205 transitions. [2021-06-05 13:54:29,884 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 13:54:29,884 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 1205 transitions. [2021-06-05 13:54:29,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:54:29,885 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:29,885 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:30,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:30,101 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:30,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:30,101 INFO L82 PathProgramCache]: Analyzing trace with hash 2053009298, now seen corresponding path program 72 times [2021-06-05 13:54:30,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:30,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898067717] [2021-06-05 13:54:30,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:30,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:30,152 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 13:54:30,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:30,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898067717] [2021-06-05 13:54:30,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898067717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:30,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222119133] [2021-06-05 13:54:30,153 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 13:54:30,175 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:54:30,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:30,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:54:30,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:30,216 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 13:54:30,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222119133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:30,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:30,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 12 [2021-06-05 13:54:30,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182645678] [2021-06-05 13:54:30,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:54:30,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:30,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:54:30,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:54:30,217 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 13:54:30,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:30,285 INFO L93 Difference]: Finished difference Result 642 states and 1598 transitions. [2021-06-05 13:54:30,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:54:30,285 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 13:54:30,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:30,286 INFO L225 Difference]: With dead ends: 642 [2021-06-05 13:54:30,286 INFO L226 Difference]: Without dead ends: 642 [2021-06-05 13:54:30,286 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 66.5ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:54:30,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-06-05 13:54:30,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 497. [2021-06-05 13:54:30,291 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 13:54:30,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1383 transitions. [2021-06-05 13:54:30,291 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1383 transitions. Word has length 17 [2021-06-05 13:54:30,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:30,292 INFO L482 AbstractCegarLoop]: Abstraction has 497 states and 1383 transitions. [2021-06-05 13:54:30,292 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 13:54:30,292 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1383 transitions. [2021-06-05 13:54:30,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:54:30,292 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:30,292 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:30,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:30,493 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:30,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:30,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1214110000, now seen corresponding path program 73 times [2021-06-05 13:54:30,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:30,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865856048] [2021-06-05 13:54:30,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:30,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:30,547 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 13:54:30,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:30,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865856048] [2021-06-05 13:54:30,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865856048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:30,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902019382] [2021-06-05 13:54:30,547 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 13:54:30,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:30,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:54:30,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:30,615 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 13:54:30,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902019382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:30,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:30,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 11 [2021-06-05 13:54:30,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665098527] [2021-06-05 13:54:30,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:54:30,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:30,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:54:30,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:54:30,616 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 13:54:30,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:30,712 INFO L93 Difference]: Finished difference Result 618 states and 1566 transitions. [2021-06-05 13:54:30,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:54:30,712 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 13:54:30,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:30,713 INFO L225 Difference]: With dead ends: 618 [2021-06-05 13:54:30,713 INFO L226 Difference]: Without dead ends: 616 [2021-06-05 13:54:30,714 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 86.8ms TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:54:30,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-06-05 13:54:30,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 497. [2021-06-05 13:54:30,720 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 13:54:30,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1381 transitions. [2021-06-05 13:54:30,721 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1381 transitions. Word has length 17 [2021-06-05 13:54:30,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:30,721 INFO L482 AbstractCegarLoop]: Abstraction has 497 states and 1381 transitions. [2021-06-05 13:54:30,721 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 13:54:30,721 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1381 transitions. [2021-06-05 13:54:30,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:54:30,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:30,722 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:30,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-05 13:54:30,943 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:30,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:30,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1591452300, now seen corresponding path program 74 times [2021-06-05 13:54:30,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:30,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011776507] [2021-06-05 13:54:30,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:30,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:30,989 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 13:54:30,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:30,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011776507] [2021-06-05 13:54:30,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011776507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:30,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865102815] [2021-06-05 13:54:30,990 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 13:54:31,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:54:31,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:31,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:54:31,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:31,060 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 13:54:31,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865102815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:31,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:31,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 12 [2021-06-05 13:54:31,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856049929] [2021-06-05 13:54:31,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:54:31,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:31,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:54:31,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:54:31,061 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 13:54:31,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:31,167 INFO L93 Difference]: Finished difference Result 624 states and 1572 transitions. [2021-06-05 13:54:31,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:54:31,167 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 13:54:31,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:31,168 INFO L225 Difference]: With dead ends: 624 [2021-06-05 13:54:31,168 INFO L226 Difference]: Without dead ends: 620 [2021-06-05 13:54:31,168 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 104.3ms TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:54:31,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2021-06-05 13:54:31,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 502. [2021-06-05 13:54:31,173 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 13:54:31,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1396 transitions. [2021-06-05 13:54:31,174 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1396 transitions. Word has length 17 [2021-06-05 13:54:31,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:31,174 INFO L482 AbstractCegarLoop]: Abstraction has 502 states and 1396 transitions. [2021-06-05 13:54:31,174 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 13:54:31,174 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1396 transitions. [2021-06-05 13:54:31,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:54:31,175 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:31,175 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:31,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:31,389 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:31,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:31,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1630429616, now seen corresponding path program 75 times [2021-06-05 13:54:31,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:31,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570416479] [2021-06-05 13:54:31,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:31,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:31,447 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 13:54:31,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:31,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570416479] [2021-06-05 13:54:31,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570416479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:31,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457070080] [2021-06-05 13:54:31,448 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 13:54:31,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:54:31,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:31,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 13:54:31,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:31,523 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 13:54:31,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457070080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:31,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:31,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-06-05 13:54:31,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593643337] [2021-06-05 13:54:31,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:54:31,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:31,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:54:31,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:54:31,524 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 13:54:31,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:31,619 INFO L93 Difference]: Finished difference Result 723 states and 1870 transitions. [2021-06-05 13:54:31,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:54:31,620 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 13:54:31,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:31,621 INFO L225 Difference]: With dead ends: 723 [2021-06-05 13:54:31,621 INFO L226 Difference]: Without dead ends: 717 [2021-06-05 13:54:31,621 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 100.0ms TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:54:31,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-06-05 13:54:31,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 502. [2021-06-05 13:54:31,626 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 13:54:31,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1394 transitions. [2021-06-05 13:54:31,627 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1394 transitions. Word has length 17 [2021-06-05 13:54:31,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:31,627 INFO L482 AbstractCegarLoop]: Abstraction has 502 states and 1394 transitions. [2021-06-05 13:54:31,627 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 13:54:31,627 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1394 transitions. [2021-06-05 13:54:31,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:54:31,628 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:31,628 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:31,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-05 13:54:31,851 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:31,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:31,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1570446092, now seen corresponding path program 76 times [2021-06-05 13:54:31,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:31,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050533028] [2021-06-05 13:54:31,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:31,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:31,909 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 13:54:31,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:31,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050533028] [2021-06-05 13:54:31,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050533028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:31,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802600751] [2021-06-05 13:54:31,910 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 13:54:31,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:54:31,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:31,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:54:31,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:31,990 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 13:54:31,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802600751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:31,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:31,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 13:54:31,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080311441] [2021-06-05 13:54:31,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:54:31,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:31,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:54:31,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:54:31,991 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 13:54:32,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:32,108 INFO L93 Difference]: Finished difference Result 736 states and 1882 transitions. [2021-06-05 13:54:32,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:54:32,108 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 13:54:32,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:32,109 INFO L225 Difference]: With dead ends: 736 [2021-06-05 13:54:32,109 INFO L226 Difference]: Without dead ends: 728 [2021-06-05 13:54:32,110 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 124.6ms TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:54:32,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-06-05 13:54:32,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 506. [2021-06-05 13:54:32,116 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 13:54:32,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1404 transitions. [2021-06-05 13:54:32,117 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1404 transitions. Word has length 17 [2021-06-05 13:54:32,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:32,117 INFO L482 AbstractCegarLoop]: Abstraction has 506 states and 1404 transitions. [2021-06-05 13:54:32,117 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 13:54:32,117 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1404 transitions. [2021-06-05 13:54:32,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:54:32,118 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:32,118 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:32,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 13:54:32,339 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:32,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:32,340 INFO L82 PathProgramCache]: Analyzing trace with hash -2013345232, now seen corresponding path program 77 times [2021-06-05 13:54:32,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:32,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876347688] [2021-06-05 13:54:32,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:32,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:32,400 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 13:54:32,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:32,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876347688] [2021-06-05 13:54:32,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876347688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:32,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119976923] [2021-06-05 13:54:32,400 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 13:54:32,431 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:54:32,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:32,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 13:54:32,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:32,497 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 13:54:32,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119976923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:32,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:32,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 13:54:32,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265358227] [2021-06-05 13:54:32,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:54:32,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:32,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:54:32,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:54:32,498 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 13:54:32,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:32,617 INFO L93 Difference]: Finished difference Result 575 states and 1546 transitions. [2021-06-05 13:54:32,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:54:32,618 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 13:54:32,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:32,619 INFO L225 Difference]: With dead ends: 575 [2021-06-05 13:54:32,619 INFO L226 Difference]: Without dead ends: 570 [2021-06-05 13:54:32,619 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 146.0ms TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:54:32,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-06-05 13:54:32,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 506. [2021-06-05 13:54:32,626 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 13:54:32,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1403 transitions. [2021-06-05 13:54:32,627 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1403 transitions. Word has length 17 [2021-06-05 13:54:32,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:32,627 INFO L482 AbstractCegarLoop]: Abstraction has 506 states and 1403 transitions. [2021-06-05 13:54:32,627 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 13:54:32,628 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1403 transitions. [2021-06-05 13:54:32,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:54:32,628 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:32,629 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:32,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:32,851 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:32,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:32,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1740678897, now seen corresponding path program 78 times [2021-06-05 13:54:32,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:32,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984333968] [2021-06-05 13:54:32,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:32,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:32,894 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 13:54:32,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:32,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984333968] [2021-06-05 13:54:32,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984333968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:32,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813944125] [2021-06-05 13:54:32,895 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 13:54:32,924 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:54:32,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:32,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:54:32,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:33,093 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:54:33,093 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 13:54:33,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:54:33,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:54:33,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:54:33,255 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 13:54:33,259 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 13:54:33,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813944125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:33,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:33,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-06-05 13:54:33,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730475765] [2021-06-05 13:54:33,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:54:33,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:33,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:54:33,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:54:33,260 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 13:54:33,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:33,378 INFO L93 Difference]: Finished difference Result 610 states and 1596 transitions. [2021-06-05 13:54:33,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:54:33,379 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 13:54:33,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:33,380 INFO L225 Difference]: With dead ends: 610 [2021-06-05 13:54:33,380 INFO L226 Difference]: Without dead ends: 607 [2021-06-05 13:54:33,380 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 126.1ms TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:54:33,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-06-05 13:54:33,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 535. [2021-06-05 13:54:33,386 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 13:54:33,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 1491 transitions. [2021-06-05 13:54:33,387 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 1491 transitions. Word has length 18 [2021-06-05 13:54:33,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:33,387 INFO L482 AbstractCegarLoop]: Abstraction has 535 states and 1491 transitions. [2021-06-05 13:54:33,387 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 13:54:33,387 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 1491 transitions. [2021-06-05 13:54:33,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:54:33,388 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:33,388 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:33,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:33,597 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:33,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:33,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1612382321, now seen corresponding path program 79 times [2021-06-05 13:54:33,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:33,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504615242] [2021-06-05 13:54:33,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:33,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:33,641 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 13:54:33,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:33,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504615242] [2021-06-05 13:54:33,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504615242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:33,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991863944] [2021-06-05 13:54:33,642 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 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 13:54:33,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:33,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:54:33,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:33,871 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:54:33,871 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 13:54:34,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:54:34,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:54:34,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:54:34,170 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 13:54:34,177 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 13:54:34,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991863944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:34,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:34,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-06-05 13:54:34,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647228618] [2021-06-05 13:54:34,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:54:34,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:34,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:54:34,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:54:34,178 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 13:54:34,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:34,282 INFO L93 Difference]: Finished difference Result 674 states and 1772 transitions. [2021-06-05 13:54:34,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:54:34,282 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 13:54:34,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:34,284 INFO L225 Difference]: With dead ends: 674 [2021-06-05 13:54:34,284 INFO L226 Difference]: Without dead ends: 671 [2021-06-05 13:54:34,284 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 142.3ms TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:54:34,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-06-05 13:54:34,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 575. [2021-06-05 13:54:34,292 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 13:54:34,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1628 transitions. [2021-06-05 13:54:34,293 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1628 transitions. Word has length 18 [2021-06-05 13:54:34,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:34,293 INFO L482 AbstractCegarLoop]: Abstraction has 575 states and 1628 transitions. [2021-06-05 13:54:34,293 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 13:54:34,294 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1628 transitions. [2021-06-05 13:54:34,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:54:34,294 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:34,295 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:34,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:34,519 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:34,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:34,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1250571143, now seen corresponding path program 80 times [2021-06-05 13:54:34,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:34,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810892029] [2021-06-05 13:54:34,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:34,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:34,563 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 13:54:34,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:34,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810892029] [2021-06-05 13:54:34,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810892029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:34,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498014277] [2021-06-05 13:54:34,564 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 13:54:34,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:54:34,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:34,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:54:34,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:34,763 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:54:34,763 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 13:54:35,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:54:35,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:54:35,165 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:54:35,165 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 13:54:35,171 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 13:54:35,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498014277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:35,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:35,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-06-05 13:54:35,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494862650] [2021-06-05 13:54:35,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:54:35,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:35,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:54:35,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:54:35,172 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 13:54:35,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:35,289 INFO L93 Difference]: Finished difference Result 731 states and 1949 transitions. [2021-06-05 13:54:35,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:54:35,289 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 13:54:35,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:35,294 INFO L225 Difference]: With dead ends: 731 [2021-06-05 13:54:35,294 INFO L226 Difference]: Without dead ends: 728 [2021-06-05 13:54:35,294 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 125.3ms TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:54:35,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-06-05 13:54:35,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 616. [2021-06-05 13:54:35,302 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 13:54:35,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 1777 transitions. [2021-06-05 13:54:35,303 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 1777 transitions. Word has length 18 [2021-06-05 13:54:35,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:35,304 INFO L482 AbstractCegarLoop]: Abstraction has 616 states and 1777 transitions. [2021-06-05 13:54:35,304 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 13:54:35,304 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 1777 transitions. [2021-06-05 13:54:35,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:54:35,305 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:35,305 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:35,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-05 13:54:35,521 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:35,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:35,521 INFO L82 PathProgramCache]: Analyzing trace with hash -192184689, now seen corresponding path program 81 times [2021-06-05 13:54:35,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:35,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90570073] [2021-06-05 13:54:35,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:35,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:35,564 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 13:54:35,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:35,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90570073] [2021-06-05 13:54:35,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90570073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:35,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383616879] [2021-06-05 13:54:35,564 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 13:54:35,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:54:35,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:35,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:54:35,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:35,785 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:54:35,785 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 13:54:36,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:54:36,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:54:36,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:54:36,107 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 13:54:36,113 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 13:54:36,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383616879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:36,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:36,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-06-05 13:54:36,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059675906] [2021-06-05 13:54:36,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:54:36,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:36,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:54:36,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:54:36,114 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 13:54:36,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:36,276 INFO L93 Difference]: Finished difference Result 778 states and 2109 transitions. [2021-06-05 13:54:36,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:54:36,277 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 13:54:36,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:36,278 INFO L225 Difference]: With dead ends: 778 [2021-06-05 13:54:36,278 INFO L226 Difference]: Without dead ends: 775 [2021-06-05 13:54:36,278 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 134.6ms TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:54:36,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2021-06-05 13:54:36,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 659. [2021-06-05 13:54:36,286 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 13:54:36,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 1933 transitions. [2021-06-05 13:54:36,287 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 1933 transitions. Word has length 18 [2021-06-05 13:54:36,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:36,287 INFO L482 AbstractCegarLoop]: Abstraction has 659 states and 1933 transitions. [2021-06-05 13:54:36,287 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 13:54:36,288 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 1933 transitions. [2021-06-05 13:54:36,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:54:36,289 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:36,289 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:36,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2021-06-05 13:54:36,505 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:36,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:36,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1967942521, now seen corresponding path program 82 times [2021-06-05 13:54:36,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:36,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79533567] [2021-06-05 13:54:36,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:36,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:36,549 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 13:54:36,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:36,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79533567] [2021-06-05 13:54:36,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79533567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:36,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102127024] [2021-06-05 13:54:36,550 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 13:54:36,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:54:36,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:36,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:54:36,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:36,771 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:54:36,772 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 13:54:36,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:54:36,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:54:36,908 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:54:36,908 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 13:54:36,914 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 13:54:36,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102127024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:36,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:36,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-06-05 13:54:36,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533672722] [2021-06-05 13:54:36,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:54:36,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:36,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:54:36,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:54:36,917 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 13:54:37,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:37,043 INFO L93 Difference]: Finished difference Result 823 states and 2281 transitions. [2021-06-05 13:54:37,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:54:37,043 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 13:54:37,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:37,049 INFO L225 Difference]: With dead ends: 823 [2021-06-05 13:54:37,049 INFO L226 Difference]: Without dead ends: 820 [2021-06-05 13:54:37,049 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 147.2ms TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:54:37,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2021-06-05 13:54:37,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 714. [2021-06-05 13:54:37,061 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 13:54:37,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 2129 transitions. [2021-06-05 13:54:37,063 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 2129 transitions. Word has length 18 [2021-06-05 13:54:37,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:37,064 INFO L482 AbstractCegarLoop]: Abstraction has 714 states and 2129 transitions. [2021-06-05 13:54:37,064 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 13:54:37,064 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 2129 transitions. [2021-06-05 13:54:37,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:54:37,065 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:37,065 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:37,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:37,281 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:37,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:37,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1181860465, now seen corresponding path program 83 times [2021-06-05 13:54:37,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:37,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477912956] [2021-06-05 13:54:37,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:37,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:37,322 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 13:54:37,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:37,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477912956] [2021-06-05 13:54:37,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477912956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:37,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489871619] [2021-06-05 13:54:37,323 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 13:54:37,355 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:54:37,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:37,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:54:37,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:37,529 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:54:37,530 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 13:54:37,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:54:37,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:54:37,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:54:37,705 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 13:54:37,711 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 13:54:37,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489871619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:37,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:37,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-06-05 13:54:37,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146626006] [2021-06-05 13:54:37,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:54:37,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:37,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:54:37,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:54:37,712 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 13:54:37,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:37,881 INFO L93 Difference]: Finished difference Result 908 states and 2540 transitions. [2021-06-05 13:54:37,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:54:37,881 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 13:54:37,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:37,883 INFO L225 Difference]: With dead ends: 908 [2021-06-05 13:54:37,884 INFO L226 Difference]: Without dead ends: 905 [2021-06-05 13:54:37,884 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 128.8ms TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:54:37,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2021-06-05 13:54:37,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 800. [2021-06-05 13:54:37,896 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 13:54:37,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2397 transitions. [2021-06-05 13:54:37,897 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2397 transitions. Word has length 18 [2021-06-05 13:54:37,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:37,898 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 2397 transitions. [2021-06-05 13:54:37,898 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 13:54:37,898 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2397 transitions. [2021-06-05 13:54:37,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:54:37,899 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:37,899 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:38,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-06-05 13:54:38,113 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:38,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:38,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1711846791, now seen corresponding path program 84 times [2021-06-05 13:54:38,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:38,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854362088] [2021-06-05 13:54:38,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:38,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:38,156 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 13:54:38,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:38,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854362088] [2021-06-05 13:54:38,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854362088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:38,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315375853] [2021-06-05 13:54:38,157 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 13:54:38,234 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:54:38,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:38,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:54:38,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:38,399 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:54:38,400 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 13:54:38,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:54:38,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:54:38,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:54:38,572 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 13:54:38,579 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 13:54:38,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315375853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:38,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:38,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-06-05 13:54:38,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488416210] [2021-06-05 13:54:38,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:54:38,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:38,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:54:38,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:54:38,581 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 13:54:38,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:38,724 INFO L93 Difference]: Finished difference Result 974 states and 2756 transitions. [2021-06-05 13:54:38,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:54:38,724 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 13:54:38,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:38,726 INFO L225 Difference]: With dead ends: 974 [2021-06-05 13:54:38,726 INFO L226 Difference]: Without dead ends: 971 [2021-06-05 13:54:38,726 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 128.2ms TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:54:38,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2021-06-05 13:54:38,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 872. [2021-06-05 13:54:38,735 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 13:54:38,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2623 transitions. [2021-06-05 13:54:38,737 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2623 transitions. Word has length 18 [2021-06-05 13:54:38,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:38,737 INFO L482 AbstractCegarLoop]: Abstraction has 872 states and 2623 transitions. [2021-06-05 13:54:38,737 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 13:54:38,737 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2623 transitions. [2021-06-05 13:54:38,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:54:38,738 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:38,738 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:38,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:38,939 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:38,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:38,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1937782575, now seen corresponding path program 85 times [2021-06-05 13:54:38,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:38,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813554735] [2021-06-05 13:54:38,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:38,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:39,007 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 13:54:39,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:39,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813554735] [2021-06-05 13:54:39,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813554735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:39,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119671074] [2021-06-05 13:54:39,008 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 13:54:39,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:39,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:54:39,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:39,069 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 13:54:39,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119671074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:39,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:39,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 13:54:39,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731686548] [2021-06-05 13:54:39,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:54:39,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:39,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:54:39,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:54:39,070 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 13:54:39,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:39,206 INFO L93 Difference]: Finished difference Result 993 states and 2794 transitions. [2021-06-05 13:54:39,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:54:39,207 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 13:54:39,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:39,209 INFO L225 Difference]: With dead ends: 993 [2021-06-05 13:54:39,209 INFO L226 Difference]: Without dead ends: 993 [2021-06-05 13:54:39,209 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 131.9ms TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:54:39,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2021-06-05 13:54:39,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 868. [2021-06-05 13:54:39,220 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 13:54:39,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 2607 transitions. [2021-06-05 13:54:39,222 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 2607 transitions. Word has length 19 [2021-06-05 13:54:39,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:39,222 INFO L482 AbstractCegarLoop]: Abstraction has 868 states and 2607 transitions. [2021-06-05 13:54:39,222 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 13:54:39,222 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 2607 transitions. [2021-06-05 13:54:39,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:54:39,224 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:39,224 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:39,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable527 [2021-06-05 13:54:39,437 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:39,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:39,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1896600742, now seen corresponding path program 86 times [2021-06-05 13:54:39,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:39,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427803601] [2021-06-05 13:54:39,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:39,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:39,507 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 13:54:39,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:39,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427803601] [2021-06-05 13:54:39,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427803601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:39,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94985417] [2021-06-05 13:54:39,508 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 13:54:39,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:54:39,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:39,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:54:39,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:39,587 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 13:54:39,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94985417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:39,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:39,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 13:54:39,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147284593] [2021-06-05 13:54:39,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:54:39,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:39,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:54:39,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:54:39,588 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 13:54:39,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:39,803 INFO L93 Difference]: Finished difference Result 1076 states and 2933 transitions. [2021-06-05 13:54:39,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:54:39,803 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 13:54:39,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:39,805 INFO L225 Difference]: With dead ends: 1076 [2021-06-05 13:54:39,805 INFO L226 Difference]: Without dead ends: 1067 [2021-06-05 13:54:39,805 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 186.3ms TimeCoverageRelationStatistics Valid=237, Invalid=465, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:54:39,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-06-05 13:54:39,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 886. [2021-06-05 13:54:39,814 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 13:54:39,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 2650 transitions. [2021-06-05 13:54:39,816 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 2650 transitions. Word has length 19 [2021-06-05 13:54:39,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:39,816 INFO L482 AbstractCegarLoop]: Abstraction has 886 states and 2650 transitions. [2021-06-05 13:54:39,816 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 13:54:39,816 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 2650 transitions. [2021-06-05 13:54:39,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:54:39,817 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:39,817 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:40,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable528 [2021-06-05 13:54:40,018 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:40,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:40,018 INFO L82 PathProgramCache]: Analyzing trace with hash -483433455, now seen corresponding path program 87 times [2021-06-05 13:54:40,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:40,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177643512] [2021-06-05 13:54:40,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:40,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:40,071 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 13:54:40,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:40,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177643512] [2021-06-05 13:54:40,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177643512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:40,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747430814] [2021-06-05 13:54:40,072 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 13:54:40,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:54:40,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:40,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:54:40,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:40,142 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 13:54:40,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747430814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:40,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:40,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 13:54:40,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121892211] [2021-06-05 13:54:40,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:54:40,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:40,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:54:40,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:54:40,143 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 13:54:40,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:40,253 INFO L93 Difference]: Finished difference Result 917 states and 2693 transitions. [2021-06-05 13:54:40,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:54:40,253 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 13:54:40,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:40,254 INFO L225 Difference]: With dead ends: 917 [2021-06-05 13:54:40,254 INFO L226 Difference]: Without dead ends: 916 [2021-06-05 13:54:40,254 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 80.4ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:54:40,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2021-06-05 13:54:40,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 886. [2021-06-05 13:54:40,267 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 13:54:40,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 2648 transitions. [2021-06-05 13:54:40,269 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 2648 transitions. Word has length 19 [2021-06-05 13:54:40,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:40,269 INFO L482 AbstractCegarLoop]: Abstraction has 886 states and 2648 transitions. [2021-06-05 13:54:40,269 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 13:54:40,269 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 2648 transitions. [2021-06-05 13:54:40,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:54:40,270 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:40,271 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:40,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable529,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:40,490 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:40,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:40,491 INFO L82 PathProgramCache]: Analyzing trace with hash 433622898, now seen corresponding path program 88 times [2021-06-05 13:54:40,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:40,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506987566] [2021-06-05 13:54:40,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:40,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:40,536 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 13:54:40,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:40,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506987566] [2021-06-05 13:54:40,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506987566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:40,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867690636] [2021-06-05 13:54:40,536 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 13:54:40,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:54:40,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:40,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:54:40,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:40,616 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 13:54:40,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867690636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:40,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:40,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 13:54:40,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738500012] [2021-06-05 13:54:40,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:54:40,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:40,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:54:40,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:54:40,618 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 13:54:40,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:40,671 INFO L93 Difference]: Finished difference Result 1091 states and 2973 transitions. [2021-06-05 13:54:40,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:54:40,671 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 13:54:40,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:40,673 INFO L225 Difference]: With dead ends: 1091 [2021-06-05 13:54:40,673 INFO L226 Difference]: Without dead ends: 1091 [2021-06-05 13:54:40,673 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 45.8ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:54:40,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1091 states. [2021-06-05 13:54:40,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1091 to 869. [2021-06-05 13:54:40,685 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 13:54:40,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2583 transitions. [2021-06-05 13:54:40,686 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2583 transitions. Word has length 19 [2021-06-05 13:54:40,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:40,686 INFO L482 AbstractCegarLoop]: Abstraction has 869 states and 2583 transitions. [2021-06-05 13:54:40,687 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 13:54:40,687 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2583 transitions. [2021-06-05 13:54:40,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:54:40,688 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:40,688 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:40,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable530,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:40,905 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:40,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:40,905 INFO L82 PathProgramCache]: Analyzing trace with hash 634065319, now seen corresponding path program 89 times [2021-06-05 13:54:40,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:40,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814761785] [2021-06-05 13:54:40,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:40,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:40,946 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 13:54:40,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:40,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814761785] [2021-06-05 13:54:40,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814761785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:40,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069401474] [2021-06-05 13:54:40,947 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 13:54:40,972 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:54:40,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:40,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:54:40,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:41,011 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 13:54:41,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069401474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:41,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:41,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 13:54:41,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43327020] [2021-06-05 13:54:41,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:54:41,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:41,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:54:41,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:54:41,012 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 13:54:41,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:41,091 INFO L93 Difference]: Finished difference Result 1088 states and 2969 transitions. [2021-06-05 13:54:41,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:54:41,091 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 13:54:41,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:41,092 INFO L225 Difference]: With dead ends: 1088 [2021-06-05 13:54:41,092 INFO L226 Difference]: Without dead ends: 1088 [2021-06-05 13:54:41,092 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 63.4ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:54:41,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2021-06-05 13:54:41,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 899. [2021-06-05 13:54:41,101 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 13:54:41,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2680 transitions. [2021-06-05 13:54:41,103 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2680 transitions. Word has length 19 [2021-06-05 13:54:41,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:41,103 INFO L482 AbstractCegarLoop]: Abstraction has 899 states and 2680 transitions. [2021-06-05 13:54:41,103 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 13:54:41,103 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2680 transitions. [2021-06-05 13:54:41,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:54:41,105 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:41,105 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:41,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable531 [2021-06-05 13:54:41,321 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:41,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:41,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1578827302, now seen corresponding path program 90 times [2021-06-05 13:54:41,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:41,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948565875] [2021-06-05 13:54:41,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:41,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:41,366 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 13:54:41,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:41,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948565875] [2021-06-05 13:54:41,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948565875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:41,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597643698] [2021-06-05 13:54:41,367 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 13:54:41,391 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:54:41,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:41,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:54:41,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:41,431 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 13:54:41,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597643698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:41,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:41,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 13:54:41,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690471113] [2021-06-05 13:54:41,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:54:41,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:41,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:54:41,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:54:41,432 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 13:54:41,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:41,538 INFO L93 Difference]: Finished difference Result 1083 states and 2957 transitions. [2021-06-05 13:54:41,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:54:41,538 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 13:54:41,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:41,540 INFO L225 Difference]: With dead ends: 1083 [2021-06-05 13:54:41,540 INFO L226 Difference]: Without dead ends: 1081 [2021-06-05 13:54:41,540 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 75.5ms TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:54:41,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2021-06-05 13:54:41,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 907. [2021-06-05 13:54:41,550 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 13:54:41,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 2707 transitions. [2021-06-05 13:54:41,551 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 2707 transitions. Word has length 19 [2021-06-05 13:54:41,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:41,551 INFO L482 AbstractCegarLoop]: Abstraction has 907 states and 2707 transitions. [2021-06-05 13:54:41,551 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 13:54:41,551 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 2707 transitions. [2021-06-05 13:54:41,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:54:41,552 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:41,553 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:41,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-06-05 13:54:41,753 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:41,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:41,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1915447287, now seen corresponding path program 91 times [2021-06-05 13:54:41,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:41,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178440681] [2021-06-05 13:54:41,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:41,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:41,795 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 13:54:41,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:41,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178440681] [2021-06-05 13:54:41,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178440681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:41,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3198392] [2021-06-05 13:54:41,796 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 13:54:41,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:41,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:54:41,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:41,848 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 13:54:41,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3198392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:41,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:41,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 13:54:41,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615846827] [2021-06-05 13:54:41,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:54:41,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:41,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:54:41,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:54:41,849 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 13:54:41,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:41,961 INFO L93 Difference]: Finished difference Result 1039 states and 2898 transitions. [2021-06-05 13:54:41,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:54:41,961 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 13:54:41,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:41,963 INFO L225 Difference]: With dead ends: 1039 [2021-06-05 13:54:41,963 INFO L226 Difference]: Without dead ends: 1037 [2021-06-05 13:54:41,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 71.6ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:54:41,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2021-06-05 13:54:41,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 884. [2021-06-05 13:54:41,972 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 13:54:41,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 2627 transitions. [2021-06-05 13:54:41,973 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 2627 transitions. Word has length 19 [2021-06-05 13:54:41,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:41,973 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 2627 transitions. [2021-06-05 13:54:41,973 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 13:54:41,973 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 2627 transitions. [2021-06-05 13:54:41,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:54:41,974 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:41,974 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:42,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable533,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:42,175 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:42,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:42,175 INFO L82 PathProgramCache]: Analyzing trace with hash -998390934, now seen corresponding path program 92 times [2021-06-05 13:54:42,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:42,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661779565] [2021-06-05 13:54:42,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:42,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:42,227 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 13:54:42,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:42,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661779565] [2021-06-05 13:54:42,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661779565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:42,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367867936] [2021-06-05 13:54:42,228 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 13:54:42,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:54:42,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:42,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:54:42,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:42,306 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 13:54:42,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367867936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:42,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:42,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 13:54:42,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161504659] [2021-06-05 13:54:42,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:54:42,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:42,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:54:42,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:54:42,307 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 13:54:42,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:42,361 INFO L93 Difference]: Finished difference Result 1108 states and 2970 transitions. [2021-06-05 13:54:42,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:54:42,362 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 13:54:42,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:42,369 INFO L225 Difference]: With dead ends: 1108 [2021-06-05 13:54:42,369 INFO L226 Difference]: Without dead ends: 1108 [2021-06-05 13:54:42,369 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 46.7ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:54:42,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2021-06-05 13:54:42,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 887. [2021-06-05 13:54:42,381 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 13:54:42,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 2634 transitions. [2021-06-05 13:54:42,383 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 2634 transitions. Word has length 19 [2021-06-05 13:54:42,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:42,383 INFO L482 AbstractCegarLoop]: Abstraction has 887 states and 2634 transitions. [2021-06-05 13:54:42,383 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 13:54:42,383 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 2634 transitions. [2021-06-05 13:54:42,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:54:42,385 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:42,385 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:42,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable534 [2021-06-05 13:54:42,608 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:42,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:42,608 INFO L82 PathProgramCache]: Analyzing trace with hash -204833979, now seen corresponding path program 93 times [2021-06-05 13:54:42,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:42,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856183270] [2021-06-05 13:54:42,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:42,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:42,660 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 13:54:42,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:42,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856183270] [2021-06-05 13:54:42,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856183270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:42,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110836397] [2021-06-05 13:54:42,660 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 13:54:42,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:54:42,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:42,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 13:54:42,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:42,777 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 13:54:42,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110836397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:42,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:42,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-06-05 13:54:42,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964364895] [2021-06-05 13:54:42,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:54:42,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:42,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:54:42,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:54:42,778 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 13:54:43,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:43,315 INFO L93 Difference]: Finished difference Result 2007 states and 5647 transitions. [2021-06-05 13:54:43,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 13:54:43,315 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 13:54:43,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:43,317 INFO L225 Difference]: With dead ends: 2007 [2021-06-05 13:54:43,317 INFO L226 Difference]: Without dead ends: 1998 [2021-06-05 13:54:43,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 424.3ms TimeCoverageRelationStatistics Valid=356, Invalid=2836, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 13:54:43,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1998 states. [2021-06-05 13:54:43,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1998 to 1397. [2021-06-05 13:54:43,334 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 13:54:43,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 4091 transitions. [2021-06-05 13:54:43,336 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 4091 transitions. Word has length 19 [2021-06-05 13:54:43,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:43,336 INFO L482 AbstractCegarLoop]: Abstraction has 1397 states and 4091 transitions. [2021-06-05 13:54:43,336 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 13:54:43,337 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 4091 transitions. [2021-06-05 13:54:43,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:54:43,338 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:43,338 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:43,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable535,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:43,539 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:43,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:43,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1567529028, now seen corresponding path program 94 times [2021-06-05 13:54:43,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:43,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174215514] [2021-06-05 13:54:43,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:43,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:43,590 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 13:54:43,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:43,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174215514] [2021-06-05 13:54:43,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174215514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:43,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459044945] [2021-06-05 13:54:43,590 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 13:54:43,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:54:43,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:43,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:54:43,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:43,681 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 13:54:43,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459044945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:43,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:43,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 13:54:43,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807824752] [2021-06-05 13:54:43,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:54:43,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:43,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:54:43,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:54:43,683 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 13:54:43,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:43,751 INFO L93 Difference]: Finished difference Result 1816 states and 4866 transitions. [2021-06-05 13:54:43,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:54:43,751 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 13:54:43,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:43,753 INFO L225 Difference]: With dead ends: 1816 [2021-06-05 13:54:43,753 INFO L226 Difference]: Without dead ends: 1816 [2021-06-05 13:54:43,753 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 63.2ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:54:43,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1816 states. [2021-06-05 13:54:43,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1816 to 1363. [2021-06-05 13:54:43,769 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 13:54:43,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 3969 transitions. [2021-06-05 13:54:43,771 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 3969 transitions. Word has length 19 [2021-06-05 13:54:43,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:43,771 INFO L482 AbstractCegarLoop]: Abstraction has 1363 states and 3969 transitions. [2021-06-05 13:54:43,771 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 13:54:43,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 3969 transitions. [2021-06-05 13:54:43,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:54:43,773 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:43,773 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:43,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable536 [2021-06-05 13:54:43,973 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:43,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:43,974 INFO L82 PathProgramCache]: Analyzing trace with hash 136071470, now seen corresponding path program 95 times [2021-06-05 13:54:43,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:43,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360872737] [2021-06-05 13:54:43,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:43,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:44,027 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 13:54:44,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:44,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360872737] [2021-06-05 13:54:44,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360872737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:44,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191177483] [2021-06-05 13:54:44,028 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 13:54:44,052 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:54:44,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:44,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:54:44,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:44,085 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 13:54:44,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191177483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:44,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:44,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 13:54:44,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666904311] [2021-06-05 13:54:44,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:54:44,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:44,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:54:44,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:54:44,086 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 13:54:44,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:44,186 INFO L93 Difference]: Finished difference Result 1590 states and 4309 transitions. [2021-06-05 13:54:44,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:54:44,186 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 13:54:44,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:44,188 INFO L225 Difference]: With dead ends: 1590 [2021-06-05 13:54:44,188 INFO L226 Difference]: Without dead ends: 1588 [2021-06-05 13:54:44,188 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 68.6ms TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:54:44,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1588 states. [2021-06-05 13:54:44,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1588 to 1376. [2021-06-05 13:54:44,201 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 13:54:44,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1376 states to 1376 states and 4006 transitions. [2021-06-05 13:54:44,203 INFO L78 Accepts]: Start accepts. Automaton has 1376 states and 4006 transitions. Word has length 19 [2021-06-05 13:54:44,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:44,203 INFO L482 AbstractCegarLoop]: Abstraction has 1376 states and 4006 transitions. [2021-06-05 13:54:44,203 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 13:54:44,203 INFO L276 IsEmpty]: Start isEmpty. Operand 1376 states and 4006 transitions. [2021-06-05 13:54:44,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:54:44,205 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:44,205 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:44,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable537 [2021-06-05 13:54:44,409 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:44,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:44,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1853820530, now seen corresponding path program 96 times [2021-06-05 13:54:44,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:44,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617964683] [2021-06-05 13:54:44,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:44,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:44,459 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 13:54:44,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:44,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617964683] [2021-06-05 13:54:44,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617964683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:44,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578014960] [2021-06-05 13:54:44,460 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 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 13:54:44,484 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:54:44,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:44,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:54:44,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:44,517 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 13:54:44,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578014960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:44,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:44,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 13:54:44,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647670005] [2021-06-05 13:54:44,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:54:44,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:44,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:54:44,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:54:44,524 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 13:54:44,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:44,572 INFO L93 Difference]: Finished difference Result 1582 states and 4263 transitions. [2021-06-05 13:54:44,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:54:44,572 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 13:54:44,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:44,574 INFO L225 Difference]: With dead ends: 1582 [2021-06-05 13:54:44,574 INFO L226 Difference]: Without dead ends: 1582 [2021-06-05 13:54:44,574 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 39.2ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:54:44,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2021-06-05 13:54:44,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1360. [2021-06-05 13:54:44,587 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 13:54:44,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 3944 transitions. [2021-06-05 13:54:44,588 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 3944 transitions. Word has length 19 [2021-06-05 13:54:44,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:44,589 INFO L482 AbstractCegarLoop]: Abstraction has 1360 states and 3944 transitions. [2021-06-05 13:54:44,589 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 13:54:44,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 3944 transitions. [2021-06-05 13:54:44,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:54:44,590 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:44,590 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:44,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable538,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:44,791 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:44,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:44,791 INFO L82 PathProgramCache]: Analyzing trace with hash 124773196, now seen corresponding path program 97 times [2021-06-05 13:54:44,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:44,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241320418] [2021-06-05 13:54:44,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:44,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:44,840 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 13:54:44,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:44,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241320418] [2021-06-05 13:54:44,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241320418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:44,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033711099] [2021-06-05 13:54:44,840 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 13:54:44,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:44,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:54:44,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:44,899 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 13:54:44,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033711099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:44,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:44,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 13:54:44,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394248956] [2021-06-05 13:54:44,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:54:44,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:44,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:54:44,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:54:44,900 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 13:54:44,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:44,976 INFO L93 Difference]: Finished difference Result 1713 states and 4555 transitions. [2021-06-05 13:54:44,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:54:44,977 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 13:54:44,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:44,978 INFO L225 Difference]: With dead ends: 1713 [2021-06-05 13:54:44,978 INFO L226 Difference]: Without dead ends: 1713 [2021-06-05 13:54:44,978 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 57.4ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:54:44,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1713 states. [2021-06-05 13:54:44,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1713 to 1363. [2021-06-05 13:54:44,992 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 13:54:44,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 3953 transitions. [2021-06-05 13:54:44,994 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 3953 transitions. Word has length 19 [2021-06-05 13:54:44,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:44,994 INFO L482 AbstractCegarLoop]: Abstraction has 1363 states and 3953 transitions. [2021-06-05 13:54:44,994 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 13:54:44,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 3953 transitions. [2021-06-05 13:54:44,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:54:44,995 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:44,995 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:45,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable539,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:45,196 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:45,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:45,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1936086606, now seen corresponding path program 98 times [2021-06-05 13:54:45,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:45,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331124011] [2021-06-05 13:54:45,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:45,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:45,249 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 13:54:45,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:45,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331124011] [2021-06-05 13:54:45,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331124011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:45,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110619162] [2021-06-05 13:54:45,250 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 13:54:45,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:54:45,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:45,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:54:45,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:45,317 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 13:54:45,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110619162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:45,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:45,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 13:54:45,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746256729] [2021-06-05 13:54:45,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:54:45,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:45,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:54:45,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:54:45,318 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 13:54:45,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:45,419 INFO L93 Difference]: Finished difference Result 2155 states and 5922 transitions. [2021-06-05 13:54:45,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:54:45,420 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 13:54:45,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:45,422 INFO L225 Difference]: With dead ends: 2155 [2021-06-05 13:54:45,422 INFO L226 Difference]: Without dead ends: 2155 [2021-06-05 13:54:45,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 84.9ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:54:45,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2155 states. [2021-06-05 13:54:45,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2155 to 1651. [2021-06-05 13:54:45,467 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 13:54:45,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 4922 transitions. [2021-06-05 13:54:45,470 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 4922 transitions. Word has length 19 [2021-06-05 13:54:45,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:45,471 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 4922 transitions. [2021-06-05 13:54:45,471 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 13:54:45,471 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 4922 transitions. [2021-06-05 13:54:45,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:54:45,473 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:45,473 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:45,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable540 [2021-06-05 13:54:45,695 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:45,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:45,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1320949180, now seen corresponding path program 99 times [2021-06-05 13:54:45,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:45,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065006289] [2021-06-05 13:54:45,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:45,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:45,738 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 13:54:45,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:45,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065006289] [2021-06-05 13:54:45,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065006289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:45,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60641476] [2021-06-05 13:54:45,738 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 13:54:45,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:54:45,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:45,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:54:45,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:45,804 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 13:54:45,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60641476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:45,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:45,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 13:54:45,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285161065] [2021-06-05 13:54:45,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:54:45,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:45,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:54:45,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:54:45,806 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 13:54:45,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:45,921 INFO L93 Difference]: Finished difference Result 1877 states and 5329 transitions. [2021-06-05 13:54:45,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:54:45,921 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 13:54:45,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:45,924 INFO L225 Difference]: With dead ends: 1877 [2021-06-05 13:54:45,924 INFO L226 Difference]: Without dead ends: 1873 [2021-06-05 13:54:45,924 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 75.6ms TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:54:45,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1873 states. [2021-06-05 13:54:45,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1873 to 1703. [2021-06-05 13:54:45,946 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 13:54:45,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1703 states to 1703 states and 5099 transitions. [2021-06-05 13:54:45,949 INFO L78 Accepts]: Start accepts. Automaton has 1703 states and 5099 transitions. Word has length 19 [2021-06-05 13:54:45,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:45,949 INFO L482 AbstractCegarLoop]: Abstraction has 1703 states and 5099 transitions. [2021-06-05 13:54:45,950 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 13:54:45,950 INFO L276 IsEmpty]: Start isEmpty. Operand 1703 states and 5099 transitions. [2021-06-05 13:54:45,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:54:45,952 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:45,952 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:46,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable541 [2021-06-05 13:54:46,169 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:46,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:46,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1089469124, now seen corresponding path program 100 times [2021-06-05 13:54:46,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:46,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729007788] [2021-06-05 13:54:46,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:46,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:46,214 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 13:54:46,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:46,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729007788] [2021-06-05 13:54:46,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729007788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:46,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980718945] [2021-06-05 13:54:46,214 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 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 13:54:46,237 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:54:46,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:46,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:54:46,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:46,290 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 13:54:46,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980718945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:46,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:46,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 13:54:46,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342793497] [2021-06-05 13:54:46,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:54:46,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:46,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:54:46,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:54:46,292 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 13:54:46,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:46,381 INFO L93 Difference]: Finished difference Result 2270 states and 6309 transitions. [2021-06-05 13:54:46,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:54:46,381 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 13:54:46,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:46,383 INFO L225 Difference]: With dead ends: 2270 [2021-06-05 13:54:46,383 INFO L226 Difference]: Without dead ends: 2270 [2021-06-05 13:54:46,383 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 73.4ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:54:46,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2270 states. [2021-06-05 13:54:46,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2270 to 1409. [2021-06-05 13:54:46,398 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 13:54:46,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 4139 transitions. [2021-06-05 13:54:46,400 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 4139 transitions. Word has length 19 [2021-06-05 13:54:46,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:46,401 INFO L482 AbstractCegarLoop]: Abstraction has 1409 states and 4139 transitions. [2021-06-05 13:54:46,401 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 13:54:46,401 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 4139 transitions. [2021-06-05 13:54:46,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:54:46,402 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:46,402 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:46,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable542 [2021-06-05 13:54:46,603 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:46,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:46,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1639686362, now seen corresponding path program 101 times [2021-06-05 13:54:46,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:46,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359230444] [2021-06-05 13:54:46,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:46,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:46,645 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 13:54:46,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:46,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359230444] [2021-06-05 13:54:46,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359230444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:46,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626068034] [2021-06-05 13:54:46,646 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 13:54:46,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:54:46,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:46,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:54:46,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:46,701 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 13:54:46,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626068034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:46,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:46,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 13:54:46,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461049786] [2021-06-05 13:54:46,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:54:46,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:46,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:54:46,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:54:46,702 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 13:54:46,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:46,803 INFO L93 Difference]: Finished difference Result 1616 states and 4431 transitions. [2021-06-05 13:54:46,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:54:46,804 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 13:54:46,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:46,805 INFO L225 Difference]: With dead ends: 1616 [2021-06-05 13:54:46,805 INFO L226 Difference]: Without dead ends: 1612 [2021-06-05 13:54:46,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 72.7ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:54:46,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2021-06-05 13:54:46,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 1392. [2021-06-05 13:54:46,820 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 13:54:46,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 4073 transitions. [2021-06-05 13:54:46,822 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 4073 transitions. Word has length 19 [2021-06-05 13:54:46,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:46,822 INFO L482 AbstractCegarLoop]: Abstraction has 1392 states and 4073 transitions. [2021-06-05 13:54:46,822 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 13:54:46,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 4073 transitions. [2021-06-05 13:54:46,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:54:46,823 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:46,824 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:47,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable543 [2021-06-05 13:54:47,024 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:47,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:47,024 INFO L82 PathProgramCache]: Analyzing trace with hash 78062698, now seen corresponding path program 102 times [2021-06-05 13:54:47,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:47,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059854825] [2021-06-05 13:54:47,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:47,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:47,064 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 13:54:47,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:47,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059854825] [2021-06-05 13:54:47,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059854825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:47,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738607659] [2021-06-05 13:54:47,065 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 13:54:47,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:54:47,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:47,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:54:47,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:47,122 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 13:54:47,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738607659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:47,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:47,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 13:54:47,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772168980] [2021-06-05 13:54:47,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:54:47,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:47,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:54:47,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:54:47,123 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 13:54:47,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:47,189 INFO L93 Difference]: Finished difference Result 1671 states and 4517 transitions. [2021-06-05 13:54:47,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:54:47,189 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 13:54:47,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:47,190 INFO L225 Difference]: With dead ends: 1671 [2021-06-05 13:54:47,190 INFO L226 Difference]: Without dead ends: 1671 [2021-06-05 13:54:47,191 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 42.9ms TimeCoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:54:47,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1671 states. [2021-06-05 13:54:47,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1671 to 1393. [2021-06-05 13:54:47,203 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 13:54:47,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 4069 transitions. [2021-06-05 13:54:47,205 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 4069 transitions. Word has length 19 [2021-06-05 13:54:47,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:47,205 INFO L482 AbstractCegarLoop]: Abstraction has 1393 states and 4069 transitions. [2021-06-05 13:54:47,205 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 13:54:47,205 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 4069 transitions. [2021-06-05 13:54:47,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:54:47,206 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:47,206 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:47,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable544 [2021-06-05 13:54:47,407 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:47,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:47,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1650984636, now seen corresponding path program 103 times [2021-06-05 13:54:47,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:47,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505261514] [2021-06-05 13:54:47,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:47,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:47,453 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 13:54:47,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:47,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505261514] [2021-06-05 13:54:47,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505261514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:47,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742888799] [2021-06-05 13:54:47,453 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 13:54:47,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:47,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:54:47,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:47,534 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 13:54:47,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742888799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:47,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:47,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 13:54:47,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305517051] [2021-06-05 13:54:47,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:54:47,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:47,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:54:47,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:54:47,535 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 13:54:47,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:47,601 INFO L93 Difference]: Finished difference Result 1578 states and 4284 transitions. [2021-06-05 13:54:47,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:54:47,601 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 13:54:47,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:47,603 INFO L225 Difference]: With dead ends: 1578 [2021-06-05 13:54:47,603 INFO L226 Difference]: Without dead ends: 1578 [2021-06-05 13:54:47,603 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 56.5ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:54:47,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2021-06-05 13:54:47,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 1355. [2021-06-05 13:54:47,620 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 13:54:47,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1355 states to 1355 states and 3938 transitions. [2021-06-05 13:54:47,622 INFO L78 Accepts]: Start accepts. Automaton has 1355 states and 3938 transitions. Word has length 19 [2021-06-05 13:54:47,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:47,623 INFO L482 AbstractCegarLoop]: Abstraction has 1355 states and 3938 transitions. [2021-06-05 13:54:47,623 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 13:54:47,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1355 states and 3938 transitions. [2021-06-05 13:54:47,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:54:47,624 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:47,624 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:47,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable545 [2021-06-05 13:54:47,847 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:47,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:47,848 INFO L82 PathProgramCache]: Analyzing trace with hash 583122858, now seen corresponding path program 104 times [2021-06-05 13:54:47,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:47,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478887165] [2021-06-05 13:54:47,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:47,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:47,898 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 13:54:47,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:47,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478887165] [2021-06-05 13:54:47,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478887165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:47,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564306709] [2021-06-05 13:54:47,899 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 13:54:47,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:54:47,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:47,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:54:47,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:47,971 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 13:54:47,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564306709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:47,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:47,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 13:54:47,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332088976] [2021-06-05 13:54:47,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:54:47,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:47,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:54:47,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:54:47,972 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 13:54:48,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:48,072 INFO L93 Difference]: Finished difference Result 1698 states and 4556 transitions. [2021-06-05 13:54:48,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:54:48,073 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 13:54:48,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:48,075 INFO L225 Difference]: With dead ends: 1698 [2021-06-05 13:54:48,075 INFO L226 Difference]: Without dead ends: 1698 [2021-06-05 13:54:48,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 82.3ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:54:48,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2021-06-05 13:54:48,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 1299. [2021-06-05 13:54:48,091 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 13:54:48,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 3741 transitions. [2021-06-05 13:54:48,093 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 3741 transitions. Word has length 19 [2021-06-05 13:54:48,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:48,094 INFO L482 AbstractCegarLoop]: Abstraction has 1299 states and 3741 transitions. [2021-06-05 13:54:48,094 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 13:54:48,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 3741 transitions. [2021-06-05 13:54:48,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:54:48,095 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:48,095 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:48,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable546 [2021-06-05 13:54:48,314 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:48,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:48,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1120978436, now seen corresponding path program 105 times [2021-06-05 13:54:48,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:48,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672962165] [2021-06-05 13:54:48,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:48,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:48,369 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 13:54:48,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:48,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672962165] [2021-06-05 13:54:48,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672962165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:48,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785082432] [2021-06-05 13:54:48,370 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 13:54:48,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:54:48,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:48,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:54:48,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:48,437 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 13:54:48,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785082432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:48,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:48,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 13:54:48,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114947532] [2021-06-05 13:54:48,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:54:48,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:48,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:54:48,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:54:48,438 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 13:54:48,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:48,569 INFO L93 Difference]: Finished difference Result 2138 states and 5768 transitions. [2021-06-05 13:54:48,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:54:48,569 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 13:54:48,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:48,571 INFO L225 Difference]: With dead ends: 2138 [2021-06-05 13:54:48,571 INFO L226 Difference]: Without dead ends: 2138 [2021-06-05 13:54:48,572 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 109.1ms TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:54:48,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2138 states. [2021-06-05 13:54:48,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2138 to 1510. [2021-06-05 13:54:48,588 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 13:54:48,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 4455 transitions. [2021-06-05 13:54:48,590 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 4455 transitions. Word has length 19 [2021-06-05 13:54:48,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:48,590 INFO L482 AbstractCegarLoop]: Abstraction has 1510 states and 4455 transitions. [2021-06-05 13:54:48,591 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 13:54:48,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 4455 transitions. [2021-06-05 13:54:48,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:54:48,592 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:48,592 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:48,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable547,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:48,793 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:48,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:48,793 INFO L82 PathProgramCache]: Analyzing trace with hash 423925554, now seen corresponding path program 106 times [2021-06-05 13:54:48,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:48,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252102099] [2021-06-05 13:54:48,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:48,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:48,845 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 13:54:48,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:48,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252102099] [2021-06-05 13:54:48,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252102099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:48,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832817600] [2021-06-05 13:54:48,846 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 13:54:48,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:54:48,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:48,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:54:48,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:48,909 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 13:54:48,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832817600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:48,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:48,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:54:48,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947540670] [2021-06-05 13:54:48,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:54:48,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:48,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:54:48,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:54:48,910 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 13:54:49,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:49,065 INFO L93 Difference]: Finished difference Result 1994 states and 5446 transitions. [2021-06-05 13:54:49,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:54:49,066 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 13:54:49,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:49,068 INFO L225 Difference]: With dead ends: 1994 [2021-06-05 13:54:49,068 INFO L226 Difference]: Without dead ends: 1994 [2021-06-05 13:54:49,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 107.8ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:54:49,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1994 states. [2021-06-05 13:54:49,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1994 to 1216. [2021-06-05 13:54:49,083 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 13:54:49,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 3513 transitions. [2021-06-05 13:54:49,085 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 3513 transitions. Word has length 19 [2021-06-05 13:54:49,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:49,085 INFO L482 AbstractCegarLoop]: Abstraction has 1216 states and 3513 transitions. [2021-06-05 13:54:49,085 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 13:54:49,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 3513 transitions. [2021-06-05 13:54:49,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:54:49,086 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:49,086 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:49,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:49,287 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:49,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:49,287 INFO L82 PathProgramCache]: Analyzing trace with hash -853604306, now seen corresponding path program 107 times [2021-06-05 13:54:49,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:49,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442145728] [2021-06-05 13:54:49,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:49,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:49,333 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 13:54:49,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:49,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442145728] [2021-06-05 13:54:49,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442145728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:49,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548089240] [2021-06-05 13:54:49,333 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 13:54:49,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:54:49,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:49,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:54:49,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:49,390 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 13:54:49,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548089240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:49,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:49,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 13:54:49,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28603202] [2021-06-05 13:54:49,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:54:49,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:49,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:54:49,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:54:49,391 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 13:54:49,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:49,497 INFO L93 Difference]: Finished difference Result 1394 states and 3767 transitions. [2021-06-05 13:54:49,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:54:49,498 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 13:54:49,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:49,499 INFO L225 Difference]: With dead ends: 1394 [2021-06-05 13:54:49,499 INFO L226 Difference]: Without dead ends: 1390 [2021-06-05 13:54:49,499 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 75.9ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:54:49,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2021-06-05 13:54:49,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 1183. [2021-06-05 13:54:49,511 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 13:54:49,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 3393 transitions. [2021-06-05 13:54:49,512 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 3393 transitions. Word has length 19 [2021-06-05 13:54:49,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:49,512 INFO L482 AbstractCegarLoop]: Abstraction has 1183 states and 3393 transitions. [2021-06-05 13:54:49,513 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 13:54:49,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 3393 transitions. [2021-06-05 13:54:49,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:54:49,514 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:49,514 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:49,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable549,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:49,714 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:49,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:49,715 INFO L82 PathProgramCache]: Analyzing trace with hash 864144754, now seen corresponding path program 108 times [2021-06-05 13:54:49,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:49,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695320276] [2021-06-05 13:54:49,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:49,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:49,758 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 13:54:49,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:49,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695320276] [2021-06-05 13:54:49,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695320276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:49,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706004944] [2021-06-05 13:54:49,758 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 13:54:49,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:54:49,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:49,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:54:49,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:49,815 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 13:54:49,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706004944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:49,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:49,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 13:54:49,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750693910] [2021-06-05 13:54:49,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:54:49,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:49,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:54:49,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:54:49,816 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 13:54:49,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:49,873 INFO L93 Difference]: Finished difference Result 1453 states and 3839 transitions. [2021-06-05 13:54:49,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:54:49,873 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 13:54:49,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:49,875 INFO L225 Difference]: With dead ends: 1453 [2021-06-05 13:54:49,875 INFO L226 Difference]: Without dead ends: 1453 [2021-06-05 13:54:49,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 49.3ms TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:54:49,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1453 states. [2021-06-05 13:54:49,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1453 to 1189. [2021-06-05 13:54:49,887 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 13:54:49,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 3407 transitions. [2021-06-05 13:54:49,889 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 3407 transitions. Word has length 19 [2021-06-05 13:54:49,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:49,889 INFO L482 AbstractCegarLoop]: Abstraction has 1189 states and 3407 transitions. [2021-06-05 13:54:49,890 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 13:54:49,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 3407 transitions. [2021-06-05 13:54:49,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:54:49,891 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:49,891 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:50,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:50,091 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:50,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:50,092 INFO L82 PathProgramCache]: Analyzing trace with hash -864902580, now seen corresponding path program 109 times [2021-06-05 13:54:50,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:50,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107524514] [2021-06-05 13:54:50,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:50,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:50,144 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 13:54:50,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:50,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107524514] [2021-06-05 13:54:50,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107524514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:50,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659716126] [2021-06-05 13:54:50,145 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 13:54:50,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:50,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:54:50,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:50,202 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 13:54:50,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659716126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:50,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:50,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 13:54:50,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314978625] [2021-06-05 13:54:50,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:54:50,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:50,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:54:50,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:54:50,203 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 13:54:50,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:50,270 INFO L93 Difference]: Finished difference Result 1449 states and 3831 transitions. [2021-06-05 13:54:50,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:54:50,270 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 13:54:50,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:50,272 INFO L225 Difference]: With dead ends: 1449 [2021-06-05 13:54:50,272 INFO L226 Difference]: Without dead ends: 1449 [2021-06-05 13:54:50,272 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 61.2ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:54:50,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1449 states. [2021-06-05 13:54:50,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1449 to 1136. [2021-06-05 13:54:50,283 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 13:54:50,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 3230 transitions. [2021-06-05 13:54:50,285 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 3230 transitions. Word has length 19 [2021-06-05 13:54:50,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:50,285 INFO L482 AbstractCegarLoop]: Abstraction has 1136 states and 3230 transitions. [2021-06-05 13:54:50,285 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 13:54:50,285 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 3230 transitions. [2021-06-05 13:54:50,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:54:50,286 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:50,286 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:50,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable551 [2021-06-05 13:54:50,487 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:50,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:50,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1369204914, now seen corresponding path program 110 times [2021-06-05 13:54:50,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:50,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650151087] [2021-06-05 13:54:50,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:50,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:50,541 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 13:54:50,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:50,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650151087] [2021-06-05 13:54:50,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650151087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:50,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634326535] [2021-06-05 13:54:50,541 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 13:54:50,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:54:50,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:50,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:54:50,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:50,643 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 13:54:50,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634326535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:50,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:50,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 13:54:50,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427849806] [2021-06-05 13:54:50,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:54:50,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:50,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:54:50,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:54:50,644 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 13:54:50,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:50,698 INFO L93 Difference]: Finished difference Result 1670 states and 4515 transitions. [2021-06-05 13:54:50,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:54:50,698 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 13:54:50,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:50,700 INFO L225 Difference]: With dead ends: 1670 [2021-06-05 13:54:50,700 INFO L226 Difference]: Without dead ends: 1670 [2021-06-05 13:54:50,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 61.3ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:54:50,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2021-06-05 13:54:50,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 1470. [2021-06-05 13:54:50,719 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 13:54:50,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1470 states to 1470 states and 4243 transitions. [2021-06-05 13:54:50,722 INFO L78 Accepts]: Start accepts. Automaton has 1470 states and 4243 transitions. Word has length 19 [2021-06-05 13:54:50,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:50,722 INFO L482 AbstractCegarLoop]: Abstraction has 1470 states and 4243 transitions. [2021-06-05 13:54:50,722 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 13:54:50,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1470 states and 4243 transitions. [2021-06-05 13:54:50,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:54:50,724 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:50,724 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:50,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable552 [2021-06-05 13:54:50,947 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:50,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:50,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1907060492, now seen corresponding path program 111 times [2021-06-05 13:54:50,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:50,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124880643] [2021-06-05 13:54:50,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:50,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:51,002 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 13:54:51,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:51,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124880643] [2021-06-05 13:54:51,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124880643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:51,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619911703] [2021-06-05 13:54:51,002 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 13:54:51,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:54:51,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:51,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:54:51,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:51,059 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 13:54:51,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619911703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:51,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:51,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:54:51,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78138067] [2021-06-05 13:54:51,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:54:51,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:51,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:54:51,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:54:51,060 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 13:54:51,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:51,157 INFO L93 Difference]: Finished difference Result 1718 states and 4617 transitions. [2021-06-05 13:54:51,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:54:51,157 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 13:54:51,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:51,159 INFO L225 Difference]: With dead ends: 1718 [2021-06-05 13:54:51,159 INFO L226 Difference]: Without dead ends: 1718 [2021-06-05 13:54:51,159 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 89.8ms TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:54:51,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2021-06-05 13:54:51,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 1404. [2021-06-05 13:54:51,172 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 13:54:51,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 4040 transitions. [2021-06-05 13:54:51,174 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 4040 transitions. Word has length 19 [2021-06-05 13:54:51,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:51,174 INFO L482 AbstractCegarLoop]: Abstraction has 1404 states and 4040 transitions. [2021-06-05 13:54:51,174 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 13:54:51,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 4040 transitions. [2021-06-05 13:54:51,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:54:51,175 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:51,175 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:51,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable553 [2021-06-05 13:54:51,381 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:51,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:51,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1400714226, now seen corresponding path program 112 times [2021-06-05 13:54:51,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:51,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980342094] [2021-06-05 13:54:51,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:51,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:51,433 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 13:54:51,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:51,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980342094] [2021-06-05 13:54:51,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980342094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:51,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901336661] [2021-06-05 13:54:51,433 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 13:54:51,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:54:51,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:51,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:54:51,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:51,510 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 13:54:51,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901336661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:51,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:51,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:54:51,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049103885] [2021-06-05 13:54:51,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:54:51,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:51,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:54:51,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:54:51,511 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 13:54:51,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:51,665 INFO L93 Difference]: Finished difference Result 1961 states and 5383 transitions. [2021-06-05 13:54:51,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:54:51,665 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 13:54:51,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:51,667 INFO L225 Difference]: With dead ends: 1961 [2021-06-05 13:54:51,667 INFO L226 Difference]: Without dead ends: 1961 [2021-06-05 13:54:51,667 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 132.7ms TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:54:51,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2021-06-05 13:54:51,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1643. [2021-06-05 13:54:51,683 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 13:54:51,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 4817 transitions. [2021-06-05 13:54:51,686 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 4817 transitions. Word has length 19 [2021-06-05 13:54:51,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:51,686 INFO L482 AbstractCegarLoop]: Abstraction has 1643 states and 4817 transitions. [2021-06-05 13:54:51,686 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 13:54:51,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 4817 transitions. [2021-06-05 13:54:51,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:54:51,688 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:51,688 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:51,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable554 [2021-06-05 13:54:51,888 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:51,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:51,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1043037158, now seen corresponding path program 113 times [2021-06-05 13:54:51,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:51,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544587394] [2021-06-05 13:54:51,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:51,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:51,937 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 13:54:51,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:51,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544587394] [2021-06-05 13:54:51,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544587394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:51,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443038053] [2021-06-05 13:54:51,938 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 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 13:54:51,962 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:54:51,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:51,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:54:51,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:51,989 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 13:54:51,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443038053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:51,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:51,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 13:54:51,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505131214] [2021-06-05 13:54:51,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:54:51,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:51,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:54:51,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:54:51,990 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 13:54:52,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:52,132 INFO L93 Difference]: Finished difference Result 1862 states and 5178 transitions. [2021-06-05 13:54:52,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:54:52,132 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 13:54:52,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:52,134 INFO L225 Difference]: With dead ends: 1862 [2021-06-05 13:54:52,134 INFO L226 Difference]: Without dead ends: 1856 [2021-06-05 13:54:52,134 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 101.0ms TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:54:52,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1856 states. [2021-06-05 13:54:52,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1856 to 1674. [2021-06-05 13:54:52,149 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 13:54:52,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 4921 transitions. [2021-06-05 13:54:52,151 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 4921 transitions. Word has length 19 [2021-06-05 13:54:52,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:52,152 INFO L482 AbstractCegarLoop]: Abstraction has 1674 states and 4921 transitions. [2021-06-05 13:54:52,152 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 13:54:52,152 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 4921 transitions. [2021-06-05 13:54:52,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:54:52,153 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:52,153 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:52,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable555,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:52,354 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:52,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:52,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1871868906, now seen corresponding path program 114 times [2021-06-05 13:54:52,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:52,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823804073] [2021-06-05 13:54:52,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:52,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:52,411 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 13:54:52,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:52,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823804073] [2021-06-05 13:54:52,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823804073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:52,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460243152] [2021-06-05 13:54:52,411 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 13:54:52,441 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:54:52,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:52,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:54:52,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:52,478 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 13:54:52,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460243152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:52,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:52,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 13:54:52,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674433727] [2021-06-05 13:54:52,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:54:52,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:52,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:54:52,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:54:52,480 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 13:54:52,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:52,545 INFO L93 Difference]: Finished difference Result 1907 states and 5367 transitions. [2021-06-05 13:54:52,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:54:52,545 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 13:54:52,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:52,548 INFO L225 Difference]: With dead ends: 1907 [2021-06-05 13:54:52,548 INFO L226 Difference]: Without dead ends: 1907 [2021-06-05 13:54:52,548 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 65.3ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:54:52,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1907 states. [2021-06-05 13:54:52,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1907 to 1673. [2021-06-05 13:54:52,572 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 13:54:52,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 4902 transitions. [2021-06-05 13:54:52,576 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 4902 transitions. Word has length 19 [2021-06-05 13:54:52,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:52,576 INFO L482 AbstractCegarLoop]: Abstraction has 1673 states and 4902 transitions. [2021-06-05 13:54:52,576 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 13:54:52,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 4902 transitions. [2021-06-05 13:54:52,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:54:52,578 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:52,579 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:52,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable556 [2021-06-05 13:54:52,800 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:52,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:52,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1885242812, now seen corresponding path program 115 times [2021-06-05 13:54:52,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:52,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666347186] [2021-06-05 13:54:52,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:52,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:52,862 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 13:54:52,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:52,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666347186] [2021-06-05 13:54:52,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666347186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:52,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356297784] [2021-06-05 13:54:52,862 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 13:54:52,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:52,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:54:52,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:52,930 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 13:54:52,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356297784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:52,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:52,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:54:52,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784015075] [2021-06-05 13:54:52,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:54:52,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:52,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:54:52,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:54:52,931 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 13:54:53,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:53,045 INFO L93 Difference]: Finished difference Result 1965 states and 5492 transitions. [2021-06-05 13:54:53,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:54:53,045 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 13:54:53,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:53,047 INFO L225 Difference]: With dead ends: 1965 [2021-06-05 13:54:53,047 INFO L226 Difference]: Without dead ends: 1965 [2021-06-05 13:54:53,047 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 104.7ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:54:53,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1965 states. [2021-06-05 13:54:53,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1965 to 1412. [2021-06-05 13:54:53,066 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 13:54:53,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 4076 transitions. [2021-06-05 13:54:53,068 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 4076 transitions. Word has length 19 [2021-06-05 13:54:53,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:53,068 INFO L482 AbstractCegarLoop]: Abstraction has 1412 states and 4076 transitions. [2021-06-05 13:54:53,068 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 13:54:53,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 4076 transitions. [2021-06-05 13:54:53,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:54:53,069 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:53,069 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:53,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable557,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:53,270 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:53,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:53,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1903378218, now seen corresponding path program 116 times [2021-06-05 13:54:53,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:53,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135725237] [2021-06-05 13:54:53,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:53,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:53,328 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 13:54:53,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:53,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135725237] [2021-06-05 13:54:53,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135725237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:53,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186705873] [2021-06-05 13:54:53,329 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 13:54:53,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:54:53,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:53,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:54:53,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:53,387 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 13:54:53,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186705873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:53,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:53,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:54:53,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222680516] [2021-06-05 13:54:53,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:54:53,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:53,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:54:53,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:54:53,388 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 13:54:53,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:53,548 INFO L93 Difference]: Finished difference Result 1975 states and 5352 transitions. [2021-06-05 13:54:53,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:54:53,548 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 13:54:53,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:53,550 INFO L225 Difference]: With dead ends: 1975 [2021-06-05 13:54:53,550 INFO L226 Difference]: Without dead ends: 1975 [2021-06-05 13:54:53,550 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 137.4ms TimeCoverageRelationStatistics Valid=220, Invalid=430, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:54:53,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2021-06-05 13:54:53,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 1385. [2021-06-05 13:54:53,565 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 13:54:53,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1385 states to 1385 states and 4015 transitions. [2021-06-05 13:54:53,567 INFO L78 Accepts]: Start accepts. Automaton has 1385 states and 4015 transitions. Word has length 19 [2021-06-05 13:54:53,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:53,567 INFO L482 AbstractCegarLoop]: Abstraction has 1385 states and 4015 transitions. [2021-06-05 13:54:53,567 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 13:54:53,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1385 states and 4015 transitions. [2021-06-05 13:54:53,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:54:53,569 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:53,569 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:53,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable558 [2021-06-05 13:54:53,771 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:53,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:53,771 INFO L82 PathProgramCache]: Analyzing trace with hash 2143162372, now seen corresponding path program 117 times [2021-06-05 13:54:53,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:53,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562719104] [2021-06-05 13:54:53,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:53,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:53,825 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 13:54:53,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:53,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562719104] [2021-06-05 13:54:53,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562719104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:53,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210729063] [2021-06-05 13:54:53,825 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 13:54:53,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:54:53,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:53,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:54:53,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:53,878 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 13:54:53,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210729063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:53,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:53,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 13:54:53,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005810792] [2021-06-05 13:54:53,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:54:53,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:53,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:54:53,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:54:53,879 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 13:54:54,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:54,000 INFO L93 Difference]: Finished difference Result 1517 states and 4176 transitions. [2021-06-05 13:54:54,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:54:54,001 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 13:54:54,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:54,003 INFO L225 Difference]: With dead ends: 1517 [2021-06-05 13:54:54,003 INFO L226 Difference]: Without dead ends: 1513 [2021-06-05 13:54:54,003 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 91.7ms TimeCoverageRelationStatistics Valid=119, Invalid=223, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:54:54,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1513 states. [2021-06-05 13:54:54,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1513 to 1380. [2021-06-05 13:54:54,016 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 13:54:54,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 3995 transitions. [2021-06-05 13:54:54,018 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 3995 transitions. Word has length 19 [2021-06-05 13:54:54,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:54,018 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 3995 transitions. [2021-06-05 13:54:54,018 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 13:54:54,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 3995 transitions. [2021-06-05 13:54:54,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:54:54,019 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:54,019 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:54,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable559 [2021-06-05 13:54:54,220 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:54,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:54,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1266911364, now seen corresponding path program 118 times [2021-06-05 13:54:54,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:54,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866773663] [2021-06-05 13:54:54,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:54,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:54,274 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 13:54:54,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:54,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866773663] [2021-06-05 13:54:54,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866773663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:54,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343700874] [2021-06-05 13:54:54,275 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 13:54:54,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:54:54,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:54,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:54:54,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:54,338 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 13:54:54,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343700874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:54,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:54,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 13:54:54,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627119887] [2021-06-05 13:54:54,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:54:54,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:54,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:54:54,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:54:54,339 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 13:54:54,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:54,485 INFO L93 Difference]: Finished difference Result 1622 states and 4384 transitions. [2021-06-05 13:54:54,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:54:54,485 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 13:54:54,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:54,487 INFO L225 Difference]: With dead ends: 1622 [2021-06-05 13:54:54,487 INFO L226 Difference]: Without dead ends: 1622 [2021-06-05 13:54:54,487 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 134.0ms TimeCoverageRelationStatistics Valid=223, Invalid=427, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:54:54,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2021-06-05 13:54:54,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1221. [2021-06-05 13:54:54,498 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 13:54:54,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 3504 transitions. [2021-06-05 13:54:54,500 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 3504 transitions. Word has length 19 [2021-06-05 13:54:54,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:54,500 INFO L482 AbstractCegarLoop]: Abstraction has 1221 states and 3504 transitions. [2021-06-05 13:54:54,500 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 13:54:54,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 3504 transitions. [2021-06-05 13:54:54,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:54:54,501 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:54,501 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:54,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable560,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:54,702 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:54,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:54,702 INFO L82 PathProgramCache]: Analyzing trace with hash 2040102950, now seen corresponding path program 119 times [2021-06-05 13:54:54,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:54,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189495022] [2021-06-05 13:54:54,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:54,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:54,749 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 13:54:54,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:54,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189495022] [2021-06-05 13:54:54,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189495022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:54,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364304642] [2021-06-05 13:54:54,749 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 13:54:54,788 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:54:54,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:54,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:54:54,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:54,824 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 13:54:54,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364304642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:54,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:54,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 13:54:54,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028216587] [2021-06-05 13:54:54,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:54:54,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:54,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:54:54,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:54:54,825 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 13:54:54,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:54,942 INFO L93 Difference]: Finished difference Result 1376 states and 3711 transitions. [2021-06-05 13:54:54,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:54:54,942 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 13:54:54,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:54,944 INFO L225 Difference]: With dead ends: 1376 [2021-06-05 13:54:54,944 INFO L226 Difference]: Without dead ends: 1372 [2021-06-05 13:54:54,944 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 82.8ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:54:54,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1372 states. [2021-06-05 13:54:54,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1372 to 1231. [2021-06-05 13:54:54,960 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 13:54:54,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 3534 transitions. [2021-06-05 13:54:54,962 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 3534 transitions. Word has length 19 [2021-06-05 13:54:54,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:54,963 INFO L482 AbstractCegarLoop]: Abstraction has 1231 states and 3534 transitions. [2021-06-05 13:54:54,963 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 13:54:54,963 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 3534 transitions. [2021-06-05 13:54:54,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:54:54,964 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:54,964 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:55,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:55,187 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:55,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:55,188 INFO L82 PathProgramCache]: Analyzing trace with hash -537115286, now seen corresponding path program 120 times [2021-06-05 13:54:55,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:55,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910722640] [2021-06-05 13:54:55,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:55,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:55,234 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 13:54:55,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:55,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910722640] [2021-06-05 13:54:55,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910722640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:55,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471132088] [2021-06-05 13:54:55,235 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 13:54:55,266 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:54:55,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:55,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:54:55,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:55,302 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 13:54:55,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471132088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:55,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:55,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 13:54:55,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285991829] [2021-06-05 13:54:55,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:54:55,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:55,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:54:55,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:54:55,303 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 13:54:55,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:55,379 INFO L93 Difference]: Finished difference Result 1459 states and 3899 transitions. [2021-06-05 13:54:55,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:54:55,379 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 13:54:55,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:55,381 INFO L225 Difference]: With dead ends: 1459 [2021-06-05 13:54:55,381 INFO L226 Difference]: Without dead ends: 1459 [2021-06-05 13:54:55,381 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 60.6ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:54:55,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1459 states. [2021-06-05 13:54:55,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1459 to 1232. [2021-06-05 13:54:55,393 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 13:54:55,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 3537 transitions. [2021-06-05 13:54:55,395 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 3537 transitions. Word has length 19 [2021-06-05 13:54:55,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:55,395 INFO L482 AbstractCegarLoop]: Abstraction has 1232 states and 3537 transitions. [2021-06-05 13:54:55,395 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 13:54:55,395 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 3537 transitions. [2021-06-05 13:54:55,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:54:55,396 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:55,396 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:55,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable562 [2021-06-05 13:54:55,597 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:55,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:55,597 INFO L82 PathProgramCache]: Analyzing trace with hash 2028804676, now seen corresponding path program 121 times [2021-06-05 13:54:55,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:55,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370910164] [2021-06-05 13:54:55,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:55,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:55,639 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 13:54:55,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:55,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370910164] [2021-06-05 13:54:55,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370910164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:55,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172932160] [2021-06-05 13:54:55,639 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 13:54:55,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:55,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:54:55,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:55,702 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 13:54:55,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172932160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:55,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:55,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 13:54:55,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487016082] [2021-06-05 13:54:55,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:54:55,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:55,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:54:55,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:54:55,703 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 13:54:55,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:55,805 INFO L93 Difference]: Finished difference Result 1479 states and 3939 transitions. [2021-06-05 13:54:55,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:54:55,805 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 13:54:55,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:55,807 INFO L225 Difference]: With dead ends: 1479 [2021-06-05 13:54:55,807 INFO L226 Difference]: Without dead ends: 1479 [2021-06-05 13:54:55,807 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 86.1ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:54:55,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1479 states. [2021-06-05 13:54:55,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1479 to 1233. [2021-06-05 13:54:55,819 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 13:54:55,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 3540 transitions. [2021-06-05 13:54:55,821 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 3540 transitions. Word has length 19 [2021-06-05 13:54:55,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:55,821 INFO L482 AbstractCegarLoop]: Abstraction has 1233 states and 3540 transitions. [2021-06-05 13:54:55,821 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 13:54:55,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 3540 transitions. [2021-06-05 13:54:55,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:54:55,822 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:55,822 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:56,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable563,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:56,024 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:56,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:56,025 INFO L82 PathProgramCache]: Analyzing trace with hash -32055126, now seen corresponding path program 122 times [2021-06-05 13:54:56,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:56,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488870480] [2021-06-05 13:54:56,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:56,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:56,071 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 13:54:56,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:56,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488870480] [2021-06-05 13:54:56,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488870480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:56,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240701238] [2021-06-05 13:54:56,072 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 13:54:56,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:54:56,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:56,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:54:56,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:56,133 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 13:54:56,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240701238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:56,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:56,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 13:54:56,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42270049] [2021-06-05 13:54:56,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:54:56,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:56,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:54:56,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:54:56,134 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 13:54:56,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:56,219 INFO L93 Difference]: Finished difference Result 1443 states and 3863 transitions. [2021-06-05 13:54:56,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:54:56,220 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 13:54:56,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:56,221 INFO L225 Difference]: With dead ends: 1443 [2021-06-05 13:54:56,221 INFO L226 Difference]: Without dead ends: 1443 [2021-06-05 13:54:56,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 81.2ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:54:56,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2021-06-05 13:54:56,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 1226. [2021-06-05 13:54:56,235 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 13:54:56,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 3521 transitions. [2021-06-05 13:54:56,236 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 3521 transitions. Word has length 19 [2021-06-05 13:54:56,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:56,237 INFO L482 AbstractCegarLoop]: Abstraction has 1226 states and 3521 transitions. [2021-06-05 13:54:56,237 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 13:54:56,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 3521 transitions. [2021-06-05 13:54:56,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:54:56,238 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:56,238 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:56,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable564 [2021-06-05 13:54:56,438 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:56,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:56,439 INFO L82 PathProgramCache]: Analyzing trace with hash 505800452, now seen corresponding path program 123 times [2021-06-05 13:54:56,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:56,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034238491] [2021-06-05 13:54:56,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:56,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:56,487 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 13:54:56,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:56,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034238491] [2021-06-05 13:54:56,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034238491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:56,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803057732] [2021-06-05 13:54:56,487 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 13:54:56,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:54:56,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:56,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:54:56,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:56,553 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 13:54:56,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803057732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:56,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:56,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 13:54:56,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405416949] [2021-06-05 13:54:56,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:54:56,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:56,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:54:56,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:54:56,554 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 13:54:56,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:56,644 INFO L93 Difference]: Finished difference Result 1646 states and 4470 transitions. [2021-06-05 13:54:56,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:54:56,644 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 13:54:56,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:56,646 INFO L225 Difference]: With dead ends: 1646 [2021-06-05 13:54:56,646 INFO L226 Difference]: Without dead ends: 1646 [2021-06-05 13:54:56,646 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 74.6ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:54:56,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2021-06-05 13:54:56,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1435. [2021-06-05 13:54:56,659 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 13:54:56,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1435 states to 1435 states and 4140 transitions. [2021-06-05 13:54:56,661 INFO L78 Accepts]: Start accepts. Automaton has 1435 states and 4140 transitions. Word has length 19 [2021-06-05 13:54:56,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:56,661 INFO L482 AbstractCegarLoop]: Abstraction has 1435 states and 4140 transitions. [2021-06-05 13:54:56,661 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 13:54:56,661 INFO L276 IsEmpty]: Start isEmpty. Operand 1435 states and 4140 transitions. [2021-06-05 13:54:56,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:54:56,662 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:56,662 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:56,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable565 [2021-06-05 13:54:56,864 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:56,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:56,864 INFO L82 PathProgramCache]: Analyzing trace with hash -545814, now seen corresponding path program 124 times [2021-06-05 13:54:56,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:56,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324733527] [2021-06-05 13:54:56,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:56,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:56,921 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 13:54:56,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:56,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324733527] [2021-06-05 13:54:56,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324733527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:56,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114128881] [2021-06-05 13:54:56,921 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 13:54:56,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:54:56,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:56,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:54:56,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:56,991 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 13:54:56,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114128881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:56,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:56,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 13:54:56,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680142723] [2021-06-05 13:54:56,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:54:56,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:56,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:54:56,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:54:56,992 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 13:54:57,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:57,152 INFO L93 Difference]: Finished difference Result 1661 states and 4495 transitions. [2021-06-05 13:54:57,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:54:57,152 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 13:54:57,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:57,155 INFO L225 Difference]: With dead ends: 1661 [2021-06-05 13:54:57,155 INFO L226 Difference]: Without dead ends: 1661 [2021-06-05 13:54:57,155 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 127.0ms TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:54:57,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2021-06-05 13:54:57,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1435. [2021-06-05 13:54:57,173 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 13:54:57,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1435 states to 1435 states and 4140 transitions. [2021-06-05 13:54:57,176 INFO L78 Accepts]: Start accepts. Automaton has 1435 states and 4140 transitions. Word has length 19 [2021-06-05 13:54:57,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:57,177 INFO L482 AbstractCegarLoop]: Abstraction has 1435 states and 4140 transitions. [2021-06-05 13:54:57,177 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 13:54:57,177 INFO L276 IsEmpty]: Start isEmpty. Operand 1435 states and 4140 transitions. [2021-06-05 13:54:57,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:54:57,178 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:57,179 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:57,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable566 [2021-06-05 13:54:57,394 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:57,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:57,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1482589124, now seen corresponding path program 125 times [2021-06-05 13:54:57,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:57,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055285283] [2021-06-05 13:54:57,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:57,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:57,455 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 13:54:57,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:57,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055285283] [2021-06-05 13:54:57,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055285283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:57,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305284991] [2021-06-05 13:54:57,456 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 13:54:57,484 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:54:57,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:57,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:54:57,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:57,525 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 13:54:57,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305284991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:57,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:57,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 13:54:57,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637998267] [2021-06-05 13:54:57,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:54:57,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:57,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:54:57,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:54:57,526 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 13:54:57,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:57,740 INFO L93 Difference]: Finished difference Result 1853 states and 5030 transitions. [2021-06-05 13:54:57,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:54:57,740 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 13:54:57,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:57,742 INFO L225 Difference]: With dead ends: 1853 [2021-06-05 13:54:57,742 INFO L226 Difference]: Without dead ends: 1853 [2021-06-05 13:54:57,742 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 188.8ms TimeCoverageRelationStatistics Valid=293, Invalid=577, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:54:57,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1853 states. [2021-06-05 13:54:57,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1853 to 1564. [2021-06-05 13:54:57,758 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 13:54:57,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 4536 transitions. [2021-06-05 13:54:57,760 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 4536 transitions. Word has length 19 [2021-06-05 13:54:57,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:57,760 INFO L482 AbstractCegarLoop]: Abstraction has 1564 states and 4536 transitions. [2021-06-05 13:54:57,760 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 13:54:57,760 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 4536 transitions. [2021-06-05 13:54:57,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:54:57,762 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:57,762 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:57,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable567,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:57,977 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:57,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:57,977 INFO L82 PathProgramCache]: Analyzing trace with hash -554248274, now seen corresponding path program 126 times [2021-06-05 13:54:57,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:57,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65225023] [2021-06-05 13:54:57,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:57,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:58,041 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 13:54:58,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:58,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65225023] [2021-06-05 13:54:58,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65225023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:58,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232585585] [2021-06-05 13:54:58,041 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 13:54:58,067 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:54:58,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:58,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:54:58,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:58,110 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 13:54:58,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232585585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:58,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:58,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-06-05 13:54:58,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653765408] [2021-06-05 13:54:58,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:54:58,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:58,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:54:58,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:54:58,112 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 13:54:58,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:58,290 INFO L93 Difference]: Finished difference Result 1749 states and 4790 transitions. [2021-06-05 13:54:58,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:54:58,291 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 13:54:58,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:58,293 INFO L225 Difference]: With dead ends: 1749 [2021-06-05 13:54:58,293 INFO L226 Difference]: Without dead ends: 1743 [2021-06-05 13:54:58,293 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 150.2ms TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:54:58,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1743 states. [2021-06-05 13:54:58,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1743 to 1529. [2021-06-05 13:54:58,310 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 13:54:58,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 4407 transitions. [2021-06-05 13:54:58,313 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 4407 transitions. Word has length 19 [2021-06-05 13:54:58,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:58,313 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 4407 transitions. [2021-06-05 13:54:58,313 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 13:54:58,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 4407 transitions. [2021-06-05 13:54:58,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:54:58,315 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:58,315 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:58,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable568 [2021-06-05 13:54:58,538 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:58,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:58,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1091484980, now seen corresponding path program 127 times [2021-06-05 13:54:58,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:58,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90485580] [2021-06-05 13:54:58,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:58,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:58,597 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 13:54:58,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:58,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90485580] [2021-06-05 13:54:58,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90485580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:58,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104572602] [2021-06-05 13:54:58,597 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 13:54:58,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:58,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:54:58,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:58,707 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 13:54:58,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104572602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:58,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:58,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-05 13:54:58,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240703557] [2021-06-05 13:54:58,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:54:58,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:58,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:54:58,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:54:58,708 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 13:54:58,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:58,847 INFO L93 Difference]: Finished difference Result 1732 states and 4850 transitions. [2021-06-05 13:54:58,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:54:58,847 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 13:54:58,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:58,849 INFO L225 Difference]: With dead ends: 1732 [2021-06-05 13:54:58,849 INFO L226 Difference]: Without dead ends: 1732 [2021-06-05 13:54:58,849 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 141.0ms TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:54:58,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1732 states. [2021-06-05 13:54:58,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1732 to 1596. [2021-06-05 13:54:58,865 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 13:54:58,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1596 states to 1596 states and 4609 transitions. [2021-06-05 13:54:58,867 INFO L78 Accepts]: Start accepts. Automaton has 1596 states and 4609 transitions. Word has length 19 [2021-06-05 13:54:58,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:58,867 INFO L482 AbstractCegarLoop]: Abstraction has 1596 states and 4609 transitions. [2021-06-05 13:54:58,867 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 13:54:58,867 INFO L276 IsEmpty]: Start isEmpty. Operand 1596 states and 4609 transitions. [2021-06-05 13:54:58,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:54:58,869 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:58,869 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:59,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable569 [2021-06-05 13:54:59,070 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:59,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:59,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1597831246, now seen corresponding path program 128 times [2021-06-05 13:54:59,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:59,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292065748] [2021-06-05 13:54:59,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:59,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:59,146 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 13:54:59,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:59,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292065748] [2021-06-05 13:54:59,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292065748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:59,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327712694] [2021-06-05 13:54:59,146 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 13:54:59,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:54:59,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:59,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:54:59,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:59,321 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 13:54:59,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327712694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:59,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:59,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-05 13:54:59,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942897255] [2021-06-05 13:54:59,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:54:59,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:59,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:54:59,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:54:59,322 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 13:54:59,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:59,590 INFO L93 Difference]: Finished difference Result 1746 states and 4863 transitions. [2021-06-05 13:54:59,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:54:59,591 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 13:54:59,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:59,592 INFO L225 Difference]: With dead ends: 1746 [2021-06-05 13:54:59,592 INFO L226 Difference]: Without dead ends: 1746 [2021-06-05 13:54:59,593 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 224.3ms TimeCoverageRelationStatistics Valid=331, Invalid=661, Unknown=0, NotChecked=0, Total=992 [2021-06-05 13:54:59,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1746 states. [2021-06-05 13:54:59,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1746 to 1507. [2021-06-05 13:54:59,606 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 13:54:59,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1507 states to 1507 states and 4333 transitions. [2021-06-05 13:54:59,608 INFO L78 Accepts]: Start accepts. Automaton has 1507 states and 4333 transitions. Word has length 19 [2021-06-05 13:54:59,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:59,608 INFO L482 AbstractCegarLoop]: Abstraction has 1507 states and 4333 transitions. [2021-06-05 13:54:59,608 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 13:54:59,608 INFO L276 IsEmpty]: Start isEmpty. Operand 1507 states and 4333 transitions. [2021-06-05 13:54:59,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:54:59,609 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:59,610 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:59,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable570,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:59,810 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:59,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:59,810 INFO L82 PathProgramCache]: Analyzing trace with hash -114696308, now seen corresponding path program 129 times [2021-06-05 13:54:59,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:59,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612014823] [2021-06-05 13:54:59,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:59,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:59,879 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 13:54:59,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:59,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612014823] [2021-06-05 13:54:59,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612014823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:59,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659981891] [2021-06-05 13:54:59,880 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 13:54:59,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:54:59,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:59,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:54:59,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:59,950 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 13:54:59,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659981891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:59,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:59,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-05 13:54:59,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658441913] [2021-06-05 13:54:59,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:54:59,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:59,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:54:59,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:54:59,951 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 13:55:00,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:00,281 INFO L93 Difference]: Finished difference Result 1884 states and 5161 transitions. [2021-06-05 13:55:00,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 13:55:00,281 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 13:55:00,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:00,284 INFO L225 Difference]: With dead ends: 1884 [2021-06-05 13:55:00,284 INFO L226 Difference]: Without dead ends: 1884 [2021-06-05 13:55:00,284 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 278.9ms TimeCoverageRelationStatistics Valid=395, Invalid=795, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 13:55:00,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2021-06-05 13:55:00,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1484. [2021-06-05 13:55:00,302 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 13:55:00,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 4270 transitions. [2021-06-05 13:55:00,304 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 4270 transitions. Word has length 19 [2021-06-05 13:55:00,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:00,305 INFO L482 AbstractCegarLoop]: Abstraction has 1484 states and 4270 transitions. [2021-06-05 13:55:00,305 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 13:55:00,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 4270 transitions. [2021-06-05 13:55:00,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:55:00,306 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:00,306 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:00,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable571,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:00,507 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:00,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:00,507 INFO L82 PathProgramCache]: Analyzing trace with hash -2004726350, now seen corresponding path program 130 times [2021-06-05 13:55:00,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:00,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364847029] [2021-06-05 13:55:00,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:00,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:00,576 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 13:55:00,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:00,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364847029] [2021-06-05 13:55:00,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364847029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:00,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006647721] [2021-06-05 13:55:00,576 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 13:55:00,601 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:55:00,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:00,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:55:00,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:00,660 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 13:55:00,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006647721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:00,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:00,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-06-05 13:55:00,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355906185] [2021-06-05 13:55:00,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:55:00,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:00,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:55:00,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:55:00,661 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 13:55:00,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:00,824 INFO L93 Difference]: Finished difference Result 1607 states and 4421 transitions. [2021-06-05 13:55:00,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:55:00,824 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 13:55:00,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:00,826 INFO L225 Difference]: With dead ends: 1607 [2021-06-05 13:55:00,826 INFO L226 Difference]: Without dead ends: 1603 [2021-06-05 13:55:00,826 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 142.7ms TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:55:00,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1603 states. [2021-06-05 13:55:00,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1603 to 1484. [2021-06-05 13:55:00,839 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 13:55:00,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 4267 transitions. [2021-06-05 13:55:00,841 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 4267 transitions. Word has length 19 [2021-06-05 13:55:00,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:00,842 INFO L482 AbstractCegarLoop]: Abstraction has 1484 states and 4267 transitions. [2021-06-05 13:55:00,842 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 13:55:00,842 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 4267 transitions. [2021-06-05 13:55:00,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:55:00,843 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:00,843 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:01,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable572,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:01,056 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:01,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:01,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1629667698, now seen corresponding path program 131 times [2021-06-05 13:55:01,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:01,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036370781] [2021-06-05 13:55:01,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:01,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:01,120 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 13:55:01,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:01,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036370781] [2021-06-05 13:55:01,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036370781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:01,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69532340] [2021-06-05 13:55:01,120 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 13:55:01,144 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:55:01,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:01,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:55:01,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:01,196 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 13:55:01,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69532340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:01,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:01,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-06-05 13:55:01,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134368060] [2021-06-05 13:55:01,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:55:01,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:01,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:55:01,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:55:01,197 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 13:55:01,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:01,436 INFO L93 Difference]: Finished difference Result 1883 states and 5198 transitions. [2021-06-05 13:55:01,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:55:01,437 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 13:55:01,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:01,438 INFO L225 Difference]: With dead ends: 1883 [2021-06-05 13:55:01,439 INFO L226 Difference]: Without dead ends: 1883 [2021-06-05 13:55:01,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 214.2ms TimeCoverageRelationStatistics Valid=331, Invalid=725, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 13:55:01,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1883 states. [2021-06-05 13:55:01,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1883 to 1685. [2021-06-05 13:55:01,455 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 13:55:01,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1685 states to 1685 states and 4878 transitions. [2021-06-05 13:55:01,459 INFO L78 Accepts]: Start accepts. Automaton has 1685 states and 4878 transitions. Word has length 19 [2021-06-05 13:55:01,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:01,459 INFO L482 AbstractCegarLoop]: Abstraction has 1685 states and 4878 transitions. [2021-06-05 13:55:01,459 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 13:55:01,459 INFO L276 IsEmpty]: Start isEmpty. Operand 1685 states and 4878 transitions. [2021-06-05 13:55:01,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:55:01,461 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:01,461 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:01,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable573 [2021-06-05 13:55:01,677 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:01,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:01,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1550714670, now seen corresponding path program 132 times [2021-06-05 13:55:01,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:01,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647445027] [2021-06-05 13:55:01,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:01,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:01,739 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 13:55:01,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:01,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647445027] [2021-06-05 13:55:01,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647445027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:01,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288996862] [2021-06-05 13:55:01,740 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 13:55:01,764 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:55:01,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:01,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:55:01,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:01,798 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 13:55:01,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288996862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:01,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:01,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 13 [2021-06-05 13:55:01,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282107384] [2021-06-05 13:55:01,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:55:01,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:01,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:55:01,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:55:01,799 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 13:55:01,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:01,934 INFO L93 Difference]: Finished difference Result 1804 states and 5036 transitions. [2021-06-05 13:55:01,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:55:01,934 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 13:55:01,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:01,936 INFO L225 Difference]: With dead ends: 1804 [2021-06-05 13:55:01,936 INFO L226 Difference]: Without dead ends: 1802 [2021-06-05 13:55:01,936 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 115.0ms TimeCoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:55:01,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2021-06-05 13:55:01,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1697. [2021-06-05 13:55:01,951 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 13:55:01,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1697 states to 1697 states and 4916 transitions. [2021-06-05 13:55:01,953 INFO L78 Accepts]: Start accepts. Automaton has 1697 states and 4916 transitions. Word has length 19 [2021-06-05 13:55:01,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:01,954 INFO L482 AbstractCegarLoop]: Abstraction has 1697 states and 4916 transitions. [2021-06-05 13:55:01,954 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 13:55:01,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1697 states and 4916 transitions. [2021-06-05 13:55:01,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:55:01,965 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:01,965 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:02,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable574 [2021-06-05 13:55:02,167 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:02,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:02,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1026503566, now seen corresponding path program 133 times [2021-06-05 13:55:02,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:02,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650572061] [2021-06-05 13:55:02,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:02,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:02,234 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 13:55:02,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:02,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650572061] [2021-06-05 13:55:02,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650572061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:02,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777330149] [2021-06-05 13:55:02,235 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 13:55:02,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:02,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:55:02,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:02,323 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 13:55:02,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777330149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:02,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:02,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 13 [2021-06-05 13:55:02,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209392086] [2021-06-05 13:55:02,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:55:02,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:02,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:55:02,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:55:02,324 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 13:55:02,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:02,450 INFO L93 Difference]: Finished difference Result 1866 states and 5178 transitions. [2021-06-05 13:55:02,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:55:02,451 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 13:55:02,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:02,453 INFO L225 Difference]: With dead ends: 1866 [2021-06-05 13:55:02,453 INFO L226 Difference]: Without dead ends: 1866 [2021-06-05 13:55:02,453 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 126.7ms TimeCoverageRelationStatistics Valid=170, Invalid=336, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:55:02,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1866 states. [2021-06-05 13:55:02,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1866 to 1698. [2021-06-05 13:55:02,468 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 13:55:02,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1698 states to 1698 states and 4917 transitions. [2021-06-05 13:55:02,470 INFO L78 Accepts]: Start accepts. Automaton has 1698 states and 4917 transitions. Word has length 19 [2021-06-05 13:55:02,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:02,470 INFO L482 AbstractCegarLoop]: Abstraction has 1698 states and 4917 transitions. [2021-06-05 13:55:02,470 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 13:55:02,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1698 states and 4917 transitions. [2021-06-05 13:55:02,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:55:02,472 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:02,472 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:02,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable575 [2021-06-05 13:55:02,693 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:02,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:02,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1539416396, now seen corresponding path program 134 times [2021-06-05 13:55:02,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:02,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893796207] [2021-06-05 13:55:02,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:02,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:02,760 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 13:55:02,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:02,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893796207] [2021-06-05 13:55:02,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893796207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:02,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732853383] [2021-06-05 13:55:02,761 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 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 13:55:02,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:55:02,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:02,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:55:02,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:02,834 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 13:55:02,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732853383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:02,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:02,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 14 [2021-06-05 13:55:02,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367259651] [2021-06-05 13:55:02,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:55:02,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:02,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:55:02,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:55:02,835 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 13:55:02,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:02,993 INFO L93 Difference]: Finished difference Result 1913 states and 5283 transitions. [2021-06-05 13:55:02,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:55:02,993 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 13:55:02,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:02,995 INFO L225 Difference]: With dead ends: 1913 [2021-06-05 13:55:02,996 INFO L226 Difference]: Without dead ends: 1913 [2021-06-05 13:55:02,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 158.5ms TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:55:02,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2021-06-05 13:55:03,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1700. [2021-06-05 13:55:03,013 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 13:55:03,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1700 states to 1700 states and 4921 transitions. [2021-06-05 13:55:03,015 INFO L78 Accepts]: Start accepts. Automaton has 1700 states and 4921 transitions. Word has length 19 [2021-06-05 13:55:03,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:03,015 INFO L482 AbstractCegarLoop]: Abstraction has 1700 states and 4921 transitions. [2021-06-05 13:55:03,016 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 13:55:03,016 INFO L276 IsEmpty]: Start isEmpty. Operand 1700 states and 4921 transitions. [2021-06-05 13:55:03,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:55:03,017 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:03,017 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:03,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable576 [2021-06-05 13:55:03,218 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:03,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:03,218 INFO L82 PathProgramCache]: Analyzing trace with hash -521443406, now seen corresponding path program 135 times [2021-06-05 13:55:03,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:03,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956937350] [2021-06-05 13:55:03,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:03,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:03,302 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 13:55:03,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:03,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956937350] [2021-06-05 13:55:03,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956937350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:03,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059042220] [2021-06-05 13:55:03,302 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 13:55:03,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:55:03,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:03,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:55:03,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:03,386 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 13:55:03,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059042220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:03,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:03,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 14 [2021-06-05 13:55:03,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075921786] [2021-06-05 13:55:03,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:55:03,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:03,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:55:03,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:55:03,387 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 13:55:03,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:03,593 INFO L93 Difference]: Finished difference Result 2111 states and 5864 transitions. [2021-06-05 13:55:03,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:55:03,593 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 13:55:03,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:03,595 INFO L225 Difference]: With dead ends: 2111 [2021-06-05 13:55:03,595 INFO L226 Difference]: Without dead ends: 2111 [2021-06-05 13:55:03,596 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 198.4ms TimeCoverageRelationStatistics Valid=269, Invalid=601, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:55:03,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2111 states. [2021-06-05 13:55:03,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2111 to 1895. [2021-06-05 13:55:03,617 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 13:55:03,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1895 states to 1895 states and 5516 transitions. [2021-06-05 13:55:03,619 INFO L78 Accepts]: Start accepts. Automaton has 1895 states and 5516 transitions. Word has length 19 [2021-06-05 13:55:03,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:03,620 INFO L482 AbstractCegarLoop]: Abstraction has 1895 states and 5516 transitions. [2021-06-05 13:55:03,620 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 13:55:03,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1895 states and 5516 transitions. [2021-06-05 13:55:03,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:55:03,621 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:03,621 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:03,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable577,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:03,822 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:03,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:03,822 INFO L82 PathProgramCache]: Analyzing trace with hash 16412172, now seen corresponding path program 136 times [2021-06-05 13:55:03,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:03,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182108049] [2021-06-05 13:55:03,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:03,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:03,889 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 13:55:03,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:03,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182108049] [2021-06-05 13:55:03,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182108049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:03,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227661289] [2021-06-05 13:55:03,889 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 13:55:03,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:55:03,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:03,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:55:03,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:03,989 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 13:55:03,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227661289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:03,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:03,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 15 [2021-06-05 13:55:03,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359349749] [2021-06-05 13:55:03,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:55:03,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:03,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:55:03,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:55:03,990 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 13:55:04,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:04,191 INFO L93 Difference]: Finished difference Result 2071 states and 5772 transitions. [2021-06-05 13:55:04,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:55:04,192 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 13:55:04,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:04,194 INFO L225 Difference]: With dead ends: 2071 [2021-06-05 13:55:04,194 INFO L226 Difference]: Without dead ends: 2071 [2021-06-05 13:55:04,194 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 221.5ms TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:55:04,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2021-06-05 13:55:04,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 1876. [2021-06-05 13:55:04,210 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 13:55:04,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 5453 transitions. [2021-06-05 13:55:04,212 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 5453 transitions. Word has length 19 [2021-06-05 13:55:04,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:04,213 INFO L482 AbstractCegarLoop]: Abstraction has 1876 states and 5453 transitions. [2021-06-05 13:55:04,213 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 13:55:04,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 5453 transitions. [2021-06-05 13:55:04,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:55:04,214 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:04,214 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:04,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable578 [2021-06-05 13:55:04,415 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:04,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:04,415 INFO L82 PathProgramCache]: Analyzing trace with hash -489934094, now seen corresponding path program 137 times [2021-06-05 13:55:04,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:04,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357302216] [2021-06-05 13:55:04,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:04,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:04,486 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 13:55:04,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:04,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357302216] [2021-06-05 13:55:04,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357302216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:04,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104850272] [2021-06-05 13:55:04,486 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 13:55:04,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:55:04,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:04,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:55:04,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:04,568 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 13:55:04,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104850272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:04,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:04,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 15 [2021-06-05 13:55:04,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608478042] [2021-06-05 13:55:04,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:55:04,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:04,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:55:04,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:55:04,569 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 13:55:04,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:04,750 INFO L93 Difference]: Finished difference Result 2136 states and 6078 transitions. [2021-06-05 13:55:04,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:55:04,750 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 13:55:04,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:04,752 INFO L225 Difference]: With dead ends: 2136 [2021-06-05 13:55:04,752 INFO L226 Difference]: Without dead ends: 2136 [2021-06-05 13:55:04,752 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 185.4ms TimeCoverageRelationStatistics Valid=241, Invalid=571, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:55:04,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2136 states. [2021-06-05 13:55:04,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2136 to 2034. [2021-06-05 13:55:04,770 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 13:55:04,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2034 states to 2034 states and 5934 transitions. [2021-06-05 13:55:04,773 INFO L78 Accepts]: Start accepts. Automaton has 2034 states and 5934 transitions. Word has length 19 [2021-06-05 13:55:04,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:04,773 INFO L482 AbstractCegarLoop]: Abstraction has 2034 states and 5934 transitions. [2021-06-05 13:55:04,773 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 13:55:04,773 INFO L276 IsEmpty]: Start isEmpty. Operand 2034 states and 5934 transitions. [2021-06-05 13:55:04,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:55:04,774 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:04,775 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:04,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable579 [2021-06-05 13:55:04,975 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:04,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:04,975 INFO L82 PathProgramCache]: Analyzing trace with hash 993200844, now seen corresponding path program 138 times [2021-06-05 13:55:04,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:04,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882302988] [2021-06-05 13:55:04,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:04,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:05,044 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 13:55:05,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:05,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882302988] [2021-06-05 13:55:05,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882302988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:05,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974026912] [2021-06-05 13:55:05,045 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 13:55:05,070 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:55:05,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:05,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:55:05,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:05,132 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 13:55:05,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974026912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:05,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:05,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 13:55:05,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340099791] [2021-06-05 13:55:05,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:55:05,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:05,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:55:05,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:55:05,133 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 13:55:05,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:05,339 INFO L93 Difference]: Finished difference Result 2171 states and 6166 transitions. [2021-06-05 13:55:05,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:55:05,339 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 13:55:05,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:05,341 INFO L225 Difference]: With dead ends: 2171 [2021-06-05 13:55:05,341 INFO L226 Difference]: Without dead ends: 2171 [2021-06-05 13:55:05,341 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 204.5ms TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:55:05,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2021-06-05 13:55:05,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 2028. [2021-06-05 13:55:05,358 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 13:55:05,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 5915 transitions. [2021-06-05 13:55:05,361 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 5915 transitions. Word has length 19 [2021-06-05 13:55:05,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:05,361 INFO L482 AbstractCegarLoop]: Abstraction has 2028 states and 5915 transitions. [2021-06-05 13:55:05,361 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 13:55:05,361 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 5915 transitions. [2021-06-05 13:55:05,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:55:05,363 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:05,363 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:05,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:05,563 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:05,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:05,563 INFO L82 PathProgramCache]: Analyzing trace with hash -274256334, now seen corresponding path program 139 times [2021-06-05 13:55:05,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:05,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037439861] [2021-06-05 13:55:05,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:05,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:05,666 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 13:55:05,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:05,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037439861] [2021-06-05 13:55:05,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037439861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:05,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104417621] [2021-06-05 13:55:05,666 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 13:55:05,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:05,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:55:05,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:05,759 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 13:55:05,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104417621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:05,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:05,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 13:55:05,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164993400] [2021-06-05 13:55:05,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:55:05,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:05,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:55:05,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:55:05,760 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 13:55:06,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:06,063 INFO L93 Difference]: Finished difference Result 2447 states and 6973 transitions. [2021-06-05 13:55:06,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 13:55:06,064 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 13:55:06,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:06,066 INFO L225 Difference]: With dead ends: 2447 [2021-06-05 13:55:06,066 INFO L226 Difference]: Without dead ends: 2447 [2021-06-05 13:55:06,067 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 313.4ms TimeCoverageRelationStatistics Valid=495, Invalid=1145, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 13:55:06,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2021-06-05 13:55:06,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 2072. [2021-06-05 13:55:06,088 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 13:55:06,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 6048 transitions. [2021-06-05 13:55:06,091 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 6048 transitions. Word has length 19 [2021-06-05 13:55:06,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:06,092 INFO L482 AbstractCegarLoop]: Abstraction has 2072 states and 6048 transitions. [2021-06-05 13:55:06,092 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 13:55:06,092 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 6048 transitions. [2021-06-05 13:55:06,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:55:06,094 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:06,094 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:06,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:06,294 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:06,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:06,295 INFO L82 PathProgramCache]: Analyzing trace with hash 935559555, now seen corresponding path program 140 times [2021-06-05 13:55:06,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:06,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565001670] [2021-06-05 13:55:06,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:06,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:06,352 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 13:55:06,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:06,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565001670] [2021-06-05 13:55:06,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565001670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:06,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605452623] [2021-06-05 13:55:06,353 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 13:55:06,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:55:06,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:06,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:55:06,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:06,429 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 13:55:06,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605452623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:06,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:06,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 11 [2021-06-05 13:55:06,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121451805] [2021-06-05 13:55:06,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:55:06,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:06,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:55:06,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:55:06,430 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 13:55:06,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:06,563 INFO L93 Difference]: Finished difference Result 2203 states and 6267 transitions. [2021-06-05 13:55:06,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:55:06,563 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 13:55:06,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:06,566 INFO L225 Difference]: With dead ends: 2203 [2021-06-05 13:55:06,566 INFO L226 Difference]: Without dead ends: 2199 [2021-06-05 13:55:06,566 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 100.6ms TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:55:06,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-06-05 13:55:06,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 2069. [2021-06-05 13:55:06,584 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 13:55:06,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2069 states to 2069 states and 6037 transitions. [2021-06-05 13:55:06,587 INFO L78 Accepts]: Start accepts. Automaton has 2069 states and 6037 transitions. Word has length 20 [2021-06-05 13:55:06,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:06,587 INFO L482 AbstractCegarLoop]: Abstraction has 2069 states and 6037 transitions. [2021-06-05 13:55:06,587 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 13:55:06,587 INFO L276 IsEmpty]: Start isEmpty. Operand 2069 states and 6037 transitions. [2021-06-05 13:55:06,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:55:06,589 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:06,589 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:06,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable582,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:06,790 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:06,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:06,790 INFO L82 PathProgramCache]: Analyzing trace with hash -221292409, now seen corresponding path program 141 times [2021-06-05 13:55:06,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:06,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780912623] [2021-06-05 13:55:06,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:06,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:06,835 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 13:55:06,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:06,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780912623] [2021-06-05 13:55:06,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780912623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:06,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033988352] [2021-06-05 13:55:06,836 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 13:55:06,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:55:06,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:06,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:55:06,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:06,919 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 13:55:06,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033988352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:06,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:06,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 13:55:06,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163170863] [2021-06-05 13:55:06,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:55:06,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:06,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:55:06,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:55:06,920 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 13:55:06,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:06,989 INFO L93 Difference]: Finished difference Result 2256 states and 6332 transitions. [2021-06-05 13:55:06,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:55:06,989 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 13:55:06,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:06,991 INFO L225 Difference]: With dead ends: 2256 [2021-06-05 13:55:06,991 INFO L226 Difference]: Without dead ends: 2254 [2021-06-05 13:55:06,991 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 57.1ms TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:55:06,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2254 states. [2021-06-05 13:55:07,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2254 to 2079. [2021-06-05 13:55:07,009 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 13:55:07,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2079 states to 2079 states and 6064 transitions. [2021-06-05 13:55:07,012 INFO L78 Accepts]: Start accepts. Automaton has 2079 states and 6064 transitions. Word has length 20 [2021-06-05 13:55:07,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:07,012 INFO L482 AbstractCegarLoop]: Abstraction has 2079 states and 6064 transitions. [2021-06-05 13:55:07,012 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 13:55:07,012 INFO L276 IsEmpty]: Start isEmpty. Operand 2079 states and 6064 transitions. [2021-06-05 13:55:07,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:55:07,014 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:07,014 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:07,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable583 [2021-06-05 13:55:07,215 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:07,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:07,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1524162281, now seen corresponding path program 142 times [2021-06-05 13:55:07,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:07,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14367301] [2021-06-05 13:55:07,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:07,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:07,255 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 13:55:07,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:07,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14367301] [2021-06-05 13:55:07,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14367301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:07,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698841710] [2021-06-05 13:55:07,256 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 13:55:07,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:55:07,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:07,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:55:07,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:07,314 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 13:55:07,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698841710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:07,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:07,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-05 13:55:07,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908689696] [2021-06-05 13:55:07,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:55:07,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:07,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:55:07,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:55:07,316 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 13:55:07,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:07,416 INFO L93 Difference]: Finished difference Result 2285 states and 6387 transitions. [2021-06-05 13:55:07,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:55:07,417 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 13:55:07,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:07,419 INFO L225 Difference]: With dead ends: 2285 [2021-06-05 13:55:07,419 INFO L226 Difference]: Without dead ends: 2284 [2021-06-05 13:55:07,419 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 75.7ms TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:55:07,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2284 states. [2021-06-05 13:55:07,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2284 to 2072. [2021-06-05 13:55:07,439 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 13:55:07,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 6035 transitions. [2021-06-05 13:55:07,442 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 6035 transitions. Word has length 20 [2021-06-05 13:55:07,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:07,442 INFO L482 AbstractCegarLoop]: Abstraction has 2072 states and 6035 transitions. [2021-06-05 13:55:07,442 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 13:55:07,442 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 6035 transitions. [2021-06-05 13:55:07,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:55:07,444 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:07,444 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:07,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable584 [2021-06-05 13:55:07,649 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:07,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:07,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1060191707, now seen corresponding path program 143 times [2021-06-05 13:55:07,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:07,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688534558] [2021-06-05 13:55:07,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:07,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:07,694 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 13:55:07,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:07,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688534558] [2021-06-05 13:55:07,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688534558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:07,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56799382] [2021-06-05 13:55:07,695 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 13:55:07,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:55:07,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:07,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:55:07,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:07,752 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 13:55:07,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56799382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:07,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:07,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 13:55:07,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954084042] [2021-06-05 13:55:07,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:55:07,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:07,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:55:07,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:55:07,753 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 13:55:07,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:07,909 INFO L93 Difference]: Finished difference Result 2223 states and 6241 transitions. [2021-06-05 13:55:07,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:55:07,910 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 13:55:07,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:07,913 INFO L225 Difference]: With dead ends: 2223 [2021-06-05 13:55:07,913 INFO L226 Difference]: Without dead ends: 2220 [2021-06-05 13:55:07,913 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 102.1ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:55:07,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2220 states. [2021-06-05 13:55:07,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2220 to 2065. [2021-06-05 13:55:07,933 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 13:55:07,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 6003 transitions. [2021-06-05 13:55:07,935 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 6003 transitions. Word has length 20 [2021-06-05 13:55:07,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:07,935 INFO L482 AbstractCegarLoop]: Abstraction has 2065 states and 6003 transitions. [2021-06-05 13:55:07,935 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 13:55:07,936 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 6003 transitions. [2021-06-05 13:55:07,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:55:07,937 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:07,937 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:08,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable585 [2021-06-05 13:55:08,138 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:08,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:08,138 INFO L82 PathProgramCache]: Analyzing trace with hash 429213289, now seen corresponding path program 144 times [2021-06-05 13:55:08,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:08,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132015639] [2021-06-05 13:55:08,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:08,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:08,192 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 13:55:08,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:08,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132015639] [2021-06-05 13:55:08,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132015639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:08,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444294293] [2021-06-05 13:55:08,192 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 13:55:08,224 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 13:55:08,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:08,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:55:08,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:08,258 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 13:55:08,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444294293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:08,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:08,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:55:08,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783461670] [2021-06-05 13:55:08,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:55:08,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:08,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:55:08,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:55:08,259 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 13:55:08,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:08,412 INFO L93 Difference]: Finished difference Result 2220 states and 6216 transitions. [2021-06-05 13:55:08,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:55:08,413 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 13:55:08,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:08,415 INFO L225 Difference]: With dead ends: 2220 [2021-06-05 13:55:08,415 INFO L226 Difference]: Without dead ends: 2216 [2021-06-05 13:55:08,415 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 105.4ms TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:55:08,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2216 states. [2021-06-05 13:55:08,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2216 to 2065. [2021-06-05 13:55:08,434 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 13:55:08,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 5994 transitions. [2021-06-05 13:55:08,437 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 5994 transitions. Word has length 20 [2021-06-05 13:55:08,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:08,437 INFO L482 AbstractCegarLoop]: Abstraction has 2065 states and 5994 transitions. [2021-06-05 13:55:08,437 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 13:55:08,438 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 5994 transitions. [2021-06-05 13:55:08,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:55:08,439 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:08,439 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:08,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable586 [2021-06-05 13:55:08,640 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:08,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:08,640 INFO L82 PathProgramCache]: Analyzing trace with hash -643872091, now seen corresponding path program 145 times [2021-06-05 13:55:08,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:08,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670144276] [2021-06-05 13:55:08,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:08,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:08,707 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 13:55:08,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:08,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670144276] [2021-06-05 13:55:08,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670144276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:08,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118381467] [2021-06-05 13:55:08,708 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 13:55:08,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:08,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:55:08,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:08,772 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 13:55:08,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118381467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:08,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:08,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 12 [2021-06-05 13:55:08,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067572395] [2021-06-05 13:55:08,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:55:08,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:08,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:55:08,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:55:08,773 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 13:55:08,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:08,922 INFO L93 Difference]: Finished difference Result 2259 states and 6407 transitions. [2021-06-05 13:55:08,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:55:08,922 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 13:55:08,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:08,926 INFO L225 Difference]: With dead ends: 2259 [2021-06-05 13:55:08,926 INFO L226 Difference]: Without dead ends: 2253 [2021-06-05 13:55:08,926 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 121.1ms TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:55:08,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2253 states. [2021-06-05 13:55:08,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2253 to 2076. [2021-06-05 13:55:08,953 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 13:55:08,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 6021 transitions. [2021-06-05 13:55:08,957 INFO L78 Accepts]: Start accepts. Automaton has 2076 states and 6021 transitions. Word has length 20 [2021-06-05 13:55:08,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:08,957 INFO L482 AbstractCegarLoop]: Abstraction has 2076 states and 6021 transitions. [2021-06-05 13:55:08,958 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 13:55:08,958 INFO L276 IsEmpty]: Start isEmpty. Operand 2076 states and 6021 transitions. [2021-06-05 13:55:08,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:55:08,960 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:08,960 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:09,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable587 [2021-06-05 13:55:09,173 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:09,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:09,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1340924973, now seen corresponding path program 146 times [2021-06-05 13:55:09,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:09,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554041261] [2021-06-05 13:55:09,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:09,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:09,252 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 13:55:09,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:09,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554041261] [2021-06-05 13:55:09,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554041261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:09,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320829046] [2021-06-05 13:55:09,252 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 13:55:09,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:55:09,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:09,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:55:09,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:09,318 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 13:55:09,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320829046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:09,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:09,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 12 [2021-06-05 13:55:09,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370931422] [2021-06-05 13:55:09,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:55:09,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:09,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:55:09,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:55:09,320 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 13:55:09,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:09,471 INFO L93 Difference]: Finished difference Result 2223 states and 6260 transitions. [2021-06-05 13:55:09,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:55:09,471 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 13:55:09,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:09,474 INFO L225 Difference]: With dead ends: 2223 [2021-06-05 13:55:09,474 INFO L226 Difference]: Without dead ends: 2214 [2021-06-05 13:55:09,474 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 131.2ms TimeCoverageRelationStatistics Valid=151, Invalid=311, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:55:09,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2214 states. [2021-06-05 13:55:09,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2214 to 2064. [2021-06-05 13:55:09,491 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 13:55:09,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 5986 transitions. [2021-06-05 13:55:09,494 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 5986 transitions. Word has length 20 [2021-06-05 13:55:09,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:09,494 INFO L482 AbstractCegarLoop]: Abstraction has 2064 states and 5986 transitions. [2021-06-05 13:55:09,494 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 13:55:09,494 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 5986 transitions. [2021-06-05 13:55:09,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:55:09,496 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:09,496 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:09,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable588,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:09,697 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:09,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:09,697 INFO L82 PathProgramCache]: Analyzing trace with hash 564789647, now seen corresponding path program 147 times [2021-06-05 13:55:09,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:09,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781309666] [2021-06-05 13:55:09,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:09,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:09,752 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 13:55:09,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:09,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781309666] [2021-06-05 13:55:09,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781309666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:09,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543311413] [2021-06-05 13:55:09,752 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 13:55:09,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:55:09,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:09,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:55:09,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:09,814 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 13:55:09,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543311413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:09,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:09,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 13:55:09,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633260765] [2021-06-05 13:55:09,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:55:09,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:09,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:55:09,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:55:09,815 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 13:55:09,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:09,874 INFO L93 Difference]: Finished difference Result 2236 states and 6252 transitions. [2021-06-05 13:55:09,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:55:09,874 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 13:55:09,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:09,876 INFO L225 Difference]: With dead ends: 2236 [2021-06-05 13:55:09,876 INFO L226 Difference]: Without dead ends: 2236 [2021-06-05 13:55:09,876 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 45.5ms TimeCoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:55:09,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2236 states. [2021-06-05 13:55:09,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2236 to 2065. [2021-06-05 13:55:09,902 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 13:55:09,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 5986 transitions. [2021-06-05 13:55:09,906 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 5986 transitions. Word has length 20 [2021-06-05 13:55:09,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:09,906 INFO L482 AbstractCegarLoop]: Abstraction has 2065 states and 5986 transitions. [2021-06-05 13:55:09,906 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 13:55:09,906 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 5986 transitions. [2021-06-05 13:55:09,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:55:09,909 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:09,909 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:10,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable589 [2021-06-05 13:55:10,132 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:10,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:10,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1984722959, now seen corresponding path program 148 times [2021-06-05 13:55:10,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:10,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191129244] [2021-06-05 13:55:10,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:10,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:10,170 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 13:55:10,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:10,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191129244] [2021-06-05 13:55:10,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191129244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:10,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101740088] [2021-06-05 13:55:10,170 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 13:55:10,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:55:10,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:10,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:55:10,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:10,231 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 13:55:10,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101740088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:10,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:10,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-05 13:55:10,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085030648] [2021-06-05 13:55:10,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:55:10,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:10,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:55:10,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:55:10,232 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 13:55:10,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:10,302 INFO L93 Difference]: Finished difference Result 2263 states and 6281 transitions. [2021-06-05 13:55:10,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:55:10,302 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 13:55:10,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:10,304 INFO L225 Difference]: With dead ends: 2263 [2021-06-05 13:55:10,304 INFO L226 Difference]: Without dead ends: 2262 [2021-06-05 13:55:10,304 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 55.3ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:55:10,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2021-06-05 13:55:10,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 2069. [2021-06-05 13:55:10,322 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 13:55:10,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2069 states to 2069 states and 5991 transitions. [2021-06-05 13:55:10,325 INFO L78 Accepts]: Start accepts. Automaton has 2069 states and 5991 transitions. Word has length 20 [2021-06-05 13:55:10,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:10,325 INFO L482 AbstractCegarLoop]: Abstraction has 2069 states and 5991 transitions. [2021-06-05 13:55:10,325 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 13:55:10,325 INFO L276 IsEmpty]: Start isEmpty. Operand 2069 states and 5991 transitions. [2021-06-05 13:55:10,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:55:10,327 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:10,327 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:10,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable590 [2021-06-05 13:55:10,529 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:10,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:10,529 INFO L82 PathProgramCache]: Analyzing trace with hash -274109651, now seen corresponding path program 149 times [2021-06-05 13:55:10,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:10,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135815813] [2021-06-05 13:55:10,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:10,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:10,573 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 13:55:10,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:10,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135815813] [2021-06-05 13:55:10,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135815813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:10,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513645039] [2021-06-05 13:55:10,573 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 13:55:10,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:55:10,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:10,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:55:10,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:10,627 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 13:55:10,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513645039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:10,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:10,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 11 [2021-06-05 13:55:10,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392846679] [2021-06-05 13:55:10,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:55:10,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:10,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:55:10,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:55:10,628 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 13:55:10,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:10,745 INFO L93 Difference]: Finished difference Result 2229 states and 6208 transitions. [2021-06-05 13:55:10,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:55:10,745 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 13:55:10,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:10,748 INFO L225 Difference]: With dead ends: 2229 [2021-06-05 13:55:10,748 INFO L226 Difference]: Without dead ends: 2225 [2021-06-05 13:55:10,748 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 82.3ms TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:55:10,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2021-06-05 13:55:10,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 2054. [2021-06-05 13:55:10,767 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 13:55:10,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2054 states to 2054 states and 5936 transitions. [2021-06-05 13:55:10,807 INFO L78 Accepts]: Start accepts. Automaton has 2054 states and 5936 transitions. Word has length 20 [2021-06-05 13:55:10,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:10,807 INFO L482 AbstractCegarLoop]: Abstraction has 2054 states and 5936 transitions. [2021-06-05 13:55:10,808 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 13:55:10,808 INFO L276 IsEmpty]: Start isEmpty. Operand 2054 states and 5936 transitions. [2021-06-05 13:55:10,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:55:10,810 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:10,810 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:11,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:11,015 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:11,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:11,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1215295345, now seen corresponding path program 150 times [2021-06-05 13:55:11,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:11,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384795359] [2021-06-05 13:55:11,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:11,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:11,062 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 13:55:11,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:11,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384795359] [2021-06-05 13:55:11,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384795359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:11,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384928287] [2021-06-05 13:55:11,062 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 13:55:11,086 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:55:11,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:11,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:55:11,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:11,122 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 13:55:11,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384928287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:11,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:11,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 13:55:11,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748510473] [2021-06-05 13:55:11,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:55:11,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:11,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:55:11,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:55:11,123 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 13:55:11,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:11,257 INFO L93 Difference]: Finished difference Result 2217 states and 6160 transitions. [2021-06-05 13:55:11,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:55:11,258 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 13:55:11,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:11,260 INFO L225 Difference]: With dead ends: 2217 [2021-06-05 13:55:11,260 INFO L226 Difference]: Without dead ends: 2211 [2021-06-05 13:55:11,260 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 97.8ms TimeCoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:55:11,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2211 states. [2021-06-05 13:55:11,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2211 to 2046. [2021-06-05 13:55:11,278 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 13:55:11,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2046 states to 2046 states and 5906 transitions. [2021-06-05 13:55:11,281 INFO L78 Accepts]: Start accepts. Automaton has 2046 states and 5906 transitions. Word has length 20 [2021-06-05 13:55:11,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:11,281 INFO L482 AbstractCegarLoop]: Abstraction has 2046 states and 5906 transitions. [2021-06-05 13:55:11,281 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 13:55:11,281 INFO L276 IsEmpty]: Start isEmpty. Operand 2046 states and 5906 transitions. [2021-06-05 13:55:11,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:55:11,283 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:11,283 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:11,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:11,483 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:11,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:11,484 INFO L82 PathProgramCache]: Analyzing trace with hash 142209965, now seen corresponding path program 151 times [2021-06-05 13:55:11,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:11,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953458528] [2021-06-05 13:55:11,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:11,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:11,537 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 13:55:11,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:11,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953458528] [2021-06-05 13:55:11,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953458528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:11,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65794426] [2021-06-05 13:55:11,537 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 13:55:11,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:11,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:55:11,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:11,595 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 13:55:11,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65794426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:11,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:11,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-06-05 13:55:11,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061110447] [2021-06-05 13:55:11,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:55:11,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:11,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:55:11,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:55:11,595 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 13:55:11,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:11,743 INFO L93 Difference]: Finished difference Result 2213 states and 6136 transitions. [2021-06-05 13:55:11,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:55:11,744 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 13:55:11,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:11,746 INFO L225 Difference]: With dead ends: 2213 [2021-06-05 13:55:11,746 INFO L226 Difference]: Without dead ends: 2207 [2021-06-05 13:55:11,746 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 118.0ms TimeCoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:55:11,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2207 states. [2021-06-05 13:55:11,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2207 to 2047. [2021-06-05 13:55:11,765 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 13:55:11,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2047 states to 2047 states and 5900 transitions. [2021-06-05 13:55:11,768 INFO L78 Accepts]: Start accepts. Automaton has 2047 states and 5900 transitions. Word has length 20 [2021-06-05 13:55:11,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:11,768 INFO L482 AbstractCegarLoop]: Abstraction has 2047 states and 5900 transitions. [2021-06-05 13:55:11,768 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 13:55:11,768 INFO L276 IsEmpty]: Start isEmpty. Operand 2047 states and 5900 transitions. [2021-06-05 13:55:11,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:55:11,770 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:11,770 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:11,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable593,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:11,970 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:11,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:11,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1236301553, now seen corresponding path program 152 times [2021-06-05 13:55:11,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:11,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716869068] [2021-06-05 13:55:11,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:11,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:12,039 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 13:55:12,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:12,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716869068] [2021-06-05 13:55:12,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716869068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:12,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404963737] [2021-06-05 13:55:12,039 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 13:55:12,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:55:12,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:12,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:55:12,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:12,115 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 13:55:12,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404963737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:12,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:12,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-06-05 13:55:12,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584454594] [2021-06-05 13:55:12,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:55:12,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:12,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:55:12,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:55:12,116 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 13:55:12,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:12,291 INFO L93 Difference]: Finished difference Result 2421 states and 6711 transitions. [2021-06-05 13:55:12,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:55:12,291 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 13:55:12,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:12,294 INFO L225 Difference]: With dead ends: 2421 [2021-06-05 13:55:12,294 INFO L226 Difference]: Without dead ends: 2413 [2021-06-05 13:55:12,294 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 148.2ms TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:55:12,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2413 states. [2021-06-05 13:55:12,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2413 to 2084. [2021-06-05 13:55:12,316 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 13:55:12,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2084 states to 2084 states and 6008 transitions. [2021-06-05 13:55:12,319 INFO L78 Accepts]: Start accepts. Automaton has 2084 states and 6008 transitions. Word has length 20 [2021-06-05 13:55:12,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:12,319 INFO L482 AbstractCegarLoop]: Abstraction has 2084 states and 6008 transitions. [2021-06-05 13:55:12,319 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 13:55:12,319 INFO L276 IsEmpty]: Start isEmpty. Operand 2084 states and 6008 transitions. [2021-06-05 13:55:12,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:55:12,321 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:12,321 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:12,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable594,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:12,521 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:12,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:12,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1102498691, now seen corresponding path program 153 times [2021-06-05 13:55:12,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:12,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109106767] [2021-06-05 13:55:12,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:12,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:12,585 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 13:55:12,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:12,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109106767] [2021-06-05 13:55:12,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109106767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:12,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950414935] [2021-06-05 13:55:12,585 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 13:55:12,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:55:12,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:12,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:55:12,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:12,657 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 13:55:12,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950414935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:12,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:12,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:55:12,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207889696] [2021-06-05 13:55:12,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:55:12,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:12,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:55:12,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:55:12,658 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 13:55:12,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:12,793 INFO L93 Difference]: Finished difference Result 2248 states and 6298 transitions. [2021-06-05 13:55:12,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:55:12,793 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 13:55:12,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:12,795 INFO L225 Difference]: With dead ends: 2248 [2021-06-05 13:55:12,795 INFO L226 Difference]: Without dead ends: 2240 [2021-06-05 13:55:12,796 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 115.1ms TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:55:12,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2240 states. [2021-06-05 13:55:12,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2240 to 2079. [2021-06-05 13:55:12,814 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 13:55:12,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2079 states to 2079 states and 5988 transitions. [2021-06-05 13:55:12,817 INFO L78 Accepts]: Start accepts. Automaton has 2079 states and 5988 transitions. Word has length 20 [2021-06-05 13:55:12,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:12,817 INFO L482 AbstractCegarLoop]: Abstraction has 2079 states and 5988 transitions. [2021-06-05 13:55:12,817 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 13:55:12,817 INFO L276 IsEmpty]: Start isEmpty. Operand 2079 states and 5988 transitions. [2021-06-05 13:55:12,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:55:12,819 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:12,819 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:13,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable595 [2021-06-05 13:55:13,019 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:13,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:13,020 INFO L82 PathProgramCache]: Analyzing trace with hash -836470393, now seen corresponding path program 154 times [2021-06-05 13:55:13,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:13,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642079493] [2021-06-05 13:55:13,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:13,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:13,060 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 13:55:13,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:13,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642079493] [2021-06-05 13:55:13,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642079493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:13,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168162842] [2021-06-05 13:55:13,061 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 13:55:13,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:55:13,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:13,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:55:13,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:13,120 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 13:55:13,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168162842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:13,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:13,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 13:55:13,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248595253] [2021-06-05 13:55:13,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:55:13,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:13,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:55:13,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:55:13,121 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 13:55:13,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:13,169 INFO L93 Difference]: Finished difference Result 2261 states and 6260 transitions. [2021-06-05 13:55:13,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:55:13,170 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 13:55:13,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:13,172 INFO L225 Difference]: With dead ends: 2261 [2021-06-05 13:55:13,172 INFO L226 Difference]: Without dead ends: 2259 [2021-06-05 13:55:13,172 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 41.5ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:55:13,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2259 states. [2021-06-05 13:55:13,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2259 to 2075. [2021-06-05 13:55:13,190 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 13:55:13,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2075 states to 2075 states and 5974 transitions. [2021-06-05 13:55:13,193 INFO L78 Accepts]: Start accepts. Automaton has 2075 states and 5974 transitions. Word has length 20 [2021-06-05 13:55:13,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:13,193 INFO L482 AbstractCegarLoop]: Abstraction has 2075 states and 5974 transitions. [2021-06-05 13:55:13,193 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 13:55:13,193 INFO L276 IsEmpty]: Start isEmpty. Operand 2075 states and 5974 transitions. [2021-06-05 13:55:13,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:55:13,195 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:13,195 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:13,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable596,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:13,395 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:13,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:13,395 INFO L82 PathProgramCache]: Analyzing trace with hash 908984297, now seen corresponding path program 155 times [2021-06-05 13:55:13,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:13,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113391140] [2021-06-05 13:55:13,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:13,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:13,437 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 13:55:13,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:13,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113391140] [2021-06-05 13:55:13,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113391140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:13,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527517539] [2021-06-05 13:55:13,437 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 13:55:13,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:55:13,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:13,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:55:13,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:13,502 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 13:55:13,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527517539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:13,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:13,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-05 13:55:13,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417727313] [2021-06-05 13:55:13,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:55:13,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:13,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:55:13,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:55:13,503 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 13:55:13,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:13,559 INFO L93 Difference]: Finished difference Result 2242 states and 6197 transitions. [2021-06-05 13:55:13,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:55:13,560 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 13:55:13,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:13,562 INFO L225 Difference]: With dead ends: 2242 [2021-06-05 13:55:13,562 INFO L226 Difference]: Without dead ends: 2242 [2021-06-05 13:55:13,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 48.1ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:55:13,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2021-06-05 13:55:13,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 2065. [2021-06-05 13:55:13,582 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 13:55:13,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 5933 transitions. [2021-06-05 13:55:13,585 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 5933 transitions. Word has length 20 [2021-06-05 13:55:13,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:13,585 INFO L482 AbstractCegarLoop]: Abstraction has 2065 states and 5933 transitions. [2021-06-05 13:55:13,585 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 13:55:13,585 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 5933 transitions. [2021-06-05 13:55:13,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:55:13,586 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:13,586 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:13,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable597 [2021-06-05 13:55:13,787 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:13,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:13,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1675369691, now seen corresponding path program 156 times [2021-06-05 13:55:13,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:13,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560800738] [2021-06-05 13:55:13,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:13,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:13,834 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 13:55:13,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:13,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560800738] [2021-06-05 13:55:13,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560800738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:13,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786072567] [2021-06-05 13:55:13,835 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 13:55:13,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:55:13,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:13,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:55:13,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:13,903 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 13:55:13,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786072567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:13,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:13,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 13:55:13,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443717821] [2021-06-05 13:55:13,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:55:13,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:13,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:55:13,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:55:13,904 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 13:55:14,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:14,025 INFO L93 Difference]: Finished difference Result 2234 states and 6164 transitions. [2021-06-05 13:55:14,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:55:14,025 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 13:55:14,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:14,028 INFO L225 Difference]: With dead ends: 2234 [2021-06-05 13:55:14,028 INFO L226 Difference]: Without dead ends: 2231 [2021-06-05 13:55:14,028 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 81.8ms TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:55:14,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2231 states. [2021-06-05 13:55:14,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2231 to 2055. [2021-06-05 13:55:14,049 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 13:55:14,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 5893 transitions. [2021-06-05 13:55:14,052 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 5893 transitions. Word has length 20 [2021-06-05 13:55:14,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:14,052 INFO L482 AbstractCegarLoop]: Abstraction has 2055 states and 5893 transitions. [2021-06-05 13:55:14,052 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 13:55:14,052 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 5893 transitions. [2021-06-05 13:55:14,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:55:14,054 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:14,054 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:14,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-06-05 13:55:14,255 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:14,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:14,255 INFO L82 PathProgramCache]: Analyzing trace with hash -185964695, now seen corresponding path program 157 times [2021-06-05 13:55:14,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:14,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008174565] [2021-06-05 13:55:14,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:14,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:14,310 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 13:55:14,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:14,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008174565] [2021-06-05 13:55:14,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008174565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:14,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243180716] [2021-06-05 13:55:14,311 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 13:55:14,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:14,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:55:14,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:14,391 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 13:55:14,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243180716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:14,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:14,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 12 [2021-06-05 13:55:14,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585864778] [2021-06-05 13:55:14,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:55:14,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:14,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:55:14,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:55:14,392 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 13:55:14,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:14,511 INFO L93 Difference]: Finished difference Result 2228 states and 6131 transitions. [2021-06-05 13:55:14,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:55:14,512 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 13:55:14,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:14,514 INFO L225 Difference]: With dead ends: 2228 [2021-06-05 13:55:14,514 INFO L226 Difference]: Without dead ends: 2224 [2021-06-05 13:55:14,514 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 95.6ms TimeCoverageRelationStatistics Valid=140, Invalid=280, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:55:14,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2224 states. [2021-06-05 13:55:14,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2224 to 2055. [2021-06-05 13:55:14,533 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 13:55:14,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 5880 transitions. [2021-06-05 13:55:14,536 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 5880 transitions. Word has length 20 [2021-06-05 13:55:14,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:14,536 INFO L482 AbstractCegarLoop]: Abstraction has 2055 states and 5880 transitions. [2021-06-05 13:55:14,536 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 13:55:14,536 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 5880 transitions. [2021-06-05 13:55:14,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:55:14,538 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:14,538 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:14,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable599 [2021-06-05 13:55:14,739 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:14,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:14,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1259050075, now seen corresponding path program 158 times [2021-06-05 13:55:14,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:14,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337317654] [2021-06-05 13:55:14,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:14,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:14,795 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 13:55:14,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:14,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337317654] [2021-06-05 13:55:14,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337317654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:14,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997316969] [2021-06-05 13:55:14,795 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 13:55:14,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:55:14,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:14,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:55:14,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:14,849 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 13:55:14,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997316969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:14,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:14,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 12 [2021-06-05 13:55:14,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22746056] [2021-06-05 13:55:14,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:55:14,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:14,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:55:14,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:55:14,850 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 13:55:14,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:14,968 INFO L93 Difference]: Finished difference Result 2691 states and 7378 transitions. [2021-06-05 13:55:14,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:55:14,969 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 13:55:14,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:14,971 INFO L225 Difference]: With dead ends: 2691 [2021-06-05 13:55:14,972 INFO L226 Difference]: Without dead ends: 2685 [2021-06-05 13:55:14,972 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 96.2ms TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:55:14,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2685 states. [2021-06-05 13:55:14,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2685 to 2055. [2021-06-05 13:55:14,991 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 13:55:14,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 5877 transitions. [2021-06-05 13:55:14,994 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 5877 transitions. Word has length 20 [2021-06-05 13:55:14,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:14,994 INFO L482 AbstractCegarLoop]: Abstraction has 2055 states and 5877 transitions. [2021-06-05 13:55:14,994 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 13:55:14,994 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 5877 transitions. [2021-06-05 13:55:14,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:55:14,996 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:14,996 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:15,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable600,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:15,196 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:15,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:15,197 INFO L82 PathProgramCache]: Analyzing trace with hash -164958487, now seen corresponding path program 159 times [2021-06-05 13:55:15,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:15,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253358214] [2021-06-05 13:55:15,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:15,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:15,270 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 13:55:15,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:15,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253358214] [2021-06-05 13:55:15,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253358214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:15,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556802804] [2021-06-05 13:55:15,271 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 13:55:15,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:55:15,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:15,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:55:15,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:15,325 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 13:55:15,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556802804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:15,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:15,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:55:15,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975473785] [2021-06-05 13:55:15,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:55:15,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:15,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:55:15,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:55:15,326 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 13:55:15,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:15,462 INFO L93 Difference]: Finished difference Result 2703 states and 7388 transitions. [2021-06-05 13:55:15,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:55:15,462 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 13:55:15,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:15,465 INFO L225 Difference]: With dead ends: 2703 [2021-06-05 13:55:15,465 INFO L226 Difference]: Without dead ends: 2695 [2021-06-05 13:55:15,465 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 113.8ms TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:55:15,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2695 states. [2021-06-05 13:55:15,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2695 to 2065. [2021-06-05 13:55:15,484 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 13:55:15,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 5908 transitions. [2021-06-05 13:55:15,487 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 5908 transitions. Word has length 20 [2021-06-05 13:55:15,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:15,487 INFO L482 AbstractCegarLoop]: Abstraction has 2065 states and 5908 transitions. [2021-06-05 13:55:15,487 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 13:55:15,487 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 5908 transitions. [2021-06-05 13:55:15,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:55:15,489 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:15,489 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:15,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable601 [2021-06-05 13:55:15,690 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:15,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:15,690 INFO L82 PathProgramCache]: Analyzing trace with hash -607857627, now seen corresponding path program 160 times [2021-06-05 13:55:15,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:15,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173298509] [2021-06-05 13:55:15,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:15,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:15,763 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 13:55:15,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:15,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173298509] [2021-06-05 13:55:15,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173298509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:15,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087561390] [2021-06-05 13:55:15,764 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 13:55:15,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:55:15,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:15,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:55:15,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:15,816 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 13:55:15,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087561390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:15,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:15,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-06-05 13:55:15,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946847915] [2021-06-05 13:55:15,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:55:15,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:15,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:55:15,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:55:15,817 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 13:55:15,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:15,980 INFO L93 Difference]: Finished difference Result 2452 states and 6775 transitions. [2021-06-05 13:55:15,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:55:15,980 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 13:55:15,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:15,983 INFO L225 Difference]: With dead ends: 2452 [2021-06-05 13:55:15,983 INFO L226 Difference]: Without dead ends: 2442 [2021-06-05 13:55:15,983 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 136.0ms TimeCoverageRelationStatistics Valid=192, Invalid=408, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:55:15,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2021-06-05 13:55:15,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 2065. [2021-06-05 13:55:16,000 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 13:55:16,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 5906 transitions. [2021-06-05 13:55:16,003 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 5906 transitions. Word has length 20 [2021-06-05 13:55:16,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:16,003 INFO L482 AbstractCegarLoop]: Abstraction has 2065 states and 5906 transitions. [2021-06-05 13:55:16,003 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 13:55:16,003 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 5906 transitions. [2021-06-05 13:55:16,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:55:16,005 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:16,005 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:16,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable602,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:16,206 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:16,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:16,206 INFO L82 PathProgramCache]: Analyzing trace with hash 130741455, now seen corresponding path program 161 times [2021-06-05 13:55:16,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:16,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805527782] [2021-06-05 13:55:16,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:16,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:16,266 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 13:55:16,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:16,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805527782] [2021-06-05 13:55:16,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805527782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:16,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966334250] [2021-06-05 13:55:16,267 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 13:55:16,291 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:55:16,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:16,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:55:16,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:16,343 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 13:55:16,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966334250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:16,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:16,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-06-05 13:55:16,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251021871] [2021-06-05 13:55:16,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:55:16,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:16,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:55:16,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:55:16,344 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 13:55:16,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:16,465 INFO L93 Difference]: Finished difference Result 2203 states and 6075 transitions. [2021-06-05 13:55:16,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:55:16,466 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 13:55:16,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:16,468 INFO L225 Difference]: With dead ends: 2203 [2021-06-05 13:55:16,468 INFO L226 Difference]: Without dead ends: 2199 [2021-06-05 13:55:16,468 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 121.1ms TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:55:16,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-06-05 13:55:16,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 2018. [2021-06-05 13:55:16,489 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 13:55:16,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2018 states to 2018 states and 5750 transitions. [2021-06-05 13:55:16,492 INFO L78 Accepts]: Start accepts. Automaton has 2018 states and 5750 transitions. Word has length 20 [2021-06-05 13:55:16,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:16,492 INFO L482 AbstractCegarLoop]: Abstraction has 2018 states and 5750 transitions. [2021-06-05 13:55:16,492 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 13:55:16,492 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states and 5750 transitions. [2021-06-05 13:55:16,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:55:16,494 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:16,494 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:16,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable603,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:16,694 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:16,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:16,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1438631789, now seen corresponding path program 162 times [2021-06-05 13:55:16,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:16,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890423938] [2021-06-05 13:55:16,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:16,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:16,748 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 13:55:16,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:16,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890423938] [2021-06-05 13:55:16,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890423938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:16,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90838854] [2021-06-05 13:55:16,749 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 13:55:16,773 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:55:16,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:16,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:55:16,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:16,814 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 13:55:16,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90838854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:16,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:16,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:55:16,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489607913] [2021-06-05 13:55:16,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:55:16,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:16,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:55:16,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:55:16,815 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 13:55:16,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:16,951 INFO L93 Difference]: Finished difference Result 2240 states and 6144 transitions. [2021-06-05 13:55:16,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:55:16,951 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 13:55:16,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:16,954 INFO L225 Difference]: With dead ends: 2240 [2021-06-05 13:55:16,954 INFO L226 Difference]: Without dead ends: 2231 [2021-06-05 13:55:16,954 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 102.6ms TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:55:16,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2231 states. [2021-06-05 13:55:16,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2231 to 2011. [2021-06-05 13:55:16,979 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 13:55:16,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2011 states to 2011 states and 5721 transitions. [2021-06-05 13:55:16,982 INFO L78 Accepts]: Start accepts. Automaton has 2011 states and 5721 transitions. Word has length 20 [2021-06-05 13:55:16,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:16,982 INFO L482 AbstractCegarLoop]: Abstraction has 2011 states and 5721 transitions. [2021-06-05 13:55:16,982 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 13:55:16,982 INFO L276 IsEmpty]: Start isEmpty. Operand 2011 states and 5721 transitions. [2021-06-05 13:55:16,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:55:16,984 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:16,984 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:17,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable604 [2021-06-05 13:55:17,201 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:17,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:17,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1762243919, now seen corresponding path program 163 times [2021-06-05 13:55:17,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:17,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710272484] [2021-06-05 13:55:17,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:17,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:17,262 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 13:55:17,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:17,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710272484] [2021-06-05 13:55:17,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710272484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:17,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575753806] [2021-06-05 13:55:17,262 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 13:55:17,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:17,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:55:17,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:17,313 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 13:55:17,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575753806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:17,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:17,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-06-05 13:55:17,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335621144] [2021-06-05 13:55:17,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:55:17,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:17,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:55:17,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:55:17,314 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 13:55:17,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:17,479 INFO L93 Difference]: Finished difference Result 2239 states and 6126 transitions. [2021-06-05 13:55:17,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:55:17,479 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 13:55:17,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:17,483 INFO L225 Difference]: With dead ends: 2239 [2021-06-05 13:55:17,483 INFO L226 Difference]: Without dead ends: 2231 [2021-06-05 13:55:17,483 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 120.3ms TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:55:17,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2231 states. [2021-06-05 13:55:17,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2231 to 2024. [2021-06-05 13:55:17,510 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 13:55:17,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 5750 transitions. [2021-06-05 13:55:17,514 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 5750 transitions. Word has length 20 [2021-06-05 13:55:17,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:17,514 INFO L482 AbstractCegarLoop]: Abstraction has 2024 states and 5750 transitions. [2021-06-05 13:55:17,514 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 13:55:17,514 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 5750 transitions. [2021-06-05 13:55:17,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:55:17,517 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:17,517 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:17,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable605,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:17,733 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:17,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:17,733 INFO L82 PathProgramCache]: Analyzing trace with hash 2089824237, now seen corresponding path program 164 times [2021-06-05 13:55:17,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:17,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969299027] [2021-06-05 13:55:17,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:17,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:17,797 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 13:55:17,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:17,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969299027] [2021-06-05 13:55:17,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969299027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:17,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259886458] [2021-06-05 13:55:17,797 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 13:55:17,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:55:17,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:17,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:55:17,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:17,875 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 13:55:17,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259886458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:17,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:17,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-06-05 13:55:17,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572250095] [2021-06-05 13:55:17,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:55:17,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:17,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:55:17,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:55:17,876 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 13:55:18,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:18,017 INFO L93 Difference]: Finished difference Result 2477 states and 6771 transitions. [2021-06-05 13:55:18,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:55:18,018 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 13:55:18,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:18,020 INFO L225 Difference]: With dead ends: 2477 [2021-06-05 13:55:18,020 INFO L226 Difference]: Without dead ends: 2467 [2021-06-05 13:55:18,021 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 131.6ms TimeCoverageRelationStatistics Valid=193, Invalid=407, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:55:18,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2467 states. [2021-06-05 13:55:18,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2467 to 2031. [2021-06-05 13:55:18,038 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 13:55:18,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 5766 transitions. [2021-06-05 13:55:18,041 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 5766 transitions. Word has length 20 [2021-06-05 13:55:18,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:18,041 INFO L482 AbstractCegarLoop]: Abstraction has 2031 states and 5766 transitions. [2021-06-05 13:55:18,041 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 13:55:18,041 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 5766 transitions. [2021-06-05 13:55:18,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:55:18,043 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:18,043 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:18,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable606,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:18,244 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:18,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:18,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1135579185, now seen corresponding path program 165 times [2021-06-05 13:55:18,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:18,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454894938] [2021-06-05 13:55:18,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:18,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:18,291 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 13:55:18,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:18,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454894938] [2021-06-05 13:55:18,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454894938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:18,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542556868] [2021-06-05 13:55:18,291 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 13:55:18,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:55:18,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:18,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:55:18,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:18,352 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 13:55:18,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542556868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:18,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:18,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 13:55:18,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770379858] [2021-06-05 13:55:18,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:55:18,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:18,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:55:18,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:55:18,352 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 13:55:18,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:18,432 INFO L93 Difference]: Finished difference Result 2228 states and 6076 transitions. [2021-06-05 13:55:18,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:55:18,432 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 13:55:18,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:18,435 INFO L225 Difference]: With dead ends: 2228 [2021-06-05 13:55:18,435 INFO L226 Difference]: Without dead ends: 2228 [2021-06-05 13:55:18,435 INFO L777 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 13:55:18,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2228 states. [2021-06-05 13:55:18,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2228 to 2015. [2021-06-05 13:55:18,453 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 13:55:18,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2015 states to 2015 states and 5714 transitions. [2021-06-05 13:55:18,455 INFO L78 Accepts]: Start accepts. Automaton has 2015 states and 5714 transitions. Word has length 20 [2021-06-05 13:55:18,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:18,455 INFO L482 AbstractCegarLoop]: Abstraction has 2015 states and 5714 transitions. [2021-06-05 13:55:18,455 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 13:55:18,455 INFO L276 IsEmpty]: Start isEmpty. Operand 2015 states and 5714 transitions. [2021-06-05 13:55:18,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:55:18,457 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:18,457 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:18,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable607,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:18,658 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:18,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:18,658 INFO L82 PathProgramCache]: Analyzing trace with hash -460779053, now seen corresponding path program 166 times [2021-06-05 13:55:18,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:18,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018042643] [2021-06-05 13:55:18,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:18,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:18,723 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 13:55:18,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:18,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018042643] [2021-06-05 13:55:18,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018042643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:18,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203508176] [2021-06-05 13:55:18,723 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 13:55:18,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:55:18,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:18,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:55:18,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:18,783 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 13:55:18,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203508176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:18,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:18,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-06-05 13:55:18,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982279908] [2021-06-05 13:55:18,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:55:18,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:18,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:55:18,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:55:18,784 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 13:55:18,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:18,939 INFO L93 Difference]: Finished difference Result 2228 states and 6116 transitions. [2021-06-05 13:55:18,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:55:18,940 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 13:55:18,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:18,942 INFO L225 Difference]: With dead ends: 2228 [2021-06-05 13:55:18,942 INFO L226 Difference]: Without dead ends: 2218 [2021-06-05 13:55:18,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 130.8ms TimeCoverageRelationStatistics Valid=192, Invalid=408, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:55:18,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2218 states. [2021-06-05 13:55:18,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2218 to 2010. [2021-06-05 13:55:18,960 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 13:55:18,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2010 states to 2010 states and 5690 transitions. [2021-06-05 13:55:18,962 INFO L78 Accepts]: Start accepts. Automaton has 2010 states and 5690 transitions. Word has length 20 [2021-06-05 13:55:18,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:18,962 INFO L482 AbstractCegarLoop]: Abstraction has 2010 states and 5690 transitions. [2021-06-05 13:55:18,962 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 13:55:18,962 INFO L276 IsEmpty]: Start isEmpty. Operand 2010 states and 5690 transitions. [2021-06-05 13:55:18,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:55:18,964 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:18,964 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:19,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable608,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:19,165 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:19,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:19,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1325858673, now seen corresponding path program 167 times [2021-06-05 13:55:19,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:19,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322185159] [2021-06-05 13:55:19,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:19,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:19,216 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 13:55:19,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:19,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322185159] [2021-06-05 13:55:19,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322185159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:19,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064426439] [2021-06-05 13:55:19,217 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 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 13:55:19,250 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:55:19,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:19,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:55:19,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:19,292 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 13:55:19,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064426439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:19,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:19,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-05 13:55:19,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114292014] [2021-06-05 13:55:19,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:55:19,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:19,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:55:19,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:55:19,293 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 13:55:19,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:19,368 INFO L93 Difference]: Finished difference Result 2251 states and 6063 transitions. [2021-06-05 13:55:19,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:55:19,368 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 13:55:19,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:19,371 INFO L225 Difference]: With dead ends: 2251 [2021-06-05 13:55:19,371 INFO L226 Difference]: Without dead ends: 2251 [2021-06-05 13:55:19,372 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 55.8ms TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:55:19,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2251 states. [2021-06-05 13:55:19,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2251 to 2017. [2021-06-05 13:55:19,400 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 13:55:19,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 5715 transitions. [2021-06-05 13:55:19,404 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 5715 transitions. Word has length 20 [2021-06-05 13:55:19,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:19,404 INFO L482 AbstractCegarLoop]: Abstraction has 2017 states and 5715 transitions. [2021-06-05 13:55:19,404 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 13:55:19,404 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 5715 transitions. [2021-06-05 13:55:19,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:55:19,407 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:19,407 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:19,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable609,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:19,630 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:19,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:19,630 INFO L82 PathProgramCache]: Analyzing trace with hash 2130209325, now seen corresponding path program 168 times [2021-06-05 13:55:19,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:19,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996508009] [2021-06-05 13:55:19,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:19,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:19,738 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 13:55:19,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:19,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996508009] [2021-06-05 13:55:19,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996508009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:19,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899814678] [2021-06-05 13:55:19,738 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 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 13:55:19,770 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:55:19,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:19,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:55:19,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:19,807 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 13:55:19,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899814678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:19,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:19,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 13:55:19,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535870715] [2021-06-05 13:55:19,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:55:19,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:19,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:55:19,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:55:19,808 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 13:55:19,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:19,934 INFO L93 Difference]: Finished difference Result 2206 states and 5970 transitions. [2021-06-05 13:55:19,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:55:19,935 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 13:55:19,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:19,938 INFO L225 Difference]: With dead ends: 2206 [2021-06-05 13:55:19,938 INFO L226 Difference]: Without dead ends: 2204 [2021-06-05 13:55:19,939 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 113.3ms TimeCoverageRelationStatistics Valid=119, Invalid=223, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:55:19,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2204 states. [2021-06-05 13:55:19,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2204 to 2017. [2021-06-05 13:55:19,964 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 13:55:19,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 5709 transitions. [2021-06-05 13:55:19,968 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 5709 transitions. Word has length 20 [2021-06-05 13:55:19,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:19,968 INFO L482 AbstractCegarLoop]: Abstraction has 2017 states and 5709 transitions. [2021-06-05 13:55:19,968 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 13:55:19,968 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 5709 transitions. [2021-06-05 13:55:19,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:55:19,971 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:19,971 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:20,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable610,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:20,191 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:20,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:20,191 INFO L82 PathProgramCache]: Analyzing trace with hash -675352975, now seen corresponding path program 169 times [2021-06-05 13:55:20,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:20,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91582581] [2021-06-05 13:55:20,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:20,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:20,269 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 13:55:20,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:20,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91582581] [2021-06-05 13:55:20,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91582581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:20,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948354335] [2021-06-05 13:55:20,270 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 13:55:20,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:20,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:55:20,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:20,340 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 13:55:20,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948354335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:20,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:20,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2021-06-05 13:55:20,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997010368] [2021-06-05 13:55:20,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:55:20,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:20,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:55:20,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:55:20,341 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 13:55:20,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:20,482 INFO L93 Difference]: Finished difference Result 2212 states and 5972 transitions. [2021-06-05 13:55:20,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:55:20,482 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 13:55:20,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:20,485 INFO L225 Difference]: With dead ends: 2212 [2021-06-05 13:55:20,485 INFO L226 Difference]: Without dead ends: 2208 [2021-06-05 13:55:20,485 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 111.4ms TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:55:20,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2021-06-05 13:55:20,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 2017. [2021-06-05 13:55:20,509 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 13:55:20,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 5697 transitions. [2021-06-05 13:55:20,513 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 5697 transitions. Word has length 20 [2021-06-05 13:55:20,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:20,513 INFO L482 AbstractCegarLoop]: Abstraction has 2017 states and 5697 transitions. [2021-06-05 13:55:20,513 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 13:55:20,513 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 5697 transitions. [2021-06-05 13:55:20,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:55:20,515 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:20,515 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:20,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable611 [2021-06-05 13:55:20,730 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:20,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:20,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1748438355, now seen corresponding path program 170 times [2021-06-05 13:55:20,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:20,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038057943] [2021-06-05 13:55:20,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:20,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:20,822 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 13:55:20,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:20,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038057943] [2021-06-05 13:55:20,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038057943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:20,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174600474] [2021-06-05 13:55:20,823 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 13:55:20,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:55:20,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:20,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:55:20,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:20,894 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 13:55:20,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174600474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:20,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:20,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-06-05 13:55:20,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206118439] [2021-06-05 13:55:20,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:55:20,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:20,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:55:20,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:55:20,896 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 13:55:21,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:21,059 INFO L93 Difference]: Finished difference Result 2220 states and 5971 transitions. [2021-06-05 13:55:21,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:55:21,059 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 13:55:21,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:21,062 INFO L225 Difference]: With dead ends: 2220 [2021-06-05 13:55:21,062 INFO L226 Difference]: Without dead ends: 2214 [2021-06-05 13:55:21,063 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 131.5ms TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:55:21,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2214 states. [2021-06-05 13:55:21,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2214 to 2017. [2021-06-05 13:55:21,091 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 13:55:21,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 5681 transitions. [2021-06-05 13:55:21,095 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 5681 transitions. Word has length 20 [2021-06-05 13:55:21,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:21,095 INFO L482 AbstractCegarLoop]: Abstraction has 2017 states and 5681 transitions. [2021-06-05 13:55:21,095 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 13:55:21,095 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 5681 transitions. [2021-06-05 13:55:21,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:55:21,097 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:21,097 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:21,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable612,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:21,317 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:21,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:21,317 INFO L82 PathProgramCache]: Analyzing trace with hash -654346767, now seen corresponding path program 171 times [2021-06-05 13:55:21,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:21,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143575305] [2021-06-05 13:55:21,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:21,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:21,398 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 13:55:21,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:21,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143575305] [2021-06-05 13:55:21,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143575305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:21,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995779696] [2021-06-05 13:55:21,399 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 13:55:21,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:55:21,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:21,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:55:21,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:21,473 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 13:55:21,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995779696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:21,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:21,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 13:55:21,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980835213] [2021-06-05 13:55:21,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:55:21,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:21,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:55:21,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:55:21,478 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 13:55:21,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:21,670 INFO L93 Difference]: Finished difference Result 2831 states and 7603 transitions. [2021-06-05 13:55:21,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:55:21,671 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 13:55:21,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:21,674 INFO L225 Difference]: With dead ends: 2831 [2021-06-05 13:55:21,674 INFO L226 Difference]: Without dead ends: 2823 [2021-06-05 13:55:21,675 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 143.9ms TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:55:21,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2823 states. [2021-06-05 13:55:21,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2823 to 2036. [2021-06-05 13:55:21,708 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 13:55:21,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2036 states to 2036 states and 5728 transitions. [2021-06-05 13:55:21,712 INFO L78 Accepts]: Start accepts. Automaton has 2036 states and 5728 transitions. Word has length 20 [2021-06-05 13:55:21,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:21,713 INFO L482 AbstractCegarLoop]: Abstraction has 2036 states and 5728 transitions. [2021-06-05 13:55:21,713 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 13:55:21,713 INFO L276 IsEmpty]: Start isEmpty. Operand 2036 states and 5728 transitions. [2021-06-05 13:55:21,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:55:21,715 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:21,715 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:21,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable613 [2021-06-05 13:55:21,936 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:21,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:21,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1097245907, now seen corresponding path program 172 times [2021-06-05 13:55:21,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:21,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066075796] [2021-06-05 13:55:21,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:21,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:22,028 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 13:55:22,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:22,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066075796] [2021-06-05 13:55:22,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066075796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:22,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592605521] [2021-06-05 13:55:22,030 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 13:55:22,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:55:22,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:22,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:55:22,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:22,116 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 13:55:22,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592605521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:22,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:22,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-06-05 13:55:22,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310281598] [2021-06-05 13:55:22,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:55:22,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:22,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:55:22,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:55:22,118 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 13:55:22,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:22,328 INFO L93 Difference]: Finished difference Result 2850 states and 7623 transitions. [2021-06-05 13:55:22,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:55:22,328 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 13:55:22,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:22,332 INFO L225 Difference]: With dead ends: 2850 [2021-06-05 13:55:22,332 INFO L226 Difference]: Without dead ends: 2840 [2021-06-05 13:55:22,332 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 181.0ms TimeCoverageRelationStatistics Valid=209, Invalid=441, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:55:22,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2021-06-05 13:55:22,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 2053. [2021-06-05 13:55:22,363 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 13:55:22,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2053 states to 2053 states and 5770 transitions. [2021-06-05 13:55:22,367 INFO L78 Accepts]: Start accepts. Automaton has 2053 states and 5770 transitions. Word has length 20 [2021-06-05 13:55:22,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:22,367 INFO L482 AbstractCegarLoop]: Abstraction has 2053 states and 5770 transitions. [2021-06-05 13:55:22,367 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 13:55:22,367 INFO L276 IsEmpty]: Start isEmpty. Operand 2053 states and 5770 transitions. [2021-06-05 13:55:22,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:55:22,370 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:22,370 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:22,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable614,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:22,592 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:22,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:22,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1942217359, now seen corresponding path program 173 times [2021-06-05 13:55:22,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:22,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381153944] [2021-06-05 13:55:22,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:22,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:22,731 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 13:55:22,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:22,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381153944] [2021-06-05 13:55:22,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381153944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:22,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584935836] [2021-06-05 13:55:22,732 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 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 13:55:22,805 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:55:22,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:22,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:55:22,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:22,853 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 13:55:22,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584935836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:22,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:22,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-06-05 13:55:22,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84526173] [2021-06-05 13:55:22,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:55:22,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:22,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:55:22,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:55:22,854 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 13:55:23,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:23,115 INFO L93 Difference]: Finished difference Result 2624 states and 7060 transitions. [2021-06-05 13:55:23,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:55:23,115 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 13:55:23,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:23,119 INFO L225 Difference]: With dead ends: 2624 [2021-06-05 13:55:23,119 INFO L226 Difference]: Without dead ends: 2612 [2021-06-05 13:55:23,119 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 250.3ms TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:55:23,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2612 states. [2021-06-05 13:55:23,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2612 to 2055. [2021-06-05 13:55:23,149 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 13:55:23,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 5770 transitions. [2021-06-05 13:55:23,153 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 5770 transitions. Word has length 20 [2021-06-05 13:55:23,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:23,153 INFO L482 AbstractCegarLoop]: Abstraction has 2055 states and 5770 transitions. [2021-06-05 13:55:23,153 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 13:55:23,153 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 5770 transitions. [2021-06-05 13:55:23,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:55:23,156 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:23,156 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:23,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable615,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:23,369 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:23,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:23,370 INFO L82 PathProgramCache]: Analyzing trace with hash -2140466681, now seen corresponding path program 174 times [2021-06-05 13:55:23,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:23,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246566618] [2021-06-05 13:55:23,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:23,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:23,449 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 13:55:23,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:23,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246566618] [2021-06-05 13:55:23,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246566618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:23,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804269978] [2021-06-05 13:55:23,449 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 13:55:23,480 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:55:23,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:23,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:55:23,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:23,528 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 13:55:23,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804269978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:23,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:23,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-06-05 13:55:23,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638820315] [2021-06-05 13:55:23,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:55:23,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:23,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:55:23,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:55:23,529 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 13:55:23,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:23,681 INFO L93 Difference]: Finished difference Result 2268 states and 6139 transitions. [2021-06-05 13:55:23,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:55:23,682 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 13:55:23,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:23,684 INFO L225 Difference]: With dead ends: 2268 [2021-06-05 13:55:23,685 INFO L226 Difference]: Without dead ends: 2264 [2021-06-05 13:55:23,685 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 134.6ms TimeCoverageRelationStatistics Valid=154, Invalid=308, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:55:23,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-06-05 13:55:23,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 2086. [2021-06-05 13:55:23,712 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 13:55:23,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2086 states to 2086 states and 5866 transitions. [2021-06-05 13:55:23,716 INFO L78 Accepts]: Start accepts. Automaton has 2086 states and 5866 transitions. Word has length 20 [2021-06-05 13:55:23,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:23,717 INFO L482 AbstractCegarLoop]: Abstraction has 2086 states and 5866 transitions. [2021-06-05 13:55:23,717 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 13:55:23,717 INFO L276 IsEmpty]: Start isEmpty. Operand 2086 states and 5866 transitions. [2021-06-05 13:55:23,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:55:23,719 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:23,719 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:23,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable616 [2021-06-05 13:55:23,941 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:23,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:23,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1369412393, now seen corresponding path program 175 times [2021-06-05 13:55:23,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:23,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021218922] [2021-06-05 13:55:23,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:23,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:24,061 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 13:55:24,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:24,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021218922] [2021-06-05 13:55:24,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021218922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:24,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712429788] [2021-06-05 13:55:24,062 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 13:55:24,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:24,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:55:24,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:24,217 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 13:55:24,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712429788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:24,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:24,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 14 [2021-06-05 13:55:24,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413610450] [2021-06-05 13:55:24,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:55:24,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:24,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:55:24,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:55:24,218 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 13:55:24,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:24,441 INFO L93 Difference]: Finished difference Result 2348 states and 6353 transitions. [2021-06-05 13:55:24,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:55:24,442 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 13:55:24,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:24,445 INFO L225 Difference]: With dead ends: 2348 [2021-06-05 13:55:24,445 INFO L226 Difference]: Without dead ends: 2340 [2021-06-05 13:55:24,445 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 222.3ms TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:55:24,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2340 states. [2021-06-05 13:55:24,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2340 to 2086. [2021-06-05 13:55:24,479 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 13:55:24,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2086 states to 2086 states and 5858 transitions. [2021-06-05 13:55:24,484 INFO L78 Accepts]: Start accepts. Automaton has 2086 states and 5858 transitions. Word has length 20 [2021-06-05 13:55:24,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:24,484 INFO L482 AbstractCegarLoop]: Abstraction has 2086 states and 5858 transitions. [2021-06-05 13:55:24,484 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 13:55:24,485 INFO L276 IsEmpty]: Start isEmpty. Operand 2086 states and 5858 transitions. [2021-06-05 13:55:24,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:55:24,487 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:24,487 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:24,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable617,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:24,708 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:24,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:24,709 INFO L82 PathProgramCache]: Analyzing trace with hash 926513253, now seen corresponding path program 176 times [2021-06-05 13:55:24,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:24,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446708411] [2021-06-05 13:55:24,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:24,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:24,788 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 13:55:24,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:24,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446708411] [2021-06-05 13:55:24,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446708411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:24,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736952072] [2021-06-05 13:55:24,789 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 13:55:24,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:55:24,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:24,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:55:24,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:24,877 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 13:55:24,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736952072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:24,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:24,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 15 [2021-06-05 13:55:24,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431815167] [2021-06-05 13:55:24,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:55:24,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:24,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:55:24,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:55:24,878 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 13:55:25,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:25,052 INFO L93 Difference]: Finished difference Result 2366 states and 6371 transitions. [2021-06-05 13:55:25,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:55:25,052 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 13:55:25,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:25,056 INFO L225 Difference]: With dead ends: 2366 [2021-06-05 13:55:25,056 INFO L226 Difference]: Without dead ends: 2356 [2021-06-05 13:55:25,056 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 166.0ms TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:55:25,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2356 states. [2021-06-05 13:55:25,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2356 to 2100. [2021-06-05 13:55:25,085 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 13:55:25,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2100 states to 2100 states and 5893 transitions. [2021-06-05 13:55:25,089 INFO L78 Accepts]: Start accepts. Automaton has 2100 states and 5893 transitions. Word has length 20 [2021-06-05 13:55:25,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:25,105 INFO L482 AbstractCegarLoop]: Abstraction has 2100 states and 5893 transitions. [2021-06-05 13:55:25,105 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 13:55:25,105 INFO L276 IsEmpty]: Start isEmpty. Operand 2100 states and 5893 transitions. [2021-06-05 13:55:25,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:55:25,108 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:25,108 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:25,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable618,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:25,341 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:25,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:25,341 INFO L82 PathProgramCache]: Analyzing trace with hash 81541801, now seen corresponding path program 177 times [2021-06-05 13:55:25,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:25,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031289323] [2021-06-05 13:55:25,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:25,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:25,433 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 13:55:25,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:25,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031289323] [2021-06-05 13:55:25,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031289323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:25,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943985184] [2021-06-05 13:55:25,434 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 13:55:25,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:55:25,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:25,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:55:25,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:25,521 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 13:55:25,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943985184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:25,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:25,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-05 13:55:25,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911608167] [2021-06-05 13:55:25,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:55:25,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:25,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:55:25,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:55:25,522 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 13:55:25,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:25,748 INFO L93 Difference]: Finished difference Result 2617 states and 7055 transitions. [2021-06-05 13:55:25,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:55:25,748 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 13:55:25,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:25,751 INFO L225 Difference]: With dead ends: 2617 [2021-06-05 13:55:25,751 INFO L226 Difference]: Without dead ends: 2605 [2021-06-05 13:55:25,752 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 217.7ms TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:55:25,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2605 states. [2021-06-05 13:55:25,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2605 to 2100. [2021-06-05 13:55:25,784 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 13:55:25,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2100 states to 2100 states and 5891 transitions. [2021-06-05 13:55:25,788 INFO L78 Accepts]: Start accepts. Automaton has 2100 states and 5891 transitions. Word has length 20 [2021-06-05 13:55:25,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:25,789 INFO L482 AbstractCegarLoop]: Abstraction has 2100 states and 5891 transitions. [2021-06-05 13:55:25,789 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 13:55:25,789 INFO L276 IsEmpty]: Start isEmpty. Operand 2100 states and 5891 transitions. [2021-06-05 13:55:25,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:55:25,791 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:25,791 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:26,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable619,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:26,014 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:26,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:26,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1400047683, now seen corresponding path program 178 times [2021-06-05 13:55:26,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:26,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340669271] [2021-06-05 13:55:26,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:26,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:26,136 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 13:55:26,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:26,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340669271] [2021-06-05 13:55:26,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340669271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:26,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141412889] [2021-06-05 13:55:26,136 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 13:55:26,207 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:55:26,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:26,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:55:26,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:26,254 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 13:55:26,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141412889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:26,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:26,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-06-05 13:55:26,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534478243] [2021-06-05 13:55:26,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:55:26,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:26,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:55:26,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:55:26,255 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 13:55:26,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:26,347 INFO L93 Difference]: Finished difference Result 2417 states and 6519 transitions. [2021-06-05 13:55:26,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:55:26,348 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 13:55:26,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:26,350 INFO L225 Difference]: With dead ends: 2417 [2021-06-05 13:55:26,350 INFO L226 Difference]: Without dead ends: 2417 [2021-06-05 13:55:26,350 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 116.8ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:55:26,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2021-06-05 13:55:26,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 2170. [2021-06-05 13:55:26,370 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 13:55:26,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2170 states to 2170 states and 6132 transitions. [2021-06-05 13:55:26,373 INFO L78 Accepts]: Start accepts. Automaton has 2170 states and 6132 transitions. Word has length 20 [2021-06-05 13:55:26,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:26,373 INFO L482 AbstractCegarLoop]: Abstraction has 2170 states and 6132 transitions. [2021-06-05 13:55:26,373 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 13:55:26,373 INFO L276 IsEmpty]: Start isEmpty. Operand 2170 states and 6132 transitions. [2021-06-05 13:55:26,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:55:26,375 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:26,375 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:26,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable620 [2021-06-05 13:55:26,576 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:26,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:26,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1677748861, now seen corresponding path program 179 times [2021-06-05 13:55:26,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:26,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136159006] [2021-06-05 13:55:26,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:26,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:26,677 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 13:55:26,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:26,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136159006] [2021-06-05 13:55:26,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136159006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:26,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995741860] [2021-06-05 13:55:26,678 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 13:55:26,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:55:26,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:26,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:55:26,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:26,755 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 13:55:26,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995741860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:26,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:26,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 16 [2021-06-05 13:55:26,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422730924] [2021-06-05 13:55:26,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:55:26,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:26,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:55:26,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:55:26,756 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 13:55:26,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:26,922 INFO L93 Difference]: Finished difference Result 2716 states and 7385 transitions. [2021-06-05 13:55:26,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:55:26,922 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 13:55:26,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:26,925 INFO L225 Difference]: With dead ends: 2716 [2021-06-05 13:55:26,925 INFO L226 Difference]: Without dead ends: 2704 [2021-06-05 13:55:26,925 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 194.0ms TimeCoverageRelationStatistics Valid=206, Invalid=496, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:55:26,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2704 states. [2021-06-05 13:55:26,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2704 to 2170. [2021-06-05 13:55:26,945 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 13:55:26,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2170 states to 2170 states and 6130 transitions. [2021-06-05 13:55:26,948 INFO L78 Accepts]: Start accepts. Automaton has 2170 states and 6130 transitions. Word has length 20 [2021-06-05 13:55:26,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:26,948 INFO L482 AbstractCegarLoop]: Abstraction has 2170 states and 6130 transitions. [2021-06-05 13:55:26,948 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 13:55:26,948 INFO L276 IsEmpty]: Start isEmpty. Operand 2170 states and 6130 transitions. [2021-06-05 13:55:26,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:55:26,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:26,950 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:27,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable621 [2021-06-05 13:55:27,150 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:27,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:27,151 INFO L82 PathProgramCache]: Analyzing trace with hash 682973831, now seen corresponding path program 180 times [2021-06-05 13:55:27,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:27,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440092310] [2021-06-05 13:55:27,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:27,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:27,216 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 13:55:27,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:27,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440092310] [2021-06-05 13:55:27,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440092310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:27,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916472623] [2021-06-05 13:55:27,217 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 13:55:27,241 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:55:27,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:27,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:55:27,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:27,307 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 13:55:27,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916472623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:27,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:27,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 14 [2021-06-05 13:55:27,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352415760] [2021-06-05 13:55:27,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:55:27,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:27,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:55:27,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:55:27,309 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 13:55:27,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:27,392 INFO L93 Difference]: Finished difference Result 2664 states and 7257 transitions. [2021-06-05 13:55:27,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:55:27,393 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 13:55:27,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:27,397 INFO L225 Difference]: With dead ends: 2664 [2021-06-05 13:55:27,397 INFO L226 Difference]: Without dead ends: 2664 [2021-06-05 13:55:27,397 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 74.9ms TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:55:27,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2664 states. [2021-06-05 13:55:27,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2664 to 2389. [2021-06-05 13:55:27,430 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 13:55:27,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2389 states to 2389 states and 6834 transitions. [2021-06-05 13:55:27,435 INFO L78 Accepts]: Start accepts. Automaton has 2389 states and 6834 transitions. Word has length 20 [2021-06-05 13:55:27,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:27,435 INFO L482 AbstractCegarLoop]: Abstraction has 2389 states and 6834 transitions. [2021-06-05 13:55:27,435 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 13:55:27,435 INFO L276 IsEmpty]: Start isEmpty. Operand 2389 states and 6834 transitions. [2021-06-05 13:55:27,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:55:27,438 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:27,438 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:27,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable622,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:27,653 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:27,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:27,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1866538775, now seen corresponding path program 181 times [2021-06-05 13:55:27,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:27,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521244032] [2021-06-05 13:55:27,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:27,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:27,724 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 13:55:27,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:27,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521244032] [2021-06-05 13:55:27,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521244032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:27,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117922720] [2021-06-05 13:55:27,725 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 13:55:27,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:27,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:55:27,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:27,790 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 13:55:27,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117922720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:27,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:27,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 15 [2021-06-05 13:55:27,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768225345] [2021-06-05 13:55:27,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:55:27,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:27,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:55:27,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:55:27,791 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 13:55:27,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:27,859 INFO L93 Difference]: Finished difference Result 2613 states and 7149 transitions. [2021-06-05 13:55:27,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:55:27,859 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 13:55:27,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:27,862 INFO L225 Difference]: With dead ends: 2613 [2021-06-05 13:55:27,862 INFO L226 Difference]: Without dead ends: 2613 [2021-06-05 13:55:27,862 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 78.3ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:55:27,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2613 states. [2021-06-05 13:55:27,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2613 to 2388. [2021-06-05 13:55:27,886 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 13:55:27,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2388 states to 2388 states and 6829 transitions. [2021-06-05 13:55:27,889 INFO L78 Accepts]: Start accepts. Automaton has 2388 states and 6829 transitions. Word has length 20 [2021-06-05 13:55:27,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:27,890 INFO L482 AbstractCegarLoop]: Abstraction has 2388 states and 6829 transitions. [2021-06-05 13:55:27,890 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 13:55:27,890 INFO L276 IsEmpty]: Start isEmpty. Operand 2388 states and 6829 transitions. [2021-06-05 13:55:27,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:55:27,892 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:27,892 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:28,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable623 [2021-06-05 13:55:28,092 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:28,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:28,093 INFO L82 PathProgramCache]: Analyzing trace with hash -155925467, now seen corresponding path program 182 times [2021-06-05 13:55:28,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:28,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400851456] [2021-06-05 13:55:28,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:28,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:28,160 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 13:55:28,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:28,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400851456] [2021-06-05 13:55:28,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400851456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:28,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939996471] [2021-06-05 13:55:28,161 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 13:55:28,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:55:28,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:28,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:55:28,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:28,220 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 13:55:28,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939996471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:28,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:28,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 14 [2021-06-05 13:55:28,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870347962] [2021-06-05 13:55:28,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:55:28,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:28,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:55:28,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:55:28,221 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 13:55:28,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:28,347 INFO L93 Difference]: Finished difference Result 2617 states and 7158 transitions. [2021-06-05 13:55:28,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:55:28,348 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 13:55:28,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:28,350 INFO L225 Difference]: With dead ends: 2617 [2021-06-05 13:55:28,350 INFO L226 Difference]: Without dead ends: 2615 [2021-06-05 13:55:28,350 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 114.7ms TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:55:28,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2615 states. [2021-06-05 13:55:28,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2615 to 2388. [2021-06-05 13:55:28,374 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 13:55:28,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2388 states to 2388 states and 6827 transitions. [2021-06-05 13:55:28,377 INFO L78 Accepts]: Start accepts. Automaton has 2388 states and 6827 transitions. Word has length 20 [2021-06-05 13:55:28,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:28,377 INFO L482 AbstractCegarLoop]: Abstraction has 2388 states and 6827 transitions. [2021-06-05 13:55:28,377 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 13:55:28,378 INFO L276 IsEmpty]: Start isEmpty. Operand 2388 states and 6827 transitions. [2021-06-05 13:55:28,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:55:28,380 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:28,380 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:28,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable624 [2021-06-05 13:55:28,580 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:28,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:28,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1333479529, now seen corresponding path program 183 times [2021-06-05 13:55:28,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:28,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119312106] [2021-06-05 13:55:28,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:28,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:28,676 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 13:55:28,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:28,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119312106] [2021-06-05 13:55:28,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119312106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:28,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090076177] [2021-06-05 13:55:28,676 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 13:55:28,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:55:28,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:28,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:55:28,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:28,746 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 13:55:28,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090076177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:28,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:28,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 15 [2021-06-05 13:55:28,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300893288] [2021-06-05 13:55:28,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:55:28,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:28,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:55:28,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:55:28,747 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 13:55:28,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:28,888 INFO L93 Difference]: Finished difference Result 2623 states and 7164 transitions. [2021-06-05 13:55:28,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:55:28,889 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 13:55:28,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:28,892 INFO L225 Difference]: With dead ends: 2623 [2021-06-05 13:55:28,892 INFO L226 Difference]: Without dead ends: 2619 [2021-06-05 13:55:28,892 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 145.3ms TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:55:28,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2619 states. [2021-06-05 13:55:28,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2619 to 2395. [2021-06-05 13:55:28,915 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 13:55:28,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2395 states to 2395 states and 6850 transitions. [2021-06-05 13:55:28,918 INFO L78 Accepts]: Start accepts. Automaton has 2395 states and 6850 transitions. Word has length 20 [2021-06-05 13:55:28,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:28,919 INFO L482 AbstractCegarLoop]: Abstraction has 2395 states and 6850 transitions. [2021-06-05 13:55:28,919 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 13:55:28,919 INFO L276 IsEmpty]: Start isEmpty. Operand 2395 states and 6850 transitions. [2021-06-05 13:55:28,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:55:28,921 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:28,921 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:29,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable625 [2021-06-05 13:55:29,121 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:29,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:29,122 INFO L82 PathProgramCache]: Analyzing trace with hash 260394149, now seen corresponding path program 184 times [2021-06-05 13:55:29,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:29,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880139796] [2021-06-05 13:55:29,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:29,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:29,190 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 13:55:29,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:29,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880139796] [2021-06-05 13:55:29,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880139796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:29,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076389782] [2021-06-05 13:55:29,191 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 13:55:29,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:55:29,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:29,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:55:29,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:29,264 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 13:55:29,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076389782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:29,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:29,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 15 [2021-06-05 13:55:29,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723538268] [2021-06-05 13:55:29,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:55:29,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:29,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:55:29,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:55:29,265 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 13:55:29,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:29,449 INFO L93 Difference]: Finished difference Result 3316 states and 9099 transitions. [2021-06-05 13:55:29,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:55:29,450 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 13:55:29,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:29,455 INFO L225 Difference]: With dead ends: 3316 [2021-06-05 13:55:29,455 INFO L226 Difference]: Without dead ends: 3310 [2021-06-05 13:55:29,455 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 148.6ms TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:55:29,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3310 states. [2021-06-05 13:55:29,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3310 to 2395. [2021-06-05 13:55:29,494 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 13:55:29,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2395 states to 2395 states and 6845 transitions. [2021-06-05 13:55:29,499 INFO L78 Accepts]: Start accepts. Automaton has 2395 states and 6845 transitions. Word has length 20 [2021-06-05 13:55:29,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:29,500 INFO L482 AbstractCegarLoop]: Abstraction has 2395 states and 6845 transitions. [2021-06-05 13:55:29,500 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 13:55:29,500 INFO L276 IsEmpty]: Start isEmpty. Operand 2395 states and 6845 transitions. [2021-06-05 13:55:29,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:55:29,503 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:29,503 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:29,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable626,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:29,717 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:29,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:29,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1354485737, now seen corresponding path program 185 times [2021-06-05 13:55:29,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:29,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457661944] [2021-06-05 13:55:29,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:29,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:29,799 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 13:55:29,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:29,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457661944] [2021-06-05 13:55:29,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457661944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:29,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249083253] [2021-06-05 13:55:29,799 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 13:55:29,823 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:55:29,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:29,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:55:29,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:29,878 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 13:55:29,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249083253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:29,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:29,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 16 [2021-06-05 13:55:29,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41500303] [2021-06-05 13:55:29,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:55:29,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:29,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:55:29,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:55:29,879 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 13:55:30,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:30,029 INFO L93 Difference]: Finished difference Result 3332 states and 9114 transitions. [2021-06-05 13:55:30,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:55:30,029 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 13:55:30,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:30,032 INFO L225 Difference]: With dead ends: 3332 [2021-06-05 13:55:30,033 INFO L226 Difference]: Without dead ends: 3324 [2021-06-05 13:55:30,033 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 158.6ms TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:55:30,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3324 states. [2021-06-05 13:55:30,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3324 to 2411. [2021-06-05 13:55:30,057 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 13:55:30,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2411 states to 2411 states and 6889 transitions. [2021-06-05 13:55:30,061 INFO L78 Accepts]: Start accepts. Automaton has 2411 states and 6889 transitions. Word has length 20 [2021-06-05 13:55:30,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:30,061 INFO L482 AbstractCegarLoop]: Abstraction has 2411 states and 6889 transitions. [2021-06-05 13:55:30,061 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 13:55:30,061 INFO L276 IsEmpty]: Start isEmpty. Operand 2411 states and 6889 transitions. [2021-06-05 13:55:30,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:55:30,063 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:30,063 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:30,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable627,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:30,263 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:30,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:30,264 INFO L82 PathProgramCache]: Analyzing trace with hash 911586597, now seen corresponding path program 186 times [2021-06-05 13:55:30,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:30,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894243914] [2021-06-05 13:55:30,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:30,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:30,333 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 13:55:30,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:30,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894243914] [2021-06-05 13:55:30,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894243914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:30,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167448669] [2021-06-05 13:55:30,333 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 13:55:30,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:55:30,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:30,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:55:30,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:30,414 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 13:55:30,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167448669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:30,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:30,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 16 [2021-06-05 13:55:30,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197516799] [2021-06-05 13:55:30,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:55:30,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:30,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:55:30,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:55:30,415 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 13:55:30,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:30,583 INFO L93 Difference]: Finished difference Result 3194 states and 8791 transitions. [2021-06-05 13:55:30,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:55:30,583 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 13:55:30,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:30,586 INFO L225 Difference]: With dead ends: 3194 [2021-06-05 13:55:30,586 INFO L226 Difference]: Without dead ends: 3184 [2021-06-05 13:55:30,586 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 161.5ms TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:55:30,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3184 states. [2021-06-05 13:55:30,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3184 to 2411. [2021-06-05 13:55:30,610 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 13:55:30,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2411 states to 2411 states and 6887 transitions. [2021-06-05 13:55:30,613 INFO L78 Accepts]: Start accepts. Automaton has 2411 states and 6887 transitions. Word has length 20 [2021-06-05 13:55:30,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:30,614 INFO L482 AbstractCegarLoop]: Abstraction has 2411 states and 6887 transitions. [2021-06-05 13:55:30,614 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 13:55:30,614 INFO L276 IsEmpty]: Start isEmpty. Operand 2411 states and 6887 transitions. [2021-06-05 13:55:30,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:55:30,616 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:30,616 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:30,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable628 [2021-06-05 13:55:30,816 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:30,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:30,816 INFO L82 PathProgramCache]: Analyzing trace with hash 66615145, now seen corresponding path program 187 times [2021-06-05 13:55:30,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:30,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354773555] [2021-06-05 13:55:30,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:30,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:30,902 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 13:55:30,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:30,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354773555] [2021-06-05 13:55:30,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354773555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:30,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194230512] [2021-06-05 13:55:30,903 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 13:55:30,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:30,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:55:30,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:31,010 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 13:55:31,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194230512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:31,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:31,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2021-06-05 13:55:31,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113690121] [2021-06-05 13:55:31,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:55:31,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:31,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:55:31,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:55:31,011 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 13:55:31,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:31,206 INFO L93 Difference]: Finished difference Result 3215 states and 8812 transitions. [2021-06-05 13:55:31,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:55:31,206 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 13:55:31,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:31,210 INFO L225 Difference]: With dead ends: 3215 [2021-06-05 13:55:31,211 INFO L226 Difference]: Without dead ends: 3203 [2021-06-05 13:55:31,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 207.8ms TimeCoverageRelationStatistics Valid=213, Invalid=543, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:55:31,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3203 states. [2021-06-05 13:55:31,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3203 to 2417. [2021-06-05 13:55:31,243 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 13:55:31,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 6903 transitions. [2021-06-05 13:55:31,248 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 6903 transitions. Word has length 20 [2021-06-05 13:55:31,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:31,248 INFO L482 AbstractCegarLoop]: Abstraction has 2417 states and 6903 transitions. [2021-06-05 13:55:31,248 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 13:55:31,248 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 6903 transitions. [2021-06-05 13:55:31,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 13:55:31,250 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:31,250 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:31,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable629,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:31,472 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:31,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:31,472 INFO L82 PathProgramCache]: Analyzing trace with hash -357696091, now seen corresponding path program 188 times [2021-06-05 13:55:31,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:31,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273983279] [2021-06-05 13:55:31,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:31,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:31,566 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 13:55:31,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:31,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273983279] [2021-06-05 13:55:31,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273983279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:31,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998319711] [2021-06-05 13:55:31,568 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 13:55:31,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:55:31,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:31,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 13:55:31,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:31,679 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 13:55:31,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998319711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:31,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:31,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 18 [2021-06-05 13:55:31,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148483879] [2021-06-05 13:55:31,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:55:31,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:31,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:55:31,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:55:31,680 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 13:55:31,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:31,835 INFO L93 Difference]: Finished difference Result 2609 states and 7349 transitions. [2021-06-05 13:55:31,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:55:31,836 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 13:55:31,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:31,838 INFO L225 Difference]: With dead ends: 2609 [2021-06-05 13:55:31,839 INFO L226 Difference]: Without dead ends: 2602 [2021-06-05 13:55:31,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 209.7ms TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:55:31,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2602 states. [2021-06-05 13:55:31,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2602 to 2417. [2021-06-05 13:55:31,861 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 13:55:31,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 6902 transitions. [2021-06-05 13:55:31,865 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 6902 transitions. Word has length 20 [2021-06-05 13:55:31,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:31,865 INFO L482 AbstractCegarLoop]: Abstraction has 2417 states and 6902 transitions. [2021-06-05 13:55:31,865 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 13:55:31,865 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 6902 transitions. [2021-06-05 13:55:31,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:55:31,868 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:31,868 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:32,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable630 [2021-06-05 13:55:32,073 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:32,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:32,073 INFO L82 PathProgramCache]: Analyzing trace with hash 208179366, now seen corresponding path program 189 times [2021-06-05 13:55:32,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:32,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822015925] [2021-06-05 13:55:32,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:32,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:32,126 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 13:55:32,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:32,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822015925] [2021-06-05 13:55:32,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822015925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:32,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615187893] [2021-06-05 13:55:32,126 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 13:55:32,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:55:32,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:32,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 13:55:32,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:32,428 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:55:32,428 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 13:55:33,499 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 475 DAG size of output: 373 [2021-06-05 13:55:33,736 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 475 DAG size of output: 373 [2021-06-05 13:55:33,918 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 486 DAG size of output: 384 [2021-06-05 13:55:34,192 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 477 [2021-06-05 13:55:35,090 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 258 DAG size of output: 357 [2021-06-05 13:55:36,365 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 495 DAG size of output: 289 [2021-06-05 13:55:36,493 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 502 DAG size of output: 290 [2021-06-05 13:55:36,708 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 647 DAG size of output: 412 [2021-06-05 13:55:37,045 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 859 DAG size of output: 552 [2021-06-05 13:55:37,595 WARN L205 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 1137 DAG size of output: 709 [2021-06-05 13:55:38,301 WARN L205 SmtUtils]: Spent 701.00 ms on a formula simplification. DAG size of input: 1137 DAG size of output: 709 [2021-06-05 13:55:38,894 WARN L205 SmtUtils]: Spent 589.00 ms on a formula simplification. DAG size of input: 1142 DAG size of output: 714 [2021-06-05 13:55:39,709 WARN L205 SmtUtils]: Spent 810.00 ms on a formula simplification. DAG size of input: 716 DAG size of output: 705 [2021-06-05 13:55:40,022 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 413 DAG size of output: 442 [2021-06-05 13:55:40,920 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 480 DAG size of output: 220 [2021-06-05 13:55:41,024 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 480 DAG size of output: 220 [2021-06-05 13:55:41,146 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 483 DAG size of output: 224 [2021-06-05 13:55:41,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:55:41,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:55:41,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:55:41,372 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 13:55:41,377 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 13:55:41,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615187893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:41,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:41,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-06-05 13:55:41,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311891178] [2021-06-05 13:55:41,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:55:41,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:41,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:55:41,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:55:41,378 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 13:55:41,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:41,621 INFO L93 Difference]: Finished difference Result 2595 states and 7261 transitions. [2021-06-05 13:55:41,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:55:41,621 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 13:55:41,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:41,624 INFO L225 Difference]: With dead ends: 2595 [2021-06-05 13:55:41,624 INFO L226 Difference]: Without dead ends: 2592 [2021-06-05 13:55:41,625 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 190.3ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:55:41,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2592 states. [2021-06-05 13:55:41,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2592 to 2489. [2021-06-05 13:55:41,646 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 13:55:41,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2489 states to 2489 states and 7113 transitions. [2021-06-05 13:55:41,650 INFO L78 Accepts]: Start accepts. Automaton has 2489 states and 7113 transitions. Word has length 21 [2021-06-05 13:55:41,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:41,650 INFO L482 AbstractCegarLoop]: Abstraction has 2489 states and 7113 transitions. [2021-06-05 13:55:41,650 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 13:55:41,650 INFO L276 IsEmpty]: Start isEmpty. Operand 2489 states and 7113 transitions. [2021-06-05 13:55:41,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:55:41,652 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:41,652 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:41,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable631 [2021-06-05 13:55:41,853 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:41,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:41,853 INFO L82 PathProgramCache]: Analyzing trace with hash -120892348, now seen corresponding path program 190 times [2021-06-05 13:55:41,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:41,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391269028] [2021-06-05 13:55:41,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:41,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:41,905 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 13:55:41,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:41,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391269028] [2021-06-05 13:55:41,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391269028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:41,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514866023] [2021-06-05 13:55:41,905 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 13:55:41,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:55:41,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:41,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 13:55:41,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:42,206 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:55:42,207 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 13:55:43,003 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 258 [2021-06-05 13:55:43,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:55:43,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:55:43,855 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:55:43,855 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 13:55:43,861 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 13:55:43,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514866023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:43,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:43,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-06-05 13:55:43,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380317757] [2021-06-05 13:55:43,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:55:43,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:43,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:55:43,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:55:43,862 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 13:55:44,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:44,077 INFO L93 Difference]: Finished difference Result 2702 states and 7537 transitions. [2021-06-05 13:55:44,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:55:44,078 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 13:55:44,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:44,081 INFO L225 Difference]: With dead ends: 2702 [2021-06-05 13:55:44,081 INFO L226 Difference]: Without dead ends: 2699 [2021-06-05 13:55:44,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 189.6ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:55:44,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2699 states. [2021-06-05 13:55:44,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2699 to 2548. [2021-06-05 13:55:44,105 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 13:55:44,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2548 states to 2548 states and 7309 transitions. [2021-06-05 13:55:44,109 INFO L78 Accepts]: Start accepts. Automaton has 2548 states and 7309 transitions. Word has length 21 [2021-06-05 13:55:44,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:44,109 INFO L482 AbstractCegarLoop]: Abstraction has 2548 states and 7309 transitions. [2021-06-05 13:55:44,109 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 13:55:44,109 INFO L276 IsEmpty]: Start isEmpty. Operand 2548 states and 7309 transitions. [2021-06-05 13:55:44,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:55:44,111 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:44,111 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:44,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1211 [2021-06-05 13:55:44,312 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:44,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:44,312 INFO L82 PathProgramCache]: Analyzing trace with hash 670459314, now seen corresponding path program 191 times [2021-06-05 13:55:44,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:44,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250624101] [2021-06-05 13:55:44,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:44,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:44,362 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 13:55:44,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:44,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250624101] [2021-06-05 13:55:44,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250624101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:44,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524803256] [2021-06-05 13:55:44,362 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 13:55:44,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:55:44,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:44,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 13:55:44,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:44,666 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:55:44,666 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 13:55:45,747 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:55:45,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:55:45,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:55:45,748 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 13:55:45,754 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 13:55:45,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524803256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:45,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:45,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-06-05 13:55:45,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580077144] [2021-06-05 13:55:45,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:55:45,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:45,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:55:45,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:55:45,755 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 13:55:45,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:45,931 INFO L93 Difference]: Finished difference Result 2762 states and 7744 transitions. [2021-06-05 13:55:45,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:55:45,931 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 13:55:45,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:45,934 INFO L225 Difference]: With dead ends: 2762 [2021-06-05 13:55:45,934 INFO L226 Difference]: Without dead ends: 2759 [2021-06-05 13:55:45,935 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 191.3ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:55:45,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2759 states. [2021-06-05 13:55:45,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2759 to 2605. [2021-06-05 13:55:45,958 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 13:55:45,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2605 states to 2605 states and 7509 transitions. [2021-06-05 13:55:45,962 INFO L78 Accepts]: Start accepts. Automaton has 2605 states and 7509 transitions. Word has length 21 [2021-06-05 13:55:45,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:45,962 INFO L482 AbstractCegarLoop]: Abstraction has 2605 states and 7509 transitions. [2021-06-05 13:55:45,962 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 13:55:45,962 INFO L276 IsEmpty]: Start isEmpty. Operand 2605 states and 7509 transitions. [2021-06-05 13:55:45,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:55:45,964 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:45,964 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:46,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1386 [2021-06-05 13:55:46,165 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:46,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:46,165 INFO L82 PathProgramCache]: Analyzing trace with hash -567442940, now seen corresponding path program 192 times [2021-06-05 13:55:46,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:46,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917579144] [2021-06-05 13:55:46,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:46,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:46,215 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 13:55:46,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:46,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917579144] [2021-06-05 13:55:46,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917579144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:46,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530155832] [2021-06-05 13:55:46,216 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 13:55:46,241 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 13:55:46,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:46,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 13:55:46,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:46,519 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:55:46,519 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 13:55:48,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:55:48,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:55:48,258 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:55:48,259 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 13:55:48,264 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 13:55:48,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530155832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:48,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:48,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-06-05 13:55:48,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029245439] [2021-06-05 13:55:48,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:55:48,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:48,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:55:48,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:55:48,265 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 13:55:48,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:48,515 INFO L93 Difference]: Finished difference Result 2824 states and 7965 transitions. [2021-06-05 13:55:48,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:55:48,515 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 13:55:48,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:48,519 INFO L225 Difference]: With dead ends: 2824 [2021-06-05 13:55:48,519 INFO L226 Difference]: Without dead ends: 2821 [2021-06-05 13:55:48,519 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 193.0ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:55:48,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2821 states. [2021-06-05 13:55:48,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2821 to 2666. [2021-06-05 13:55:48,541 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 13:55:48,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2666 states to 2666 states and 7729 transitions. [2021-06-05 13:55:48,545 INFO L78 Accepts]: Start accepts. Automaton has 2666 states and 7729 transitions. Word has length 21 [2021-06-05 13:55:48,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:48,545 INFO L482 AbstractCegarLoop]: Abstraction has 2666 states and 7729 transitions. [2021-06-05 13:55:48,545 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 13:55:48,545 INFO L276 IsEmpty]: Start isEmpty. Operand 2666 states and 7729 transitions. [2021-06-05 13:55:48,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:55:48,547 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:48,547 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:48,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1582,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:48,748 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:48,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:48,748 INFO L82 PathProgramCache]: Analyzing trace with hash -287707150, now seen corresponding path program 193 times [2021-06-05 13:55:48,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:48,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223937698] [2021-06-05 13:55:48,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:48,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:48,797 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 13:55:48,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:48,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223937698] [2021-06-05 13:55:48,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223937698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:48,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833459622] [2021-06-05 13:55:48,798 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 13:55:48,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:48,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 13:55:48,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:49,097 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:55:49,097 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 13:55:50,132 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:55:50,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:55:50,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:55:50,134 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 13:55:50,140 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 13:55:50,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833459622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:50,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:50,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-06-05 13:55:50,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432406389] [2021-06-05 13:55:50,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:55:50,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:50,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:55:50,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:55:50,140 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 13:55:50,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:50,315 INFO L93 Difference]: Finished difference Result 2927 states and 8298 transitions. [2021-06-05 13:55:50,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:55:50,316 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 13:55:50,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:50,319 INFO L225 Difference]: With dead ends: 2927 [2021-06-05 13:55:50,319 INFO L226 Difference]: Without dead ends: 2924 [2021-06-05 13:55:50,319 INFO L777 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 13:55:50,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2924 states. [2021-06-05 13:55:50,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2924 to 2756. [2021-06-05 13:55:50,345 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 13:55:50,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2756 states to 2756 states and 8050 transitions. [2021-06-05 13:55:50,349 INFO L78 Accepts]: Start accepts. Automaton has 2756 states and 8050 transitions. Word has length 21 [2021-06-05 13:55:50,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:50,349 INFO L482 AbstractCegarLoop]: Abstraction has 2756 states and 8050 transitions. [2021-06-05 13:55:50,349 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 13:55:50,349 INFO L276 IsEmpty]: Start isEmpty. Operand 2756 states and 8050 transitions. [2021-06-05 13:55:50,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:55:50,351 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:50,351 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:50,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1894 [2021-06-05 13:55:50,552 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:50,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:50,552 INFO L82 PathProgramCache]: Analyzing trace with hash -205832252, now seen corresponding path program 194 times [2021-06-05 13:55:50,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:50,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745586075] [2021-06-05 13:55:50,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:50,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:50,607 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 13:55:50,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:50,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745586075] [2021-06-05 13:55:50,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745586075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:50,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983996006] [2021-06-05 13:55:50,607 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 13:55:50,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:55:50,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:50,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 13:55:50,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:50,953 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 13:55:50,953 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:55:50,953 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 13:55:51,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:55:51,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:55:51,945 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:55:51,945 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 13:55:51,955 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 13:55:51,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983996006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:51,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:51,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-06-05 13:55:51,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443854675] [2021-06-05 13:55:51,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:55:51,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:51,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:55:51,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:55:51,956 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 13:55:52,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:52,275 INFO L93 Difference]: Finished difference Result 3020 states and 8621 transitions. [2021-06-05 13:55:52,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:55:52,276 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 13:55:52,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:52,279 INFO L225 Difference]: With dead ends: 3020 [2021-06-05 13:55:52,279 INFO L226 Difference]: Without dead ends: 3017 [2021-06-05 13:55:52,279 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 223.3ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:55:52,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3017 states. [2021-06-05 13:55:52,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3017 to 2845. [2021-06-05 13:55:52,304 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 13:55:52,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2845 states to 2845 states and 8371 transitions. [2021-06-05 13:55:52,308 INFO L78 Accepts]: Start accepts. Automaton has 2845 states and 8371 transitions. Word has length 21 [2021-06-05 13:55:52,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:52,308 INFO L482 AbstractCegarLoop]: Abstraction has 2845 states and 8371 transitions. [2021-06-05 13:55:52,308 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 13:55:52,308 INFO L276 IsEmpty]: Start isEmpty. Operand 2845 states and 8371 transitions. [2021-06-05 13:55:52,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:55:52,311 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:52,311 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:52,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2060,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:52,511 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:52,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:52,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1962677710, now seen corresponding path program 195 times [2021-06-05 13:55:52,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:52,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986598702] [2021-06-05 13:55:52,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:52,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:52,561 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 13:55:52,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:52,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986598702] [2021-06-05 13:55:52,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986598702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:52,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216235785] [2021-06-05 13:55:52,561 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 13:55:52,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:55:52,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:52,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 13:55:52,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:52,856 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:55:52,856 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 13:55:53,383 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 320 [2021-06-05 13:55:53,486 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 320 [2021-06-05 13:55:53,625 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 329 [2021-06-05 13:55:53,751 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 368 [2021-06-05 13:55:53,925 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 431 [2021-06-05 13:55:54,087 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 410 [2021-06-05 13:55:54,416 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 259 [2021-06-05 13:55:54,539 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 305 [2021-06-05 13:55:54,666 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 305 [2021-06-05 13:55:54,809 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 422 DAG size of output: 312 [2021-06-05 13:55:55,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:55:55,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:55:55,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:55:55,248 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 13:55:55,254 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 13:55:55,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216235785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:55,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:55,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-06-05 13:55:55,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149064186] [2021-06-05 13:55:55,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:55:55,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:55,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:55:55,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:55:55,255 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 13:55:55,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:55,480 INFO L93 Difference]: Finished difference Result 3164 states and 9122 transitions. [2021-06-05 13:55:55,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:55:55,481 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 13:55:55,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:55,485 INFO L225 Difference]: With dead ends: 3164 [2021-06-05 13:55:55,485 INFO L226 Difference]: Without dead ends: 3161 [2021-06-05 13:55:55,485 INFO L777 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 13:55:55,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3161 states. [2021-06-05 13:55:55,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3161 to 3004. [2021-06-05 13:55:55,513 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 13:55:55,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3004 states to 3004 states and 8906 transitions. [2021-06-05 13:55:55,517 INFO L78 Accepts]: Start accepts. Automaton has 3004 states and 8906 transitions. Word has length 21 [2021-06-05 13:55:55,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:55,517 INFO L482 AbstractCegarLoop]: Abstraction has 3004 states and 8906 transitions. [2021-06-05 13:55:55,517 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 13:55:55,517 INFO L276 IsEmpty]: Start isEmpty. Operand 3004 states and 8906 transitions. [2021-06-05 13:55:55,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:55:55,519 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:55,519 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:55,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2227 [2021-06-05 13:55:55,720 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:55,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:55,720 INFO L82 PathProgramCache]: Analyzing trace with hash -590312060, now seen corresponding path program 196 times [2021-06-05 13:55:55,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:55,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303775769] [2021-06-05 13:55:55,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:55,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:55,770 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 13:55:55,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:55,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303775769] [2021-06-05 13:55:55,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303775769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:55,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456512198] [2021-06-05 13:55:55,770 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 13:55:55,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:55:55,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:55,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 13:55:55,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:56,072 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:55:56,072 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 13:55:57,070 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 244 [2021-06-05 13:55:57,184 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 244 [2021-06-05 13:55:57,312 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 249 [2021-06-05 13:55:57,448 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 333 [2021-06-05 13:55:57,659 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 302 [2021-06-05 13:55:58,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:55:58,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:55:58,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:55:58,227 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 13:55:58,233 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 13:55:58,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456512198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:58,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:58,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-06-05 13:55:58,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689831961] [2021-06-05 13:55:58,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:55:58,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:58,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:55:58,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:55:58,234 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 13:55:58,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:58,523 INFO L93 Difference]: Finished difference Result 3650 states and 10596 transitions. [2021-06-05 13:55:58,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:55:58,523 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 13:55:58,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:58,528 INFO L225 Difference]: With dead ends: 3650 [2021-06-05 13:55:58,528 INFO L226 Difference]: Without dead ends: 3647 [2021-06-05 13:55:58,528 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 194.2ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:55:58,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3647 states. [2021-06-05 13:55:58,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3647 to 3491. [2021-06-05 13:55:58,562 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 13:55:58,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3491 states to 3491 states and 10391 transitions. [2021-06-05 13:55:58,567 INFO L78 Accepts]: Start accepts. Automaton has 3491 states and 10391 transitions. Word has length 21 [2021-06-05 13:55:58,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:58,568 INFO L482 AbstractCegarLoop]: Abstraction has 3491 states and 10391 transitions. [2021-06-05 13:55:58,568 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 13:55:58,568 INFO L276 IsEmpty]: Start isEmpty. Operand 3491 states and 10391 transitions. [2021-06-05 13:55:58,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:55:58,571 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:58,571 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:58,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2467 [2021-06-05 13:55:58,771 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:58,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:58,772 INFO L82 PathProgramCache]: Analyzing trace with hash -996649870, now seen corresponding path program 197 times [2021-06-05 13:55:58,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:58,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383300757] [2021-06-05 13:55:58,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:58,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:58,823 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 13:55:58,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:58,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383300757] [2021-06-05 13:55:58,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383300757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:58,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809240775] [2021-06-05 13:55:58,823 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 13:55:58,848 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:55:58,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:58,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 13:55:58,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:59,146 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:55:59,146 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 13:56:00,247 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 225 [2021-06-05 13:56:00,393 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 291 [2021-06-05 13:56:00,540 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 291 [2021-06-05 13:56:00,706 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 298 [2021-06-05 13:56:01,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:56:01,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:56:01,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:56:01,237 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 13:56:01,243 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 13:56:01,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809240775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:01,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:01,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-06-05 13:56:01,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971980722] [2021-06-05 13:56:01,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:56:01,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:01,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:56:01,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:56:01,244 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 13:56:01,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:01,494 INFO L93 Difference]: Finished difference Result 4057 states and 11844 transitions. [2021-06-05 13:56:01,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:56:01,495 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 13:56:01,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:01,500 INFO L225 Difference]: With dead ends: 4057 [2021-06-05 13:56:01,500 INFO L226 Difference]: Without dead ends: 4054 [2021-06-05 13:56:01,500 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 217.9ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:56:01,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4054 states. [2021-06-05 13:56:01,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4054 to 3906. [2021-06-05 13:56:01,539 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 13:56:01,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3906 states to 3906 states and 11651 transitions. [2021-06-05 13:56:01,545 INFO L78 Accepts]: Start accepts. Automaton has 3906 states and 11651 transitions. Word has length 21 [2021-06-05 13:56:01,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:01,545 INFO L482 AbstractCegarLoop]: Abstraction has 3906 states and 11651 transitions. [2021-06-05 13:56:01,545 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 13:56:01,545 INFO L276 IsEmpty]: Start isEmpty. Operand 3906 states and 11651 transitions. [2021-06-05 13:56:01,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:01,549 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:01,549 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:01,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2674,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:01,749 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:01,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:01,749 INFO L82 PathProgramCache]: Analyzing trace with hash -836665722, now seen corresponding path program 198 times [2021-06-05 13:56:01,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:01,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985284641] [2021-06-05 13:56:01,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:01,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:01,836 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 13:56:01,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:01,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985284641] [2021-06-05 13:56:01,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985284641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:01,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634188758] [2021-06-05 13:56:01,836 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 13:56:01,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:56:01,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:01,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:01,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:01,908 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 13:56:01,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634188758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:01,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:01,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 13:56:01,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728679657] [2021-06-05 13:56:01,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:56:01,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:01,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:56:01,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:56:01,909 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 13:56:02,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:02,091 INFO L93 Difference]: Finished difference Result 4087 states and 11914 transitions. [2021-06-05 13:56:02,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:56:02,091 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 13:56:02,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:02,096 INFO L225 Difference]: With dead ends: 4087 [2021-06-05 13:56:02,096 INFO L226 Difference]: Without dead ends: 4087 [2021-06-05 13:56:02,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 178.3ms TimeCoverageRelationStatistics Valid=286, Invalid=584, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:56:02,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4087 states. [2021-06-05 13:56:02,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4087 to 3867. [2021-06-05 13:56:02,134 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 13:56:02,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3867 states to 3867 states and 11529 transitions. [2021-06-05 13:56:02,139 INFO L78 Accepts]: Start accepts. Automaton has 3867 states and 11529 transitions. Word has length 22 [2021-06-05 13:56:02,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:02,139 INFO L482 AbstractCegarLoop]: Abstraction has 3867 states and 11529 transitions. [2021-06-05 13:56:02,139 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 13:56:02,139 INFO L276 IsEmpty]: Start isEmpty. Operand 3867 states and 11529 transitions. [2021-06-05 13:56:02,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:02,143 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:02,143 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:02,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2911 [2021-06-05 13:56:02,343 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:02,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:02,344 INFO L82 PathProgramCache]: Analyzing trace with hash -2113302545, now seen corresponding path program 199 times [2021-06-05 13:56:02,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:02,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376090302] [2021-06-05 13:56:02,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:02,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:02,425 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 13:56:02,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:02,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376090302] [2021-06-05 13:56:02,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376090302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:02,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397368337] [2021-06-05 13:56:02,426 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 13:56:02,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:02,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:02,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:02,489 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 13:56:02,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397368337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:02,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:02,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 13:56:02,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935336239] [2021-06-05 13:56:02,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:56:02,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:02,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:56:02,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:56:02,490 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 13:56:02,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:02,735 INFO L93 Difference]: Finished difference Result 4251 states and 12125 transitions. [2021-06-05 13:56:02,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 13:56:02,735 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 13:56:02,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:02,740 INFO L225 Difference]: With dead ends: 4251 [2021-06-05 13:56:02,740 INFO L226 Difference]: Without dead ends: 4240 [2021-06-05 13:56:02,740 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 209.3ms TimeCoverageRelationStatistics Valid=374, Invalid=748, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 13:56:02,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4240 states. [2021-06-05 13:56:02,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4240 to 3890. [2021-06-05 13:56:02,780 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 13:56:02,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3890 states to 3890 states and 11584 transitions. [2021-06-05 13:56:02,785 INFO L78 Accepts]: Start accepts. Automaton has 3890 states and 11584 transitions. Word has length 22 [2021-06-05 13:56:02,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:02,786 INFO L482 AbstractCegarLoop]: Abstraction has 3890 states and 11584 transitions. [2021-06-05 13:56:02,786 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 13:56:02,786 INFO L276 IsEmpty]: Start isEmpty. Operand 3890 states and 11584 transitions. [2021-06-05 13:56:02,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:02,789 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:02,789 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:02,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2912,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:02,990 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:02,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:02,990 INFO L82 PathProgramCache]: Analyzing trace with hash 579717254, now seen corresponding path program 200 times [2021-06-05 13:56:02,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:02,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985757486] [2021-06-05 13:56:02,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:02,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:03,048 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 13:56:03,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:03,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985757486] [2021-06-05 13:56:03,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985757486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:03,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212071668] [2021-06-05 13:56:03,049 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 13:56:03,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:56:03,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:03,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:03,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:03,106 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 13:56:03,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212071668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:03,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:03,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:56:03,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540183599] [2021-06-05 13:56:03,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:56:03,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:03,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:56:03,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:56:03,107 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 13:56:03,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:03,273 INFO L93 Difference]: Finished difference Result 3929 states and 11639 transitions. [2021-06-05 13:56:03,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:56:03,273 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 13:56:03,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:03,277 INFO L225 Difference]: With dead ends: 3929 [2021-06-05 13:56:03,278 INFO L226 Difference]: Without dead ends: 3928 [2021-06-05 13:56:03,278 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 99.1ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:56:03,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3928 states. [2021-06-05 13:56:03,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3928 to 3890. [2021-06-05 13:56:03,318 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 13:56:03,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3890 states to 3890 states and 11582 transitions. [2021-06-05 13:56:03,324 INFO L78 Accepts]: Start accepts. Automaton has 3890 states and 11582 transitions. Word has length 22 [2021-06-05 13:56:03,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:03,324 INFO L482 AbstractCegarLoop]: Abstraction has 3890 states and 11582 transitions. [2021-06-05 13:56:03,324 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 13:56:03,324 INFO L276 IsEmpty]: Start isEmpty. Operand 3890 states and 11582 transitions. [2021-06-05 13:56:03,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:03,328 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:03,328 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:03,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2913,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:03,529 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:03,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:03,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1496773607, now seen corresponding path program 201 times [2021-06-05 13:56:03,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:03,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856362808] [2021-06-05 13:56:03,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:03,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:03,607 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 13:56:03,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:03,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856362808] [2021-06-05 13:56:03,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856362808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:03,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993295432] [2021-06-05 13:56:03,608 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 13:56:03,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:56:03,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:03,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:03,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:03,686 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 13:56:03,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993295432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:03,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:03,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:56:03,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598700165] [2021-06-05 13:56:03,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:56:03,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:03,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:56:03,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:56:03,687 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 13:56:03,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:03,753 INFO L93 Difference]: Finished difference Result 4355 states and 12410 transitions. [2021-06-05 13:56:03,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:56:03,753 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 13:56:03,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:03,757 INFO L225 Difference]: With dead ends: 4355 [2021-06-05 13:56:03,758 INFO L226 Difference]: Without dead ends: 4355 [2021-06-05 13:56:03,758 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 66.5ms TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:56:03,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4355 states. [2021-06-05 13:56:03,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4355 to 3867. [2021-06-05 13:56:03,797 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 13:56:03,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3867 states to 3867 states and 11495 transitions. [2021-06-05 13:56:03,803 INFO L78 Accepts]: Start accepts. Automaton has 3867 states and 11495 transitions. Word has length 22 [2021-06-05 13:56:03,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:03,803 INFO L482 AbstractCegarLoop]: Abstraction has 3867 states and 11495 transitions. [2021-06-05 13:56:03,803 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 13:56:03,803 INFO L276 IsEmpty]: Start isEmpty. Operand 3867 states and 11495 transitions. [2021-06-05 13:56:03,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:03,807 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:03,807 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:04,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2914,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:04,008 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:04,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:04,008 INFO L82 PathProgramCache]: Analyzing trace with hash -374385774, now seen corresponding path program 202 times [2021-06-05 13:56:04,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:04,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364417385] [2021-06-05 13:56:04,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:04,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:04,063 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 13:56:04,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:04,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364417385] [2021-06-05 13:56:04,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364417385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:04,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128234473] [2021-06-05 13:56:04,064 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 13:56:04,088 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:56:04,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:04,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:04,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:04,128 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 13:56:04,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128234473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:04,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:04,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:56:04,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139921318] [2021-06-05 13:56:04,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:56:04,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:04,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:56:04,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:56:04,129 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 13:56:04,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:04,239 INFO L93 Difference]: Finished difference Result 4245 states and 12197 transitions. [2021-06-05 13:56:04,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:56:04,240 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 13:56:04,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:04,244 INFO L225 Difference]: With dead ends: 4245 [2021-06-05 13:56:04,244 INFO L226 Difference]: Without dead ends: 4245 [2021-06-05 13:56:04,244 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 91.3ms TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:56:04,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4245 states. [2021-06-05 13:56:04,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4245 to 3908. [2021-06-05 13:56:04,278 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 13:56:04,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3908 states to 3908 states and 11624 transitions. [2021-06-05 13:56:04,283 INFO L78 Accepts]: Start accepts. Automaton has 3908 states and 11624 transitions. Word has length 22 [2021-06-05 13:56:04,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:04,284 INFO L482 AbstractCegarLoop]: Abstraction has 3908 states and 11624 transitions. [2021-06-05 13:56:04,284 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 13:56:04,284 INFO L276 IsEmpty]: Start isEmpty. Operand 3908 states and 11624 transitions. [2021-06-05 13:56:04,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:04,287 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:04,287 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:04,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2915,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:04,488 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:04,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:04,488 INFO L82 PathProgramCache]: Analyzing trace with hash 570376209, now seen corresponding path program 203 times [2021-06-05 13:56:04,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:04,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004513662] [2021-06-05 13:56:04,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:04,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:04,544 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 13:56:04,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:04,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004513662] [2021-06-05 13:56:04,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004513662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:04,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849074297] [2021-06-05 13:56:04,544 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 13:56:04,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:56:04,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:04,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:04,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:04,603 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 13:56:04,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849074297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:04,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:04,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:56:04,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27471630] [2021-06-05 13:56:04,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:56:04,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:04,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:56:04,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:56:04,604 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 13:56:04,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:04,747 INFO L93 Difference]: Finished difference Result 4249 states and 12137 transitions. [2021-06-05 13:56:04,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:56:04,748 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 13:56:04,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:04,752 INFO L225 Difference]: With dead ends: 4249 [2021-06-05 13:56:04,752 INFO L226 Difference]: Without dead ends: 4247 [2021-06-05 13:56:04,752 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 103.5ms TimeCoverageRelationStatistics Valid=175, Invalid=287, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:56:04,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4247 states. [2021-06-05 13:56:04,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4247 to 3918. [2021-06-05 13:56:04,790 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 13:56:04,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3918 states to 3918 states and 11658 transitions. [2021-06-05 13:56:04,795 INFO L78 Accepts]: Start accepts. Automaton has 3918 states and 11658 transitions. Word has length 22 [2021-06-05 13:56:04,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:04,795 INFO L482 AbstractCegarLoop]: Abstraction has 3918 states and 11658 transitions. [2021-06-05 13:56:04,795 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 13:56:04,795 INFO L276 IsEmpty]: Start isEmpty. Operand 3918 states and 11658 transitions. [2021-06-05 13:56:04,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:04,799 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:04,799 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:04,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2916,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:04,999 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:04,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:05,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1371068916, now seen corresponding path program 204 times [2021-06-05 13:56:05,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:05,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443457349] [2021-06-05 13:56:05,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:05,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:05,064 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 13:56:05,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:05,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443457349] [2021-06-05 13:56:05,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443457349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:05,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243145825] [2021-06-05 13:56:05,065 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 13:56:05,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:56:05,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:05,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:05,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:05,143 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 13:56:05,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243145825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:05,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:05,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:56:05,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402357662] [2021-06-05 13:56:05,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:56:05,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:05,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:56:05,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:56:05,144 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 13:56:05,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:05,302 INFO L93 Difference]: Finished difference Result 4124 states and 11966 transitions. [2021-06-05 13:56:05,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:56:05,302 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 13:56:05,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:05,307 INFO L225 Difference]: With dead ends: 4124 [2021-06-05 13:56:05,307 INFO L226 Difference]: Without dead ends: 4122 [2021-06-05 13:56:05,307 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 108.6ms TimeCoverageRelationStatistics Valid=169, Invalid=293, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:56:05,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4122 states. [2021-06-05 13:56:05,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4122 to 3900. [2021-06-05 13:56:05,347 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 13:56:05,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3900 states to 3900 states and 11598 transitions. [2021-06-05 13:56:05,353 INFO L78 Accepts]: Start accepts. Automaton has 3900 states and 11598 transitions. Word has length 22 [2021-06-05 13:56:05,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:05,353 INFO L482 AbstractCegarLoop]: Abstraction has 3900 states and 11598 transitions. [2021-06-05 13:56:05,353 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 13:56:05,353 INFO L276 IsEmpty]: Start isEmpty. Operand 3900 states and 11598 transitions. [2021-06-05 13:56:05,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:05,357 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:05,357 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:05,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2917,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:05,558 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:05,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:05,558 INFO L82 PathProgramCache]: Analyzing trace with hash -2006842027, now seen corresponding path program 205 times [2021-06-05 13:56:05,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:05,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424950005] [2021-06-05 13:56:05,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:05,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:05,613 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 13:56:05,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:05,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424950005] [2021-06-05 13:56:05,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424950005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:05,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755104654] [2021-06-05 13:56:05,613 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 13:56:05,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:05,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:05,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:05,680 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 13:56:05,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755104654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:05,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:05,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:56:05,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665680433] [2021-06-05 13:56:05,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:56:05,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:05,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:56:05,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:56:05,681 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 13:56:05,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:05,746 INFO L93 Difference]: Finished difference Result 4352 states and 12338 transitions. [2021-06-05 13:56:05,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:56:05,747 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 13:56:05,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:05,752 INFO L225 Difference]: With dead ends: 4352 [2021-06-05 13:56:05,752 INFO L226 Difference]: Without dead ends: 4352 [2021-06-05 13:56:05,753 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 55.0ms TimeCoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:56:05,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4352 states. [2021-06-05 13:56:05,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4352 to 3904. [2021-06-05 13:56:05,801 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 13:56:05,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3904 states to 3904 states and 11608 transitions. [2021-06-05 13:56:05,808 INFO L78 Accepts]: Start accepts. Automaton has 3904 states and 11608 transitions. Word has length 22 [2021-06-05 13:56:05,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:05,808 INFO L482 AbstractCegarLoop]: Abstraction has 3904 states and 11608 transitions. [2021-06-05 13:56:05,808 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 13:56:05,808 INFO L276 IsEmpty]: Start isEmpty. Operand 3904 states and 11608 transitions. [2021-06-05 13:56:05,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:05,813 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:05,813 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:06,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2918,207 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:06,013 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:06,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:06,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1213285072, now seen corresponding path program 206 times [2021-06-05 13:56:06,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:06,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630913892] [2021-06-05 13:56:06,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:06,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:06,072 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 13:56:06,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:06,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630913892] [2021-06-05 13:56:06,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630913892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:06,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007113324] [2021-06-05 13:56:06,072 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 13:56:06,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:56:06,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:06,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:06,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:06,135 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 13:56:06,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007113324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:06,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:06,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 13:56:06,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814039309] [2021-06-05 13:56:06,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:56:06,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:06,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:56:06,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:56:06,136 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 13:56:06,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:06,332 INFO L93 Difference]: Finished difference Result 4085 states and 11883 transitions. [2021-06-05 13:56:06,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:56:06,333 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 13:56:06,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:06,338 INFO L225 Difference]: With dead ends: 4085 [2021-06-05 13:56:06,338 INFO L226 Difference]: Without dead ends: 4079 [2021-06-05 13:56:06,338 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 125.6ms TimeCoverageRelationStatistics Valid=194, Invalid=358, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:56:06,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4079 states. [2021-06-05 13:56:06,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4079 to 3861. [2021-06-05 13:56:06,380 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 13:56:06,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3861 states to 3861 states and 11496 transitions. [2021-06-05 13:56:06,387 INFO L78 Accepts]: Start accepts. Automaton has 3861 states and 11496 transitions. Word has length 22 [2021-06-05 13:56:06,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:06,387 INFO L482 AbstractCegarLoop]: Abstraction has 3861 states and 11496 transitions. [2021-06-05 13:56:06,387 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 13:56:06,387 INFO L276 IsEmpty]: Start isEmpty. Operand 3861 states and 11496 transitions. [2021-06-05 13:56:06,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:06,391 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:06,391 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:06,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2919 [2021-06-05 13:56:06,591 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:06,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:06,591 INFO L82 PathProgramCache]: Analyzing trace with hash 559077935, now seen corresponding path program 207 times [2021-06-05 13:56:06,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:06,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274397426] [2021-06-05 13:56:06,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:06,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:06,647 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 13:56:06,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:06,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274397426] [2021-06-05 13:56:06,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274397426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:06,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136093603] [2021-06-05 13:56:06,648 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 13:56:06,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:56:06,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:06,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:06,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:06,722 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 13:56:06,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136093603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:06,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:06,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 13:56:06,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117862453] [2021-06-05 13:56:06,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:56:06,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:06,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:56:06,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:56:06,723 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 13:56:06,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:06,806 INFO L93 Difference]: Finished difference Result 4587 states and 12943 transitions. [2021-06-05 13:56:06,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:56:06,806 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 13:56:06,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:06,811 INFO L225 Difference]: With dead ends: 4587 [2021-06-05 13:56:06,811 INFO L226 Difference]: Without dead ends: 4587 [2021-06-05 13:56:06,811 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 71.7ms TimeCoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:56:06,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4587 states. [2021-06-05 13:56:06,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4587 to 3836. [2021-06-05 13:56:06,853 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 13:56:06,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3836 states to 3836 states and 11403 transitions. [2021-06-05 13:56:06,858 INFO L78 Accepts]: Start accepts. Automaton has 3836 states and 11403 transitions. Word has length 22 [2021-06-05 13:56:06,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:06,858 INFO L482 AbstractCegarLoop]: Abstraction has 3836 states and 11403 transitions. [2021-06-05 13:56:06,859 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 13:56:06,859 INFO L276 IsEmpty]: Start isEmpty. Operand 3836 states and 11403 transitions. [2021-06-05 13:56:06,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:06,862 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:06,862 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:07,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2920 [2021-06-05 13:56:07,063 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:07,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:07,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1612288028, now seen corresponding path program 208 times [2021-06-05 13:56:07,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:07,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50378842] [2021-06-05 13:56:07,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:07,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:07,115 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 13:56:07,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:07,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50378842] [2021-06-05 13:56:07,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50378842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:07,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970065890] [2021-06-05 13:56:07,116 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 13:56:07,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:56:07,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:07,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:07,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:07,181 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 13:56:07,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970065890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:07,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:07,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:56:07,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68781063] [2021-06-05 13:56:07,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:56:07,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:07,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:56:07,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:56:07,182 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 13:56:07,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:07,295 INFO L93 Difference]: Finished difference Result 4225 states and 12107 transitions. [2021-06-05 13:56:07,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:56:07,295 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 13:56:07,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:07,300 INFO L225 Difference]: With dead ends: 4225 [2021-06-05 13:56:07,300 INFO L226 Difference]: Without dead ends: 4225 [2021-06-05 13:56:07,300 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 81.9ms TimeCoverageRelationStatistics Valid=134, Invalid=208, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:56:07,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4225 states. [2021-06-05 13:56:07,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4225 to 3857. [2021-06-05 13:56:07,341 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 13:56:07,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3857 states to 3857 states and 11472 transitions. [2021-06-05 13:56:07,346 INFO L78 Accepts]: Start accepts. Automaton has 3857 states and 11472 transitions. Word has length 22 [2021-06-05 13:56:07,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:07,346 INFO L482 AbstractCegarLoop]: Abstraction has 3857 states and 11472 transitions. [2021-06-05 13:56:07,347 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 13:56:07,347 INFO L276 IsEmpty]: Start isEmpty. Operand 3857 states and 11472 transitions. [2021-06-05 13:56:07,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:07,350 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:07,350 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:07,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2921 [2021-06-05 13:56:07,551 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:07,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:07,551 INFO L82 PathProgramCache]: Analyzing trace with hash -667526045, now seen corresponding path program 209 times [2021-06-05 13:56:07,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:07,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159440225] [2021-06-05 13:56:07,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:07,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:07,602 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 13:56:07,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:07,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159440225] [2021-06-05 13:56:07,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159440225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:07,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012645658] [2021-06-05 13:56:07,603 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 13:56:07,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:56:07,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:07,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:07,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:07,664 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 13:56:07,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012645658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:07,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:07,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:56:07,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2157279] [2021-06-05 13:56:07,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:56:07,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:07,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:56:07,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:56:07,665 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 13:56:07,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:07,808 INFO L93 Difference]: Finished difference Result 4205 states and 11997 transitions. [2021-06-05 13:56:07,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:56:07,808 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 13:56:07,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:07,813 INFO L225 Difference]: With dead ends: 4205 [2021-06-05 13:56:07,813 INFO L226 Difference]: Without dead ends: 4203 [2021-06-05 13:56:07,813 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 101.5ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:56:07,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4203 states. [2021-06-05 13:56:07,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4203 to 3869. [2021-06-05 13:56:07,853 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 13:56:07,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3869 states to 3869 states and 11512 transitions. [2021-06-05 13:56:07,858 INFO L78 Accepts]: Start accepts. Automaton has 3869 states and 11512 transitions. Word has length 22 [2021-06-05 13:56:07,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:07,859 INFO L482 AbstractCegarLoop]: Abstraction has 3869 states and 11512 transitions. [2021-06-05 13:56:07,859 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 13:56:07,859 INFO L276 IsEmpty]: Start isEmpty. Operand 3869 states and 11512 transitions. [2021-06-05 13:56:07,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:07,862 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:07,862 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:08,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2922,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:08,064 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:08,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:08,064 INFO L82 PathProgramCache]: Analyzing trace with hash 133166662, now seen corresponding path program 210 times [2021-06-05 13:56:08,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:08,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276376254] [2021-06-05 13:56:08,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:08,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:08,118 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 13:56:08,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:08,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276376254] [2021-06-05 13:56:08,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276376254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:08,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150204193] [2021-06-05 13:56:08,118 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 13:56:08,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 13:56:08,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:08,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:08,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:08,194 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 13:56:08,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150204193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:08,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:08,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:56:08,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641228435] [2021-06-05 13:56:08,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:56:08,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:08,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:56:08,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:56:08,195 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 13:56:08,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:08,369 INFO L93 Difference]: Finished difference Result 4090 states and 11844 transitions. [2021-06-05 13:56:08,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:56:08,370 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 13:56:08,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:08,374 INFO L225 Difference]: With dead ends: 4090 [2021-06-05 13:56:08,374 INFO L226 Difference]: Without dead ends: 4088 [2021-06-05 13:56:08,375 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 107.9ms TimeCoverageRelationStatistics Valid=170, Invalid=292, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:56:08,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4088 states. [2021-06-05 13:56:08,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4088 to 3838. [2021-06-05 13:56:08,418 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 13:56:08,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 11409 transitions. [2021-06-05 13:56:08,424 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 11409 transitions. Word has length 22 [2021-06-05 13:56:08,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:08,424 INFO L482 AbstractCegarLoop]: Abstraction has 3838 states and 11409 transitions. [2021-06-05 13:56:08,424 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 13:56:08,424 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 11409 transitions. [2021-06-05 13:56:08,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:08,427 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:08,427 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:08,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2923,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:08,628 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:08,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:08,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1050223015, now seen corresponding path program 211 times [2021-06-05 13:56:08,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:08,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661714660] [2021-06-05 13:56:08,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:08,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:08,678 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 13:56:08,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:08,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661714660] [2021-06-05 13:56:08,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661714660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:08,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391679603] [2021-06-05 13:56:08,679 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 13:56:08,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:08,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:08,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:08,743 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 13:56:08,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391679603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:08,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:08,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:56:08,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062855853] [2021-06-05 13:56:08,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:56:08,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:08,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:56:08,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:56:08,744 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 13:56:08,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:08,806 INFO L93 Difference]: Finished difference Result 4172 states and 11863 transitions. [2021-06-05 13:56:08,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:56:08,807 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 13:56:08,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:08,811 INFO L225 Difference]: With dead ends: 4172 [2021-06-05 13:56:08,812 INFO L226 Difference]: Without dead ends: 4172 [2021-06-05 13:56:08,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 50.1ms TimeCoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:56:08,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4172 states. [2021-06-05 13:56:08,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4172 to 3828. [2021-06-05 13:56:08,855 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 13:56:08,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3828 states to 3828 states and 11366 transitions. [2021-06-05 13:56:08,861 INFO L78 Accepts]: Start accepts. Automaton has 3828 states and 11366 transitions. Word has length 22 [2021-06-05 13:56:08,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:08,861 INFO L482 AbstractCegarLoop]: Abstraction has 3828 states and 11366 transitions. [2021-06-05 13:56:08,861 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 13:56:08,861 INFO L276 IsEmpty]: Start isEmpty. Operand 3828 states and 11366 transitions. [2021-06-05 13:56:08,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:08,865 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:08,865 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:09,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2924,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:09,066 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:09,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:09,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1843779970, now seen corresponding path program 212 times [2021-06-05 13:56:09,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:09,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097205073] [2021-06-05 13:56:09,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:09,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:09,125 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 13:56:09,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:09,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097205073] [2021-06-05 13:56:09,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097205073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:09,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071625853] [2021-06-05 13:56:09,125 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 13:56:09,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:56:09,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:09,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:09,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:09,183 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 13:56:09,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071625853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:09,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:09,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:56:09,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927735820] [2021-06-05 13:56:09,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:56:09,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:09,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:56:09,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:56:09,184 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 13:56:09,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:09,346 INFO L93 Difference]: Finished difference Result 4046 states and 11697 transitions. [2021-06-05 13:56:09,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:56:09,347 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 13:56:09,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:09,352 INFO L225 Difference]: With dead ends: 4046 [2021-06-05 13:56:09,352 INFO L226 Difference]: Without dead ends: 4044 [2021-06-05 13:56:09,352 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 107.3ms TimeCoverageRelationStatistics Valid=195, Invalid=357, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:56:09,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4044 states. [2021-06-05 13:56:09,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4044 to 3828. [2021-06-05 13:56:09,393 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 13:56:09,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3828 states to 3828 states and 11364 transitions. [2021-06-05 13:56:09,399 INFO L78 Accepts]: Start accepts. Automaton has 3828 states and 11364 transitions. Word has length 22 [2021-06-05 13:56:09,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:09,399 INFO L482 AbstractCegarLoop]: Abstraction has 3828 states and 11364 transitions. [2021-06-05 13:56:09,399 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 13:56:09,399 INFO L276 IsEmpty]: Start isEmpty. Operand 3828 states and 11364 transitions. [2021-06-05 13:56:09,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:09,403 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:09,403 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:09,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2925,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:09,604 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:09,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:09,604 INFO L82 PathProgramCache]: Analyzing trace with hash -678824319, now seen corresponding path program 213 times [2021-06-05 13:56:09,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:09,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661552000] [2021-06-05 13:56:09,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:09,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:09,660 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 13:56:09,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:09,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661552000] [2021-06-05 13:56:09,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661552000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:09,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685782550] [2021-06-05 13:56:09,660 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 13:56:09,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:56:09,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:09,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:09,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:09,730 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 13:56:09,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685782550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:09,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:09,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:56:09,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908326536] [2021-06-05 13:56:09,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:56:09,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:09,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:56:09,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:56:09,731 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 13:56:09,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:09,822 INFO L93 Difference]: Finished difference Result 4424 states and 12469 transitions. [2021-06-05 13:56:09,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:56:09,822 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 13:56:09,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:09,826 INFO L225 Difference]: With dead ends: 4424 [2021-06-05 13:56:09,827 INFO L226 Difference]: Without dead ends: 4424 [2021-06-05 13:56:09,827 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 66.6ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:56:09,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4424 states. [2021-06-05 13:56:09,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4424 to 3838. [2021-06-05 13:56:09,867 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 13:56:09,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 11392 transitions. [2021-06-05 13:56:09,873 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 11392 transitions. Word has length 22 [2021-06-05 13:56:09,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:09,873 INFO L482 AbstractCegarLoop]: Abstraction has 3838 states and 11392 transitions. [2021-06-05 13:56:09,874 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 13:56:09,874 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 11392 transitions. [2021-06-05 13:56:09,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:09,877 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:09,877 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:10,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2926,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:10,078 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:10,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:10,078 INFO L82 PathProgramCache]: Analyzing trace with hash -961782330, now seen corresponding path program 214 times [2021-06-05 13:56:10,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:10,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138016420] [2021-06-05 13:56:10,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:10,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:10,139 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 13:56:10,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:10,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138016420] [2021-06-05 13:56:10,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138016420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:10,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166108909] [2021-06-05 13:56:10,139 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 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 13:56:10,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:56:10,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:10,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:10,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:10,197 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 13:56:10,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166108909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:10,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:10,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:56:10,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819034780] [2021-06-05 13:56:10,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:56:10,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:10,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:56:10,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:56:10,198 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 13:56:10,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:10,335 INFO L93 Difference]: Finished difference Result 4109 states and 11999 transitions. [2021-06-05 13:56:10,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:56:10,335 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 13:56:10,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:10,339 INFO L225 Difference]: With dead ends: 4109 [2021-06-05 13:56:10,339 INFO L226 Difference]: Without dead ends: 4106 [2021-06-05 13:56:10,339 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 108.1ms TimeCoverageRelationStatistics Valid=188, Invalid=364, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:56:10,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4106 states. [2021-06-05 13:56:10,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4106 to 3841. [2021-06-05 13:56:10,376 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 13:56:10,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3841 states to 3841 states and 11399 transitions. [2021-06-05 13:56:10,381 INFO L78 Accepts]: Start accepts. Automaton has 3841 states and 11399 transitions. Word has length 22 [2021-06-05 13:56:10,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:10,381 INFO L482 AbstractCegarLoop]: Abstraction has 3841 states and 11399 transitions. [2021-06-05 13:56:10,381 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 13:56:10,381 INFO L276 IsEmpty]: Start isEmpty. Operand 3841 states and 11399 transitions. [2021-06-05 13:56:10,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:10,385 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:10,385 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:10,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2927,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:10,585 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:10,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:10,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1555283175, now seen corresponding path program 215 times [2021-06-05 13:56:10,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:10,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210751370] [2021-06-05 13:56:10,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:10,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:10,643 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 13:56:10,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:10,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210751370] [2021-06-05 13:56:10,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210751370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:10,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531859545] [2021-06-05 13:56:10,644 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 13:56:10,669 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:56:10,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:10,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:10,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:10,710 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 13:56:10,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531859545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:10,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:10,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:56:10,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152843877] [2021-06-05 13:56:10,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:56:10,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:10,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:56:10,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:56:10,711 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 13:56:10,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:10,814 INFO L93 Difference]: Finished difference Result 5862 states and 16951 transitions. [2021-06-05 13:56:10,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:56:10,814 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 13:56:10,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:10,820 INFO L225 Difference]: With dead ends: 5862 [2021-06-05 13:56:10,820 INFO L226 Difference]: Without dead ends: 5862 [2021-06-05 13:56:10,820 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 87.2ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:56:10,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5862 states. [2021-06-05 13:56:10,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5862 to 5031. [2021-06-05 13:56:10,870 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 13:56:10,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5031 states to 5031 states and 15236 transitions. [2021-06-05 13:56:10,877 INFO L78 Accepts]: Start accepts. Automaton has 5031 states and 15236 transitions. Word has length 22 [2021-06-05 13:56:10,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:10,878 INFO L482 AbstractCegarLoop]: Abstraction has 5031 states and 15236 transitions. [2021-06-05 13:56:10,878 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 13:56:10,878 INFO L276 IsEmpty]: Start isEmpty. Operand 5031 states and 15236 transitions. [2021-06-05 13:56:10,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:10,882 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:10,882 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:11,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2928,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:11,082 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:11,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:11,083 INFO L82 PathProgramCache]: Analyzing trace with hash -69053073, now seen corresponding path program 216 times [2021-06-05 13:56:11,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:11,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949727816] [2021-06-05 13:56:11,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:11,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:11,132 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 13:56:11,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:11,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949727816] [2021-06-05 13:56:11,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949727816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:11,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071478913] [2021-06-05 13:56:11,132 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 13:56:11,160 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:56:11,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:11,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:11,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:11,195 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 13:56:11,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071478913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:11,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:11,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 13:56:11,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438373913] [2021-06-05 13:56:11,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:56:11,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:11,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:56:11,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:56:11,195 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 13:56:11,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:11,339 INFO L93 Difference]: Finished difference Result 5380 states and 15831 transitions. [2021-06-05 13:56:11,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:56:11,339 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 13:56:11,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:11,346 INFO L225 Difference]: With dead ends: 5380 [2021-06-05 13:56:11,346 INFO L226 Difference]: Without dead ends: 5376 [2021-06-05 13:56:11,346 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 96.1ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:56:11,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5376 states. [2021-06-05 13:56:11,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5376 to 5084. [2021-06-05 13:56:11,409 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 13:56:11,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5084 states to 5084 states and 15419 transitions. [2021-06-05 13:56:11,418 INFO L78 Accepts]: Start accepts. Automaton has 5084 states and 15419 transitions. Word has length 22 [2021-06-05 13:56:11,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:11,418 INFO L482 AbstractCegarLoop]: Abstraction has 5084 states and 15419 transitions. [2021-06-05 13:56:11,418 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 13:56:11,418 INFO L276 IsEmpty]: Start isEmpty. Operand 5084 states and 15419 transitions. [2021-06-05 13:56:11,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:11,424 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:11,424 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:11,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2929,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:11,624 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:11,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:11,625 INFO L82 PathProgramCache]: Analyzing trace with hash -175700274, now seen corresponding path program 217 times [2021-06-05 13:56:11,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:11,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931618283] [2021-06-05 13:56:11,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:11,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:11,694 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 13:56:11,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:11,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931618283] [2021-06-05 13:56:11,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931618283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:11,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182478384] [2021-06-05 13:56:11,695 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 13:56:11,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:11,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:11,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:11,765 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 13:56:11,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182478384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:11,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:11,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:56:11,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045394714] [2021-06-05 13:56:11,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:56:11,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:11,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:56:11,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:56:11,766 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 13:56:11,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:11,948 INFO L93 Difference]: Finished difference Result 5286 states and 15759 transitions. [2021-06-05 13:56:11,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:56:11,948 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 13:56:11,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:11,955 INFO L225 Difference]: With dead ends: 5286 [2021-06-05 13:56:11,956 INFO L226 Difference]: Without dead ends: 5280 [2021-06-05 13:56:11,956 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 127.1ms TimeCoverageRelationStatistics Valid=189, Invalid=363, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:56:11,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5280 states. [2021-06-05 13:56:12,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5280 to 5075. [2021-06-05 13:56:12,029 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 13:56:12,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5075 states to 5075 states and 15395 transitions. [2021-06-05 13:56:12,040 INFO L78 Accepts]: Start accepts. Automaton has 5075 states and 15395 transitions. Word has length 22 [2021-06-05 13:56:12,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:12,041 INFO L482 AbstractCegarLoop]: Abstraction has 5075 states and 15395 transitions. [2021-06-05 13:56:12,041 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 13:56:12,041 INFO L276 IsEmpty]: Start isEmpty. Operand 5075 states and 15395 transitions. [2021-06-05 13:56:12,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:12,047 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:12,047 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:12,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2930 [2021-06-05 13:56:12,270 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:12,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:12,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1953602065, now seen corresponding path program 218 times [2021-06-05 13:56:12,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:12,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755713370] [2021-06-05 13:56:12,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:12,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:12,327 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 13:56:12,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:12,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755713370] [2021-06-05 13:56:12,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755713370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:12,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248667848] [2021-06-05 13:56:12,327 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 13:56:12,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:56:12,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:12,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:12,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:12,391 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 13:56:12,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248667848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:12,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:12,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:56:12,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648070073] [2021-06-05 13:56:12,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:56:12,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:12,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:56:12,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:56:12,391 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 13:56:12,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:12,494 INFO L93 Difference]: Finished difference Result 6136 states and 17834 transitions. [2021-06-05 13:56:12,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:56:12,494 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 13:56:12,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:12,500 INFO L225 Difference]: With dead ends: 6136 [2021-06-05 13:56:12,501 INFO L226 Difference]: Without dead ends: 6136 [2021-06-05 13:56:12,501 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 86.6ms TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:56:12,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6136 states. [2021-06-05 13:56:12,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6136 to 3901. [2021-06-05 13:56:12,556 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 13:56:12,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3901 states to 3901 states and 11644 transitions. [2021-06-05 13:56:12,561 INFO L78 Accepts]: Start accepts. Automaton has 3901 states and 11644 transitions. Word has length 22 [2021-06-05 13:56:12,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:12,561 INFO L482 AbstractCegarLoop]: Abstraction has 3901 states and 11644 transitions. [2021-06-05 13:56:12,561 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 13:56:12,561 INFO L276 IsEmpty]: Start isEmpty. Operand 3901 states and 11644 transitions. [2021-06-05 13:56:12,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:12,565 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:12,565 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:12,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2931 [2021-06-05 13:56:12,765 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:12,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:12,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1332552238, now seen corresponding path program 219 times [2021-06-05 13:56:12,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:12,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157689350] [2021-06-05 13:56:12,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:12,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:12,815 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 13:56:12,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:12,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157689350] [2021-06-05 13:56:12,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157689350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:12,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108001954] [2021-06-05 13:56:12,815 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 13:56:12,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:56:12,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:12,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 13:56:12,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:12,976 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 13:56:12,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108001954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:12,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:12,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-06-05 13:56:12,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360058102] [2021-06-05 13:56:12,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:56:12,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:12,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:56:12,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:56:12,977 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 13:56:14,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:14,157 INFO L93 Difference]: Finished difference Result 9069 states and 26193 transitions. [2021-06-05 13:56:14,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-06-05 13:56:14,158 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 13:56:14,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:14,168 INFO L225 Difference]: With dead ends: 9069 [2021-06-05 13:56:14,169 INFO L226 Difference]: Without dead ends: 9055 [2021-06-05 13:56:14,169 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3104 ImplicationChecksByTransitivity, 910.0ms TimeCoverageRelationStatistics Valid=1057, Invalid=8255, Unknown=0, NotChecked=0, Total=9312 [2021-06-05 13:56:14,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9055 states. [2021-06-05 13:56:14,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9055 to 5387. [2021-06-05 13:56:14,253 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 13:56:14,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5387 states to 5387 states and 15853 transitions. [2021-06-05 13:56:14,262 INFO L78 Accepts]: Start accepts. Automaton has 5387 states and 15853 transitions. Word has length 22 [2021-06-05 13:56:14,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:14,262 INFO L482 AbstractCegarLoop]: Abstraction has 5387 states and 15853 transitions. [2021-06-05 13:56:14,262 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 13:56:14,262 INFO L276 IsEmpty]: Start isEmpty. Operand 5387 states and 15853 transitions. [2021-06-05 13:56:14,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:14,267 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:14,267 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:14,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2932,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:14,468 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:14,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:14,468 INFO L82 PathProgramCache]: Analyzing trace with hash -387790255, now seen corresponding path program 220 times [2021-06-05 13:56:14,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:14,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633936532] [2021-06-05 13:56:14,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:14,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:14,517 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 13:56:14,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:14,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633936532] [2021-06-05 13:56:14,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633936532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:14,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882187452] [2021-06-05 13:56:14,517 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 13:56:14,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:56:14,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:14,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:14,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:14,576 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 13:56:14,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882187452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:14,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:14,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:56:14,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615255086] [2021-06-05 13:56:14,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:56:14,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:14,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:56:14,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:56:14,577 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 13:56:14,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:14,717 INFO L93 Difference]: Finished difference Result 5771 states and 16395 transitions. [2021-06-05 13:56:14,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:56:14,718 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 13:56:14,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:14,724 INFO L225 Difference]: With dead ends: 5771 [2021-06-05 13:56:14,724 INFO L226 Difference]: Without dead ends: 5767 [2021-06-05 13:56:14,724 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 96.2ms TimeCoverageRelationStatistics Valid=173, Invalid=289, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:56:14,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5767 states. [2021-06-05 13:56:14,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5767 to 5367. [2021-06-05 13:56:14,783 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 13:56:14,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5367 states to 5367 states and 15778 transitions. [2021-06-05 13:56:14,791 INFO L78 Accepts]: Start accepts. Automaton has 5367 states and 15778 transitions. Word has length 22 [2021-06-05 13:56:14,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:14,791 INFO L482 AbstractCegarLoop]: Abstraction has 5367 states and 15778 transitions. [2021-06-05 13:56:14,791 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 13:56:14,791 INFO L276 IsEmpty]: Start isEmpty. Operand 5367 states and 15778 transitions. [2021-06-05 13:56:14,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:14,796 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:14,796 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:14,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2933 [2021-06-05 13:56:14,997 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:14,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:14,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1329958805, now seen corresponding path program 221 times [2021-06-05 13:56:14,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:14,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163347970] [2021-06-05 13:56:14,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:14,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:15,049 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 13:56:15,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:15,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163347970] [2021-06-05 13:56:15,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163347970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:15,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009780341] [2021-06-05 13:56:15,050 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 13:56:15,075 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 13:56:15,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:15,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:15,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:15,114 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 13:56:15,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009780341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:15,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:15,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:56:15,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521071801] [2021-06-05 13:56:15,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:56:15,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:15,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:56:15,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:56:15,115 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 13:56:15,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:15,186 INFO L93 Difference]: Finished difference Result 5976 states and 16857 transitions. [2021-06-05 13:56:15,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:56:15,187 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 13:56:15,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:15,193 INFO L225 Difference]: With dead ends: 5976 [2021-06-05 13:56:15,193 INFO L226 Difference]: Without dead ends: 5976 [2021-06-05 13:56:15,193 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 52.2ms TimeCoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:56:15,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5976 states. [2021-06-05 13:56:15,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5976 to 5368. [2021-06-05 13:56:15,251 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 13:56:15,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5368 states to 5368 states and 15769 transitions. [2021-06-05 13:56:15,260 INFO L78 Accepts]: Start accepts. Automaton has 5368 states and 15769 transitions. Word has length 22 [2021-06-05 13:56:15,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:15,260 INFO L482 AbstractCegarLoop]: Abstraction has 5368 states and 15769 transitions. [2021-06-05 13:56:15,260 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 13:56:15,260 INFO L276 IsEmpty]: Start isEmpty. Operand 5368 states and 15769 transitions. [2021-06-05 13:56:15,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:15,265 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:15,265 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:15,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2934,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:15,466 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:15,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:15,466 INFO L82 PathProgramCache]: Analyzing trace with hash -399088529, now seen corresponding path program 222 times [2021-06-05 13:56:15,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:15,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484588673] [2021-06-05 13:56:15,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:15,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:15,516 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 13:56:15,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:15,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484588673] [2021-06-05 13:56:15,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484588673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:15,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160118140] [2021-06-05 13:56:15,516 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 13:56:15,542 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 13:56:15,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:15,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:15,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:15,590 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 13:56:15,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160118140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:15,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:15,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 13:56:15,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637208361] [2021-06-05 13:56:15,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:56:15,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:15,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:56:15,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:56:15,591 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 13:56:15,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:15,665 INFO L93 Difference]: Finished difference Result 5731 states and 16223 transitions. [2021-06-05 13:56:15,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:56:15,666 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 13:56:15,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:15,672 INFO L225 Difference]: With dead ends: 5731 [2021-06-05 13:56:15,672 INFO L226 Difference]: Without dead ends: 5731 [2021-06-05 13:56:15,672 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 60.8ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:56:15,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5731 states. [2021-06-05 13:56:15,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5731 to 5320. [2021-06-05 13:56:15,729 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 13:56:15,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5320 states to 5320 states and 15602 transitions. [2021-06-05 13:56:15,737 INFO L78 Accepts]: Start accepts. Automaton has 5320 states and 15602 transitions. Word has length 22 [2021-06-05 13:56:15,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:15,737 INFO L482 AbstractCegarLoop]: Abstraction has 5320 states and 15602 transitions. [2021-06-05 13:56:15,737 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 13:56:15,737 INFO L276 IsEmpty]: Start isEmpty. Operand 5320 states and 15602 transitions. [2021-06-05 13:56:15,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:15,742 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:15,742 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:15,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2935 [2021-06-05 13:56:15,943 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:15,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:15,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1835018965, now seen corresponding path program 223 times [2021-06-05 13:56:15,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:15,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768462067] [2021-06-05 13:56:15,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:15,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:16,001 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 13:56:16,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:16,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768462067] [2021-06-05 13:56:16,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768462067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:16,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623444223] [2021-06-05 13:56:16,001 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 13:56:16,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:16,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:16,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:16,071 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 13:56:16,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623444223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:16,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:16,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 13:56:16,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266770951] [2021-06-05 13:56:16,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:56:16,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:16,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:56:16,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:56:16,072 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 13:56:16,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:16,184 INFO L93 Difference]: Finished difference Result 6238 states and 17516 transitions. [2021-06-05 13:56:16,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:56:16,184 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 13:56:16,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:16,192 INFO L225 Difference]: With dead ends: 6238 [2021-06-05 13:56:16,192 INFO L226 Difference]: Without dead ends: 6238 [2021-06-05 13:56:16,192 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 86.9ms TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:56:16,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6238 states. [2021-06-05 13:56:16,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6238 to 5233. [2021-06-05 13:56:16,263 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 13:56:16,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5233 states to 5233 states and 15290 transitions. [2021-06-05 13:56:16,272 INFO L78 Accepts]: Start accepts. Automaton has 5233 states and 15290 transitions. Word has length 22 [2021-06-05 13:56:16,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:16,272 INFO L482 AbstractCegarLoop]: Abstraction has 5233 states and 15290 transitions. [2021-06-05 13:56:16,272 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 13:56:16,273 INFO L276 IsEmpty]: Start isEmpty. Operand 5233 states and 15290 transitions. [2021-06-05 13:56:16,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:16,278 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:16,278 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:16,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2936,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:16,479 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:16,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:16,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1922092753, now seen corresponding path program 224 times [2021-06-05 13:56:16,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:16,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473418862] [2021-06-05 13:56:16,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:16,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:16,542 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 13:56:16,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:16,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473418862] [2021-06-05 13:56:16,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473418862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:16,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570460759] [2021-06-05 13:56:16,543 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 13:56:16,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:56:16,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:16,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:16,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:16,613 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 13:56:16,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570460759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:16,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:16,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 13:56:16,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486266607] [2021-06-05 13:56:16,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:56:16,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:16,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:56:16,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:56:16,614 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 13:56:16,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:16,770 INFO L93 Difference]: Finished difference Result 8227 states and 23267 transitions. [2021-06-05 13:56:16,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:56:16,771 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 13:56:16,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:16,780 INFO L225 Difference]: With dead ends: 8227 [2021-06-05 13:56:16,780 INFO L226 Difference]: Without dead ends: 8227 [2021-06-05 13:56:16,781 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 119.2ms TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:56:16,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8227 states. [2021-06-05 13:56:16,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8227 to 6539. [2021-06-05 13:56:16,856 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 13:56:16,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6539 states to 6539 states and 19367 transitions. [2021-06-05 13:56:16,865 INFO L78 Accepts]: Start accepts. Automaton has 6539 states and 19367 transitions. Word has length 22 [2021-06-05 13:56:16,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:16,865 INFO L482 AbstractCegarLoop]: Abstraction has 6539 states and 19367 transitions. [2021-06-05 13:56:16,866 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 13:56:16,866 INFO L276 IsEmpty]: Start isEmpty. Operand 6539 states and 19367 transitions. [2021-06-05 13:56:16,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:16,871 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:16,871 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:17,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2937,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:17,072 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:17,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:17,072 INFO L82 PathProgramCache]: Analyzing trace with hash 971614503, now seen corresponding path program 225 times [2021-06-05 13:56:17,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:17,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551171713] [2021-06-05 13:56:17,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:17,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:17,131 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 13:56:17,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:17,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551171713] [2021-06-05 13:56:17,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551171713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:17,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833426796] [2021-06-05 13:56:17,131 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 13:56:17,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 13:56:17,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:17,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:17,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:17,200 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 13:56:17,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833426796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:17,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:17,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 13:56:17,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614979757] [2021-06-05 13:56:17,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:56:17,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:17,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:56:17,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:56:17,201 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 13:56:17,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:17,340 INFO L93 Difference]: Finished difference Result 8105 states and 23072 transitions. [2021-06-05 13:56:17,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:56:17,340 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 13:56:17,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:17,349 INFO L225 Difference]: With dead ends: 8105 [2021-06-05 13:56:17,349 INFO L226 Difference]: Without dead ends: 8105 [2021-06-05 13:56:17,349 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 108.5ms TimeCoverageRelationStatistics Valid=199, Invalid=353, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:56:17,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8105 states. [2021-06-05 13:56:17,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8105 to 5159. [2021-06-05 13:56:17,436 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 13:56:17,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5159 states to 5159 states and 15108 transitions. [2021-06-05 13:56:17,444 INFO L78 Accepts]: Start accepts. Automaton has 5159 states and 15108 transitions. Word has length 22 [2021-06-05 13:56:17,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:17,444 INFO L482 AbstractCegarLoop]: Abstraction has 5159 states and 15108 transitions. [2021-06-05 13:56:17,444 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 13:56:17,444 INFO L276 IsEmpty]: Start isEmpty. Operand 5159 states and 15108 transitions. [2021-06-05 13:56:17,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:17,448 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:17,448 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:17,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2938,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:17,649 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:17,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:17,649 INFO L82 PathProgramCache]: Analyzing trace with hash -305915357, now seen corresponding path program 226 times [2021-06-05 13:56:17,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:17,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437945705] [2021-06-05 13:56:17,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:17,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:17,695 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 13:56:17,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:17,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437945705] [2021-06-05 13:56:17,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437945705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:17,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228095097] [2021-06-05 13:56:17,696 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 13:56:17,719 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:56:17,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:17,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:17,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:17,753 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 13:56:17,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228095097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:17,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:17,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:56:17,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752464421] [2021-06-05 13:56:17,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:56:17,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:17,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:56:17,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:56:17,754 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 13:56:17,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:17,887 INFO L93 Difference]: Finished difference Result 5517 states and 15611 transitions. [2021-06-05 13:56:17,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:56:17,887 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 13:56:17,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:17,893 INFO L225 Difference]: With dead ends: 5517 [2021-06-05 13:56:17,893 INFO L226 Difference]: Without dead ends: 5513 [2021-06-05 13:56:17,894 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 92.3ms TimeCoverageRelationStatistics Valid=172, Invalid=290, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:56:17,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5513 states. [2021-06-05 13:56:17,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5513 to 5171. [2021-06-05 13:56:17,959 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 13:56:17,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5171 states to 5171 states and 15137 transitions. [2021-06-05 13:56:17,967 INFO L78 Accepts]: Start accepts. Automaton has 5171 states and 15137 transitions. Word has length 22 [2021-06-05 13:56:17,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:17,967 INFO L482 AbstractCegarLoop]: Abstraction has 5171 states and 15137 transitions. [2021-06-05 13:56:17,967 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 13:56:17,967 INFO L276 IsEmpty]: Start isEmpty. Operand 5171 states and 15137 transitions. [2021-06-05 13:56:17,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:17,971 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:17,972 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:18,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2939,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:18,172 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:18,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:18,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1411833703, now seen corresponding path program 227 times [2021-06-05 13:56:18,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:18,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214319780] [2021-06-05 13:56:18,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:18,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:18,219 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 13:56:18,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:18,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214319780] [2021-06-05 13:56:18,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214319780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:18,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777164235] [2021-06-05 13:56:18,219 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 13:56:18,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 13:56:18,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:18,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:18,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:18,284 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 13:56:18,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777164235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:18,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:18,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:56:18,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104536016] [2021-06-05 13:56:18,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:56:18,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:18,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:56:18,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:56:18,285 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 13:56:18,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:18,361 INFO L93 Difference]: Finished difference Result 5892 states and 16526 transitions. [2021-06-05 13:56:18,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:56:18,362 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 13:56:18,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:18,368 INFO L225 Difference]: With dead ends: 5892 [2021-06-05 13:56:18,368 INFO L226 Difference]: Without dead ends: 5892 [2021-06-05 13:56:18,368 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 56.9ms TimeCoverageRelationStatistics Valid=100, Invalid=140, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:56:18,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5892 states. [2021-06-05 13:56:18,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5892 to 5183. [2021-06-05 13:56:18,435 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 13:56:18,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5183 states to 5183 states and 15163 transitions. [2021-06-05 13:56:18,443 INFO L78 Accepts]: Start accepts. Automaton has 5183 states and 15163 transitions. Word has length 22 [2021-06-05 13:56:18,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:18,444 INFO L482 AbstractCegarLoop]: Abstraction has 5183 states and 15163 transitions. [2021-06-05 13:56:18,444 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 13:56:18,444 INFO L276 IsEmpty]: Start isEmpty. Operand 5183 states and 15163 transitions. [2021-06-05 13:56:18,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:18,449 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:18,449 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:18,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2940 [2021-06-05 13:56:18,650 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:18,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:18,650 INFO L82 PathProgramCache]: Analyzing trace with hash -317213631, now seen corresponding path program 228 times [2021-06-05 13:56:18,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:18,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154629988] [2021-06-05 13:56:18,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:18,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:18,702 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 13:56:18,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:18,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154629988] [2021-06-05 13:56:18,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154629988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:18,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67063061] [2021-06-05 13:56:18,703 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 13:56:18,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 13:56:18,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:18,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:18,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:18,769 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 13:56:18,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67063061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:18,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:18,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:56:18,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421779460] [2021-06-05 13:56:18,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:56:18,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:18,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:56:18,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:56:18,770 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 13:56:18,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:18,859 INFO L93 Difference]: Finished difference Result 5922 states and 16620 transitions. [2021-06-05 13:56:18,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:56:18,859 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 13:56:18,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:18,866 INFO L225 Difference]: With dead ends: 5922 [2021-06-05 13:56:18,867 INFO L226 Difference]: Without dead ends: 5922 [2021-06-05 13:56:18,867 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 69.2ms TimeCoverageRelationStatistics Valid=119, Invalid=187, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:56:18,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5922 states. [2021-06-05 13:56:18,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5922 to 5178. [2021-06-05 13:56:18,929 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 13:56:18,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5178 states to 5178 states and 15141 transitions. [2021-06-05 13:56:18,938 INFO L78 Accepts]: Start accepts. Automaton has 5178 states and 15141 transitions. Word has length 22 [2021-06-05 13:56:18,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:18,938 INFO L482 AbstractCegarLoop]: Abstraction has 5178 states and 15141 transitions. [2021-06-05 13:56:18,938 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 13:56:18,939 INFO L276 IsEmpty]: Start isEmpty. Operand 5178 states and 15141 transitions. [2021-06-05 13:56:18,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:18,944 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:18,944 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:19,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2941 [2021-06-05 13:56:19,145 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:19,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:19,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1916893863, now seen corresponding path program 229 times [2021-06-05 13:56:19,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:19,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081302020] [2021-06-05 13:56:19,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:19,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:19,199 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 13:56:19,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:19,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081302020] [2021-06-05 13:56:19,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081302020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:19,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833031977] [2021-06-05 13:56:19,200 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 13:56:19,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:19,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:19,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:19,264 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 13:56:19,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833031977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:19,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:19,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:56:19,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077251119] [2021-06-05 13:56:19,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:56:19,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:19,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:56:19,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:56:19,265 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 13:56:19,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:19,349 INFO L93 Difference]: Finished difference Result 8667 states and 25108 transitions. [2021-06-05 13:56:19,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:56:19,350 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 13:56:19,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:19,360 INFO L225 Difference]: With dead ends: 8667 [2021-06-05 13:56:19,360 INFO L226 Difference]: Without dead ends: 8667 [2021-06-05 13:56:19,360 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 66.4ms TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:56:19,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8667 states. [2021-06-05 13:56:19,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8667 to 8167. [2021-06-05 13:56:19,456 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 13:56:19,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8167 states to 8167 states and 24372 transitions. [2021-06-05 13:56:19,469 INFO L78 Accepts]: Start accepts. Automaton has 8167 states and 24372 transitions. Word has length 22 [2021-06-05 13:56:19,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:19,469 INFO L482 AbstractCegarLoop]: Abstraction has 8167 states and 24372 transitions. [2021-06-05 13:56:19,470 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 13:56:19,470 INFO L276 IsEmpty]: Start isEmpty. Operand 8167 states and 24372 transitions. [2021-06-05 13:56:19,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:19,477 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:19,477 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:19,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2942 [2021-06-05 13:56:19,677 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:19,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:19,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1840217855, now seen corresponding path program 230 times [2021-06-05 13:56:19,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:19,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388595748] [2021-06-05 13:56:19,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:19,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:19,738 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 13:56:19,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:19,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388595748] [2021-06-05 13:56:19,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388595748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:19,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732249816] [2021-06-05 13:56:19,739 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 13:56:19,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:56:19,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:19,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:19,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:19,803 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 13:56:19,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732249816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:19,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:19,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 13:56:19,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586149584] [2021-06-05 13:56:19,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:56:19,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:19,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:56:19,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:56:19,804 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 13:56:19,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:19,929 INFO L93 Difference]: Finished difference Result 9066 states and 26143 transitions. [2021-06-05 13:56:19,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:56:19,930 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 13:56:19,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:19,940 INFO L225 Difference]: With dead ends: 9066 [2021-06-05 13:56:19,940 INFO L226 Difference]: Without dead ends: 9066 [2021-06-05 13:56:19,940 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 97.9ms TimeCoverageRelationStatistics Valid=164, Invalid=298, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:56:19,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9066 states. [2021-06-05 13:56:20,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9066 to 8041. [2021-06-05 13:56:20,037 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 13:56:20,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8041 states to 8041 states and 23969 transitions. [2021-06-05 13:56:20,050 INFO L78 Accepts]: Start accepts. Automaton has 8041 states and 23969 transitions. Word has length 22 [2021-06-05 13:56:20,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:20,050 INFO L482 AbstractCegarLoop]: Abstraction has 8041 states and 23969 transitions. [2021-06-05 13:56:20,050 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 13:56:20,050 INFO L276 IsEmpty]: Start isEmpty. Operand 8041 states and 23969 transitions. [2021-06-05 13:56:20,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:20,058 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:20,058 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:20,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2943,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:20,258 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:20,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:20,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1948403175, now seen corresponding path program 231 times [2021-06-05 13:56:20,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:20,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933986064] [2021-06-05 13:56:20,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:20,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:20,325 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 13:56:20,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:20,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933986064] [2021-06-05 13:56:20,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933986064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:20,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876859080] [2021-06-05 13:56:20,325 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 13:56:20,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 13:56:20,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:20,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:20,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:20,393 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 13:56:20,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876859080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:20,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:20,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 13:56:20,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769261022] [2021-06-05 13:56:20,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:56:20,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:20,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:56:20,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:56:20,394 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 13:56:20,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:20,589 INFO L93 Difference]: Finished difference Result 12727 states and 37454 transitions. [2021-06-05 13:56:20,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:56:20,589 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 13:56:20,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:20,606 INFO L225 Difference]: With dead ends: 12727 [2021-06-05 13:56:20,606 INFO L226 Difference]: Without dead ends: 12727 [2021-06-05 13:56:20,607 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 147.8ms TimeCoverageRelationStatistics Valid=264, Invalid=492, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:56:20,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12727 states. [2021-06-05 13:56:20,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12727 to 11269. [2021-06-05 13:56:20,749 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 13:56:20,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11269 states to 11269 states and 34117 transitions. [2021-06-05 13:56:20,770 INFO L78 Accepts]: Start accepts. Automaton has 11269 states and 34117 transitions. Word has length 22 [2021-06-05 13:56:20,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:20,770 INFO L482 AbstractCegarLoop]: Abstraction has 11269 states and 34117 transitions. [2021-06-05 13:56:20,770 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 13:56:20,770 INFO L276 IsEmpty]: Start isEmpty. Operand 11269 states and 34117 transitions. [2021-06-05 13:56:20,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:20,779 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:20,779 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:20,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2944 [2021-06-05 13:56:20,980 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:20,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:20,980 INFO L82 PathProgramCache]: Analyzing trace with hash 2063972437, now seen corresponding path program 232 times [2021-06-05 13:56:20,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:20,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892834114] [2021-06-05 13:56:20,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:20,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:21,035 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 13:56:21,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:21,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892834114] [2021-06-05 13:56:21,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892834114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:21,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140359944] [2021-06-05 13:56:21,036 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 13:56:21,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:56:21,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:21,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:21,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:21,099 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 13:56:21,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140359944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:21,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:21,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:56:21,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222762021] [2021-06-05 13:56:21,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:56:21,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:21,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:56:21,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:56:21,100 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 13:56:21,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:21,189 INFO L93 Difference]: Finished difference Result 11783 states and 35094 transitions. [2021-06-05 13:56:21,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:56:21,190 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 13:56:21,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:21,203 INFO L225 Difference]: With dead ends: 11783 [2021-06-05 13:56:21,204 INFO L226 Difference]: Without dead ends: 11783 [2021-06-05 13:56:21,204 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 67.3ms TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:56:21,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11783 states. [2021-06-05 13:56:21,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11783 to 11255. [2021-06-05 13:56:21,370 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 13:56:21,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11255 states to 11255 states and 34070 transitions. [2021-06-05 13:56:21,390 INFO L78 Accepts]: Start accepts. Automaton has 11255 states and 34070 transitions. Word has length 22 [2021-06-05 13:56:21,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:21,390 INFO L482 AbstractCegarLoop]: Abstraction has 11255 states and 34070 transitions. [2021-06-05 13:56:21,390 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 13:56:21,390 INFO L276 IsEmpty]: Start isEmpty. Operand 11255 states and 34070 transitions. [2021-06-05 13:56:21,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:21,400 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:21,400 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:21,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2945,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:21,600 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:21,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:21,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1693139281, now seen corresponding path program 233 times [2021-06-05 13:56:21,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:21,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789143407] [2021-06-05 13:56:21,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:21,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:21,663 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 13:56:21,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:21,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789143407] [2021-06-05 13:56:21,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789143407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:21,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729862437] [2021-06-05 13:56:21,663 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 13:56:21,693 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:56:21,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:21,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:21,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:21,732 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 13:56:21,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729862437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:21,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:21,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 13:56:21,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469626157] [2021-06-05 13:56:21,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:56:21,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:21,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:56:21,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:56:21,733 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 13:56:21,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:21,883 INFO L93 Difference]: Finished difference Result 12824 states and 38032 transitions. [2021-06-05 13:56:21,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:56:21,883 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 13:56:21,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:21,903 INFO L225 Difference]: With dead ends: 12824 [2021-06-05 13:56:21,903 INFO L226 Difference]: Without dead ends: 12824 [2021-06-05 13:56:21,903 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 98.8ms TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:56:21,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12824 states. [2021-06-05 13:56:22,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12824 to 7201. [2021-06-05 13:56:22,043 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 13:56:22,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7201 states to 7201 states and 21318 transitions. [2021-06-05 13:56:22,056 INFO L78 Accepts]: Start accepts. Automaton has 7201 states and 21318 transitions. Word has length 22 [2021-06-05 13:56:22,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:22,056 INFO L482 AbstractCegarLoop]: Abstraction has 7201 states and 21318 transitions. [2021-06-05 13:56:22,056 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 13:56:22,056 INFO L276 IsEmpty]: Start isEmpty. Operand 7201 states and 21318 transitions. [2021-06-05 13:56:22,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:22,063 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:22,063 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:22,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2946 [2021-06-05 13:56:22,265 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:22,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:22,265 INFO L82 PathProgramCache]: Analyzing trace with hash 2095481749, now seen corresponding path program 234 times [2021-06-05 13:56:22,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:22,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164887725] [2021-06-05 13:56:22,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:22,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:22,330 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 13:56:22,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:22,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164887725] [2021-06-05 13:56:22,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164887725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:22,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185279321] [2021-06-05 13:56:22,330 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 13:56:22,356 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:56:22,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:22,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:22,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:22,396 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 13:56:22,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185279321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:22,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:22,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 13:56:22,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905067160] [2021-06-05 13:56:22,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:56:22,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:22,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:56:22,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:56:22,396 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 13:56:22,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:22,594 INFO L93 Difference]: Finished difference Result 10561 states and 30382 transitions. [2021-06-05 13:56:22,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:56:22,594 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 13:56:22,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:22,607 INFO L225 Difference]: With dead ends: 10561 [2021-06-05 13:56:22,607 INFO L226 Difference]: Without dead ends: 10561 [2021-06-05 13:56:22,607 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 146.1ms TimeCoverageRelationStatistics Valid=263, Invalid=493, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:56:22,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10561 states. [2021-06-05 13:56:22,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10561 to 6109. [2021-06-05 13:56:22,701 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 13:56:22,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6109 states to 6109 states and 18002 transitions. [2021-06-05 13:56:22,711 INFO L78 Accepts]: Start accepts. Automaton has 6109 states and 18002 transitions. Word has length 22 [2021-06-05 13:56:22,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:22,711 INFO L482 AbstractCegarLoop]: Abstraction has 6109 states and 18002 transitions. [2021-06-05 13:56:22,711 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 13:56:22,711 INFO L276 IsEmpty]: Start isEmpty. Operand 6109 states and 18002 transitions. [2021-06-05 13:56:22,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:22,717 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:22,717 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:22,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2947,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:22,918 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:22,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:22,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1959701393, now seen corresponding path program 235 times [2021-06-05 13:56:22,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:22,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48681313] [2021-06-05 13:56:22,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:22,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:22,965 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 13:56:22,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:22,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48681313] [2021-06-05 13:56:22,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48681313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:22,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658476926] [2021-06-05 13:56:22,965 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 13:56:22,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:22,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:22,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:23,030 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 13:56:23,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658476926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:23,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:23,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 13:56:23,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321676196] [2021-06-05 13:56:23,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:56:23,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:23,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:56:23,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:56:23,031 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 13:56:23,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:23,195 INFO L93 Difference]: Finished difference Result 6375 states and 18328 transitions. [2021-06-05 13:56:23,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:56:23,195 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 13:56:23,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:23,202 INFO L225 Difference]: With dead ends: 6375 [2021-06-05 13:56:23,202 INFO L226 Difference]: Without dead ends: 6371 [2021-06-05 13:56:23,202 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 99.4ms TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:56:23,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6371 states. [2021-06-05 13:56:23,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6371 to 6109. [2021-06-05 13:56:23,264 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 13:56:23,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6109 states to 6109 states and 17998 transitions. [2021-06-05 13:56:23,274 INFO L78 Accepts]: Start accepts. Automaton has 6109 states and 17998 transitions. Word has length 22 [2021-06-05 13:56:23,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:23,274 INFO L482 AbstractCegarLoop]: Abstraction has 6109 states and 17998 transitions. [2021-06-05 13:56:23,274 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 13:56:23,274 INFO L276 IsEmpty]: Start isEmpty. Operand 6109 states and 17998 transitions. [2021-06-05 13:56:23,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:23,279 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:23,279 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:23,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2948,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:23,479 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:23,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:23,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1459014895, now seen corresponding path program 236 times [2021-06-05 13:56:23,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:23,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309693203] [2021-06-05 13:56:23,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:23,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:23,542 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 13:56:23,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:23,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309693203] [2021-06-05 13:56:23,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309693203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:23,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777513059] [2021-06-05 13:56:23,543 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 13:56:23,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:56:23,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:23,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:23,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:23,613 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 13:56:23,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777513059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:23,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:23,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 13:56:23,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307929635] [2021-06-05 13:56:23,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:56:23,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:23,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:56:23,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:56:23,614 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 13:56:23,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:23,784 INFO L93 Difference]: Finished difference Result 7567 states and 21448 transitions. [2021-06-05 13:56:23,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:56:23,784 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 13:56:23,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:23,792 INFO L225 Difference]: With dead ends: 7567 [2021-06-05 13:56:23,792 INFO L226 Difference]: Without dead ends: 7567 [2021-06-05 13:56:23,793 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 142.8ms TimeCoverageRelationStatistics Valid=266, Invalid=490, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:56:23,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7567 states. [2021-06-05 13:56:23,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7567 to 4949. [2021-06-05 13:56:23,859 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 13:56:23,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4949 states to 4949 states and 14485 transitions. [2021-06-05 13:56:23,866 INFO L78 Accepts]: Start accepts. Automaton has 4949 states and 14485 transitions. Word has length 22 [2021-06-05 13:56:23,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:23,866 INFO L482 AbstractCegarLoop]: Abstraction has 4949 states and 14485 transitions. [2021-06-05 13:56:23,866 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 13:56:23,866 INFO L276 IsEmpty]: Start isEmpty. Operand 4949 states and 14485 transitions. [2021-06-05 13:56:23,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:23,871 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:23,871 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:24,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2949,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:24,071 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:24,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:24,072 INFO L82 PathProgramCache]: Analyzing trace with hash -2062760815, now seen corresponding path program 237 times [2021-06-05 13:56:24,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:24,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122565436] [2021-06-05 13:56:24,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:24,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:24,121 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 13:56:24,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:24,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122565436] [2021-06-05 13:56:24,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122565436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:24,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59568580] [2021-06-05 13:56:24,121 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 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 13:56:24,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:56:24,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:24,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:24,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:24,185 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 13:56:24,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59568580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:24,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:24,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:56:24,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208700616] [2021-06-05 13:56:24,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:56:24,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:24,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:56:24,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:56:24,187 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 13:56:24,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:24,327 INFO L93 Difference]: Finished difference Result 5274 states and 14931 transitions. [2021-06-05 13:56:24,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:56:24,327 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 13:56:24,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:24,333 INFO L225 Difference]: With dead ends: 5274 [2021-06-05 13:56:24,333 INFO L226 Difference]: Without dead ends: 5270 [2021-06-05 13:56:24,334 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 95.9ms TimeCoverageRelationStatistics Valid=171, Invalid=291, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:56:24,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5270 states. [2021-06-05 13:56:24,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5270 to 4961. [2021-06-05 13:56:24,393 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 13:56:24,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4961 states to 4961 states and 14514 transitions. [2021-06-05 13:56:24,402 INFO L78 Accepts]: Start accepts. Automaton has 4961 states and 14514 transitions. Word has length 22 [2021-06-05 13:56:24,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:24,402 INFO L482 AbstractCegarLoop]: Abstraction has 4961 states and 14514 transitions. [2021-06-05 13:56:24,402 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 13:56:24,402 INFO L276 IsEmpty]: Start isEmpty. Operand 4961 states and 14514 transitions. [2021-06-05 13:56:24,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:24,407 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:24,407 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:24,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2950 [2021-06-05 13:56:24,608 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:24,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:24,608 INFO L82 PathProgramCache]: Analyzing trace with hash -345011755, now seen corresponding path program 238 times [2021-06-05 13:56:24,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:24,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014035910] [2021-06-05 13:56:24,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:24,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:24,665 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 13:56:24,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:24,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014035910] [2021-06-05 13:56:24,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014035910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:24,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104198820] [2021-06-05 13:56:24,665 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 13:56:24,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:56:24,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:24,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:24,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:24,750 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 13:56:24,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104198820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:24,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:24,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:56:24,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001251290] [2021-06-05 13:56:24,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:56:24,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:24,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:56:24,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:56:24,751 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 13:56:24,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:24,855 INFO L93 Difference]: Finished difference Result 5690 states and 15948 transitions. [2021-06-05 13:56:24,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:56:24,855 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 13:56:24,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:24,863 INFO L225 Difference]: With dead ends: 5690 [2021-06-05 13:56:24,863 INFO L226 Difference]: Without dead ends: 5690 [2021-06-05 13:56:24,864 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 75.1ms TimeCoverageRelationStatistics Valid=111, Invalid=161, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:56:24,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5690 states. [2021-06-05 13:56:24,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5690 to 4969. [2021-06-05 13:56:24,944 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 13:56:24,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4969 states to 4969 states and 14533 transitions. [2021-06-05 13:56:24,955 INFO L78 Accepts]: Start accepts. Automaton has 4969 states and 14533 transitions. Word has length 22 [2021-06-05 13:56:24,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:24,955 INFO L482 AbstractCegarLoop]: Abstraction has 4969 states and 14533 transitions. [2021-06-05 13:56:24,955 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 13:56:24,955 INFO L276 IsEmpty]: Start isEmpty. Operand 4969 states and 14533 transitions. [2021-06-05 13:56:24,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:24,961 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:24,961 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:25,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2951 [2021-06-05 13:56:25,184 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:25,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:25,185 INFO L82 PathProgramCache]: Analyzing trace with hash -2074059089, now seen corresponding path program 239 times [2021-06-05 13:56:25,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:25,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709309201] [2021-06-05 13:56:25,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:25,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:25,234 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 13:56:25,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:25,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709309201] [2021-06-05 13:56:25,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709309201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:25,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568997390] [2021-06-05 13:56:25,234 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 13:56:25,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:56:25,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:25,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:25,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:25,303 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 13:56:25,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568997390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:25,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:25,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 13:56:25,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993734386] [2021-06-05 13:56:25,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:56:25,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:25,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:56:25,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:56:25,310 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 13:56:25,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:25,420 INFO L93 Difference]: Finished difference Result 5878 states and 16463 transitions. [2021-06-05 13:56:25,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:56:25,421 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 13:56:25,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:25,446 INFO L225 Difference]: With dead ends: 5878 [2021-06-05 13:56:25,446 INFO L226 Difference]: Without dead ends: 5878 [2021-06-05 13:56:25,447 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 86.7ms TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:56:25,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5878 states. [2021-06-05 13:56:25,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5878 to 4973. [2021-06-05 13:56:25,498 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 13:56:25,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4973 states to 4973 states and 14543 transitions. [2021-06-05 13:56:25,505 INFO L78 Accepts]: Start accepts. Automaton has 4973 states and 14543 transitions. Word has length 22 [2021-06-05 13:56:25,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:25,505 INFO L482 AbstractCegarLoop]: Abstraction has 4973 states and 14543 transitions. [2021-06-05 13:56:25,505 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 13:56:25,505 INFO L276 IsEmpty]: Start isEmpty. Operand 4973 states and 14543 transitions. [2021-06-05 13:56:25,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:25,509 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:25,509 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:25,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2952,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:25,710 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:25,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:25,710 INFO L82 PathProgramCache]: Analyzing trace with hash 160048405, now seen corresponding path program 240 times [2021-06-05 13:56:25,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:25,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643393704] [2021-06-05 13:56:25,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:25,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:25,765 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 13:56:25,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:25,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643393704] [2021-06-05 13:56:25,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643393704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:25,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067068831] [2021-06-05 13:56:25,766 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 13:56:25,792 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:56:25,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:25,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:25,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:25,843 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 13:56:25,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067068831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:25,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:25,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 13:56:25,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689894361] [2021-06-05 13:56:25,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:56:25,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:25,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:56:25,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:56:25,844 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 13:56:25,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:25,955 INFO L93 Difference]: Finished difference Result 5765 states and 16200 transitions. [2021-06-05 13:56:25,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:56:25,956 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 13:56:25,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:25,962 INFO L225 Difference]: With dead ends: 5765 [2021-06-05 13:56:25,962 INFO L226 Difference]: Without dead ends: 5765 [2021-06-05 13:56:25,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 89.6ms TimeCoverageRelationStatistics Valid=154, Invalid=266, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:56:25,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5765 states. [2021-06-05 13:56:26,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5765 to 4919. [2021-06-05 13:56:26,022 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 13:56:26,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4919 states to 4919 states and 14369 transitions. [2021-06-05 13:56:26,031 INFO L78 Accepts]: Start accepts. Automaton has 4919 states and 14369 transitions. Word has length 22 [2021-06-05 13:56:26,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:26,031 INFO L482 AbstractCegarLoop]: Abstraction has 4919 states and 14369 transitions. [2021-06-05 13:56:26,031 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 13:56:26,031 INFO L276 IsEmpty]: Start isEmpty. Operand 4919 states and 14369 transitions. [2021-06-05 13:56:26,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:26,036 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:26,036 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:26,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2953,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:26,237 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:26,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:26,237 INFO L82 PathProgramCache]: Analyzing trace with hash 697903983, now seen corresponding path program 241 times [2021-06-05 13:56:26,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:26,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29226622] [2021-06-05 13:56:26,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:26,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:26,294 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 13:56:26,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:26,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29226622] [2021-06-05 13:56:26,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29226622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:26,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497060519] [2021-06-05 13:56:26,294 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 13:56:26,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:26,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:26,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:26,363 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 13:56:26,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497060519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:26,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:26,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 13:56:26,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912951801] [2021-06-05 13:56:26,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:56:26,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:26,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:56:26,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:56:26,364 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 13:56:26,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:26,461 INFO L93 Difference]: Finished difference Result 8014 states and 23033 transitions. [2021-06-05 13:56:26,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:56:26,461 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 13:56:26,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:26,470 INFO L225 Difference]: With dead ends: 8014 [2021-06-05 13:56:26,470 INFO L226 Difference]: Without dead ends: 8014 [2021-06-05 13:56:26,470 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 81.0ms TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:56:26,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8014 states. [2021-06-05 13:56:26,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8014 to 7160. [2021-06-05 13:56:26,557 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 13:56:26,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7160 states to 7160 states and 21240 transitions. [2021-06-05 13:56:26,569 INFO L78 Accepts]: Start accepts. Automaton has 7160 states and 21240 transitions. Word has length 22 [2021-06-05 13:56:26,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:26,569 INFO L482 AbstractCegarLoop]: Abstraction has 7160 states and 21240 transitions. [2021-06-05 13:56:26,569 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 13:56:26,569 INFO L276 IsEmpty]: Start isEmpty. Operand 7160 states and 21240 transitions. [2021-06-05 13:56:26,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:26,575 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:26,575 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:26,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2954 [2021-06-05 13:56:26,776 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:26,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:26,776 INFO L82 PathProgramCache]: Analyzing trace with hash 191557717, now seen corresponding path program 242 times [2021-06-05 13:56:26,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:26,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403930494] [2021-06-05 13:56:26,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:26,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:26,842 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 13:56:26,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:26,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403930494] [2021-06-05 13:56:26,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403930494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:26,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095372043] [2021-06-05 13:56:26,842 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 13:56:26,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:56:26,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:26,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:26,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:26,910 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 13:56:26,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095372043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:26,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:26,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 13:56:26,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904768790] [2021-06-05 13:56:26,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:56:26,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:26,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:56:26,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:56:26,911 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 13:56:27,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:27,066 INFO L93 Difference]: Finished difference Result 8322 states and 23810 transitions. [2021-06-05 13:56:27,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:56:27,067 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 13:56:27,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:27,078 INFO L225 Difference]: With dead ends: 8322 [2021-06-05 13:56:27,078 INFO L226 Difference]: Without dead ends: 8322 [2021-06-05 13:56:27,079 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 123.3ms TimeCoverageRelationStatistics Valid=206, Invalid=394, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:56:27,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8322 states. [2021-06-05 13:56:27,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8322 to 7016. [2021-06-05 13:56:27,178 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 13:56:27,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7016 states to 7016 states and 20794 transitions. [2021-06-05 13:56:27,190 INFO L78 Accepts]: Start accepts. Automaton has 7016 states and 20794 transitions. Word has length 22 [2021-06-05 13:56:27,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:27,190 INFO L482 AbstractCegarLoop]: Abstraction has 7016 states and 20794 transitions. [2021-06-05 13:56:27,190 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 13:56:27,191 INFO L276 IsEmpty]: Start isEmpty. Operand 7016 states and 20794 transitions. [2021-06-05 13:56:27,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:27,198 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:27,198 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:27,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2955,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:27,399 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:27,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:27,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1674692655, now seen corresponding path program 243 times [2021-06-05 13:56:27,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:27,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976002731] [2021-06-05 13:56:27,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:27,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:27,467 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 13:56:27,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:27,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976002731] [2021-06-05 13:56:27,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976002731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:27,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584542727] [2021-06-05 13:56:27,468 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 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 13:56:27,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:56:27,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:27,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:27,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:27,540 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 13:56:27,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584542727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:27,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:27,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 13:56:27,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960296171] [2021-06-05 13:56:27,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:56:27,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:27,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:56:27,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:56:27,541 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 13:56:27,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:27,772 INFO L93 Difference]: Finished difference Result 10804 states and 31397 transitions. [2021-06-05 13:56:27,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 13:56:27,773 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 13:56:27,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:27,786 INFO L225 Difference]: With dead ends: 10804 [2021-06-05 13:56:27,786 INFO L226 Difference]: Without dead ends: 10804 [2021-06-05 13:56:27,787 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 191.0ms TimeCoverageRelationStatistics Valid=363, Invalid=693, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 13:56:27,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10804 states. [2021-06-05 13:56:27,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10804 to 8931. [2021-06-05 13:56:27,901 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 13:56:27,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8931 states to 8931 states and 26874 transitions. [2021-06-05 13:56:27,917 INFO L78 Accepts]: Start accepts. Automaton has 8931 states and 26874 transitions. Word has length 22 [2021-06-05 13:56:27,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:27,917 INFO L482 AbstractCegarLoop]: Abstraction has 8931 states and 26874 transitions. [2021-06-05 13:56:27,917 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 13:56:27,917 INFO L276 IsEmpty]: Start isEmpty. Operand 8931 states and 26874 transitions. [2021-06-05 13:56:27,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:27,925 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:27,925 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:28,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2956 [2021-06-05 13:56:28,125 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:28,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:28,125 INFO L82 PathProgramCache]: Analyzing trace with hash 962372481, now seen corresponding path program 244 times [2021-06-05 13:56:28,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:28,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925713443] [2021-06-05 13:56:28,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:28,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:28,186 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 13:56:28,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:28,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925713443] [2021-06-05 13:56:28,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925713443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:28,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000872762] [2021-06-05 13:56:28,186 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 13:56:28,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:56:28,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:28,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:28,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:28,248 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 13:56:28,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000872762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:28,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:28,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 13:56:28,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902527081] [2021-06-05 13:56:28,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:56:28,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:28,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:56:28,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:56:28,249 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 13:56:28,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:28,343 INFO L93 Difference]: Finished difference Result 9250 states and 27288 transitions. [2021-06-05 13:56:28,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:56:28,344 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 22 [2021-06-05 13:56:28,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:28,356 INFO L225 Difference]: With dead ends: 9250 [2021-06-05 13:56:28,356 INFO L226 Difference]: Without dead ends: 9249 [2021-06-05 13:56:28,356 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 78.1ms TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:56:28,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9249 states. [2021-06-05 13:56:28,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9249 to 8667. [2021-06-05 13:56:28,468 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 13:56:28,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8667 states to 8667 states and 26009 transitions. [2021-06-05 13:56:28,484 INFO L78 Accepts]: Start accepts. Automaton has 8667 states and 26009 transitions. Word has length 22 [2021-06-05 13:56:28,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:28,484 INFO L482 AbstractCegarLoop]: Abstraction has 8667 states and 26009 transitions. [2021-06-05 13:56:28,484 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 13:56:28,484 INFO L276 IsEmpty]: Start isEmpty. Operand 8667 states and 26009 transitions. [2021-06-05 13:56:28,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:28,493 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:28,493 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:28,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2957,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:28,693 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:28,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:28,694 INFO L82 PathProgramCache]: Analyzing trace with hash 456026215, now seen corresponding path program 245 times [2021-06-05 13:56:28,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:28,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934221435] [2021-06-05 13:56:28,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:28,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:28,760 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 13:56:28,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:28,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934221435] [2021-06-05 13:56:28,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934221435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:28,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737559759] [2021-06-05 13:56:28,761 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 13:56:28,786 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:56:28,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:28,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:28,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:28,824 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 13:56:28,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737559759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:28,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:28,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 13:56:28,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970045199] [2021-06-05 13:56:28,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:56:28,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:28,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:56:28,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:56:28,825 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 13:56:28,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:28,973 INFO L93 Difference]: Finished difference Result 9868 states and 29015 transitions. [2021-06-05 13:56:28,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:56:28,973 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 13:56:28,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:28,986 INFO L225 Difference]: With dead ends: 9868 [2021-06-05 13:56:28,987 INFO L226 Difference]: Without dead ends: 9868 [2021-06-05 13:56:28,987 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 118.0ms TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:56:28,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9868 states. [2021-06-05 13:56:29,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9868 to 6055. [2021-06-05 13:56:29,086 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 13:56:29,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6055 states to 6055 states and 17798 transitions. [2021-06-05 13:56:29,097 INFO L78 Accepts]: Start accepts. Automaton has 6055 states and 17798 transitions. Word has length 22 [2021-06-05 13:56:29,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:29,097 INFO L482 AbstractCegarLoop]: Abstraction has 6055 states and 17798 transitions. [2021-06-05 13:56:29,097 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 13:56:29,097 INFO L276 IsEmpty]: Start isEmpty. Operand 6055 states and 17798 transitions. [2021-06-05 13:56:29,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:29,103 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:29,103 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:29,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2958,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:29,303 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:29,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:29,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1939161153, now seen corresponding path program 246 times [2021-06-05 13:56:29,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:29,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839958194] [2021-06-05 13:56:29,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:29,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:29,378 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 13:56:29,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:29,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839958194] [2021-06-05 13:56:29,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839958194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:29,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198021358] [2021-06-05 13:56:29,379 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 13:56:29,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:56:29,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:29,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:29,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:29,483 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 13:56:29,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198021358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:29,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:29,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 13:56:29,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092960356] [2021-06-05 13:56:29,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:56:29,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:29,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:56:29,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:56:29,484 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 13:56:29,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:29,724 INFO L93 Difference]: Finished difference Result 8378 states and 23833 transitions. [2021-06-05 13:56:29,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:56:29,724 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 13:56:29,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:29,734 INFO L225 Difference]: With dead ends: 8378 [2021-06-05 13:56:29,735 INFO L226 Difference]: Without dead ends: 8378 [2021-06-05 13:56:29,735 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 185.7ms TimeCoverageRelationStatistics Valid=362, Invalid=694, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 13:56:29,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8378 states. [2021-06-05 13:56:29,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8378 to 4616. [2021-06-05 13:56:29,808 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 13:56:29,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4616 states to 4616 states and 13555 transitions. [2021-06-05 13:56:29,815 INFO L78 Accepts]: Start accepts. Automaton has 4616 states and 13555 transitions. Word has length 22 [2021-06-05 13:56:29,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:29,815 INFO L482 AbstractCegarLoop]: Abstraction has 4616 states and 13555 transitions. [2021-06-05 13:56:29,815 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 13:56:29,815 INFO L276 IsEmpty]: Start isEmpty. Operand 4616 states and 13555 transitions. [2021-06-05 13:56:29,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:29,819 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:29,819 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:30,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2959,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:30,021 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:30,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:30,021 INFO L82 PathProgramCache]: Analyzing trace with hash -611442137, now seen corresponding path program 247 times [2021-06-05 13:56:30,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:30,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95786607] [2021-06-05 13:56:30,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:30,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:30,093 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 13:56:30,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:30,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95786607] [2021-06-05 13:56:30,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95786607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:30,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064286805] [2021-06-05 13:56:30,094 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 13:56:30,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:30,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:30,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:30,156 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 13:56:30,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064286805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:30,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:30,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 13:56:30,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104088997] [2021-06-05 13:56:30,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:56:30,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:30,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:56:30,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:56:30,157 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 13:56:30,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:30,364 INFO L93 Difference]: Finished difference Result 7421 states and 21200 transitions. [2021-06-05 13:56:30,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:56:30,365 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 13:56:30,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:30,373 INFO L225 Difference]: With dead ends: 7421 [2021-06-05 13:56:30,373 INFO L226 Difference]: Without dead ends: 7421 [2021-06-05 13:56:30,373 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 167.6ms TimeCoverageRelationStatistics Valid=319, Invalid=611, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:56:30,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7421 states. [2021-06-05 13:56:30,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7421 to 6529. [2021-06-05 13:56:30,450 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 13:56:30,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6529 states to 6529 states and 19286 transitions. [2021-06-05 13:56:30,460 INFO L78 Accepts]: Start accepts. Automaton has 6529 states and 19286 transitions. Word has length 22 [2021-06-05 13:56:30,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:30,460 INFO L482 AbstractCegarLoop]: Abstraction has 6529 states and 19286 transitions. [2021-06-05 13:56:30,460 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 13:56:30,460 INFO L276 IsEmpty]: Start isEmpty. Operand 6529 states and 19286 transitions. [2021-06-05 13:56:30,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:30,466 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:30,466 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:30,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2960 [2021-06-05 13:56:30,666 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:30,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:30,666 INFO L82 PathProgramCache]: Analyzing trace with hash -690395165, now seen corresponding path program 248 times [2021-06-05 13:56:30,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:30,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803539326] [2021-06-05 13:56:30,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:30,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:30,716 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 13:56:30,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:30,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803539326] [2021-06-05 13:56:30,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803539326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:30,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204880048] [2021-06-05 13:56:30,716 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 13:56:30,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:56:30,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:30,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:30,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:30,774 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 13:56:30,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204880048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:30,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:30,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:56:30,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570047066] [2021-06-05 13:56:30,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:56:30,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:30,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:56:30,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:56:30,775 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 13:56:30,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:30,916 INFO L93 Difference]: Finished difference Result 6802 states and 19658 transitions. [2021-06-05 13:56:30,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:56:30,916 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 13:56:30,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:30,924 INFO L225 Difference]: With dead ends: 6802 [2021-06-05 13:56:30,924 INFO L226 Difference]: Without dead ends: 6798 [2021-06-05 13:56:30,924 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 94.3ms TimeCoverageRelationStatistics Valid=170, Invalid=292, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:56:30,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6798 states. [2021-06-05 13:56:31,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6798 to 6498. [2021-06-05 13:56:31,006 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 13:56:31,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6498 states to 6498 states and 19170 transitions. [2021-06-05 13:56:31,017 INFO L78 Accepts]: Start accepts. Automaton has 6498 states and 19170 transitions. Word has length 22 [2021-06-05 13:56:31,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:31,018 INFO L482 AbstractCegarLoop]: Abstraction has 6498 states and 19170 transitions. [2021-06-05 13:56:31,018 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 13:56:31,018 INFO L276 IsEmpty]: Start isEmpty. Operand 6498 states and 19170 transitions. [2021-06-05 13:56:31,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:31,023 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:31,023 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:31,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2961 [2021-06-05 13:56:31,224 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:31,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:31,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1027353895, now seen corresponding path program 249 times [2021-06-05 13:56:31,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:31,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562999486] [2021-06-05 13:56:31,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:31,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:31,272 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 13:56:31,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:31,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562999486] [2021-06-05 13:56:31,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562999486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:31,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381507438] [2021-06-05 13:56:31,272 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 13:56:31,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:56:31,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:31,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:31,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:31,336 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 13:56:31,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381507438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:31,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:31,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:56:31,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837874780] [2021-06-05 13:56:31,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:56:31,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:31,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:56:31,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:56:31,337 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 13:56:31,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:31,442 INFO L93 Difference]: Finished difference Result 7322 states and 20998 transitions. [2021-06-05 13:56:31,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:56:31,442 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 13:56:31,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:31,451 INFO L225 Difference]: With dead ends: 7322 [2021-06-05 13:56:31,452 INFO L226 Difference]: Without dead ends: 7322 [2021-06-05 13:56:31,452 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 69.5ms TimeCoverageRelationStatistics Valid=122, Invalid=184, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:56:31,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7322 states. [2021-06-05 13:56:31,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7322 to 6505. [2021-06-05 13:56:31,545 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 13:56:31,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6505 states to 6505 states and 19187 transitions. [2021-06-05 13:56:31,556 INFO L78 Accepts]: Start accepts. Automaton has 6505 states and 19187 transitions. Word has length 22 [2021-06-05 13:56:31,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:31,556 INFO L482 AbstractCegarLoop]: Abstraction has 6505 states and 19187 transitions. [2021-06-05 13:56:31,556 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 13:56:31,556 INFO L276 IsEmpty]: Start isEmpty. Operand 6505 states and 19187 transitions. [2021-06-05 13:56:31,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:31,562 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:31,562 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:31,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2962 [2021-06-05 13:56:31,763 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:31,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:31,763 INFO L82 PathProgramCache]: Analyzing trace with hash -701693439, now seen corresponding path program 250 times [2021-06-05 13:56:31,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:31,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575290617] [2021-06-05 13:56:31,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:31,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:31,815 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 13:56:31,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:31,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575290617] [2021-06-05 13:56:31,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575290617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:31,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33135754] [2021-06-05 13:56:31,815 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 13:56:31,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:56:31,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:31,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:31,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:31,877 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 13:56:31,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33135754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:31,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:31,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:56:31,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945493507] [2021-06-05 13:56:31,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:56:31,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:31,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:56:31,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:56:31,878 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 13:56:32,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:32,000 INFO L93 Difference]: Finished difference Result 7657 states and 21924 transitions. [2021-06-05 13:56:32,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:56:32,001 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 13:56:32,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:32,009 INFO L225 Difference]: With dead ends: 7657 [2021-06-05 13:56:32,009 INFO L226 Difference]: Without dead ends: 7657 [2021-06-05 13:56:32,009 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 92.8ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:56:32,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7657 states. [2021-06-05 13:56:32,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7657 to 6280. [2021-06-05 13:56:32,090 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 13:56:32,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6280 states to 6280 states and 18472 transitions. [2021-06-05 13:56:32,100 INFO L78 Accepts]: Start accepts. Automaton has 6280 states and 18472 transitions. Word has length 22 [2021-06-05 13:56:32,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:32,100 INFO L482 AbstractCegarLoop]: Abstraction has 6280 states and 18472 transitions. [2021-06-05 13:56:32,100 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 13:56:32,100 INFO L276 IsEmpty]: Start isEmpty. Operand 6280 states and 18472 transitions. [2021-06-05 13:56:32,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:32,106 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:32,106 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:32,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2963 [2021-06-05 13:56:32,307 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:32,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:32,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1532414055, now seen corresponding path program 251 times [2021-06-05 13:56:32,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:32,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931529125] [2021-06-05 13:56:32,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:32,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:32,361 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 13:56:32,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:32,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931529125] [2021-06-05 13:56:32,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931529125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:32,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952057676] [2021-06-05 13:56:32,362 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 13:56:32,387 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:56:32,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:32,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:32,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:32,425 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 13:56:32,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952057676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:32,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:32,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:56:32,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235054261] [2021-06-05 13:56:32,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:56:32,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:32,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:56:32,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:56:32,426 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 13:56:32,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:32,557 INFO L93 Difference]: Finished difference Result 8774 states and 25325 transitions. [2021-06-05 13:56:32,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:56:32,558 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 13:56:32,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:32,569 INFO L225 Difference]: With dead ends: 8774 [2021-06-05 13:56:32,569 INFO L226 Difference]: Without dead ends: 8774 [2021-06-05 13:56:32,570 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 104.5ms TimeCoverageRelationStatistics Valid=183, Invalid=323, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:56:32,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8774 states. [2021-06-05 13:56:32,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8774 to 7854. [2021-06-05 13:56:32,673 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 13:56:32,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7854 states to 7854 states and 23440 transitions. [2021-06-05 13:56:32,687 INFO L78 Accepts]: Start accepts. Automaton has 7854 states and 23440 transitions. Word has length 22 [2021-06-05 13:56:32,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:32,687 INFO L482 AbstractCegarLoop]: Abstraction has 7854 states and 23440 transitions. [2021-06-05 13:56:32,687 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 13:56:32,687 INFO L276 IsEmpty]: Start isEmpty. Operand 7854 states and 23440 transitions. [2021-06-05 13:56:32,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:32,695 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:32,695 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:32,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2964 [2021-06-05 13:56:32,898 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:32,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:32,906 INFO L82 PathProgramCache]: Analyzing trace with hash 2070269633, now seen corresponding path program 252 times [2021-06-05 13:56:32,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:32,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873471574] [2021-06-05 13:56:32,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:32,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:32,981 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 13:56:32,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:32,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873471574] [2021-06-05 13:56:32,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873471574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:32,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708778615] [2021-06-05 13:56:32,982 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 13:56:33,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:56:33,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:33,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:33,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:33,048 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 13:56:33,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708778615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:33,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:33,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 13:56:33,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384069733] [2021-06-05 13:56:33,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:56:33,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:33,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:56:33,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:56:33,049 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 13:56:33,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:33,177 INFO L93 Difference]: Finished difference Result 8525 states and 24660 transitions. [2021-06-05 13:56:33,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:56:33,178 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 13:56:33,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:33,190 INFO L225 Difference]: With dead ends: 8525 [2021-06-05 13:56:33,190 INFO L226 Difference]: Without dead ends: 8525 [2021-06-05 13:56:33,190 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 115.3ms TimeCoverageRelationStatistics Valid=176, Invalid=330, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:56:33,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8525 states. [2021-06-05 13:56:33,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8525 to 7170. [2021-06-05 13:56:33,325 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 13:56:33,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7170 states to 7170 states and 21341 transitions. [2021-06-05 13:56:33,339 INFO L78 Accepts]: Start accepts. Automaton has 7170 states and 21341 transitions. Word has length 22 [2021-06-05 13:56:33,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:33,339 INFO L482 AbstractCegarLoop]: Abstraction has 7170 states and 21341 transitions. [2021-06-05 13:56:33,339 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 13:56:33,339 INFO L276 IsEmpty]: Start isEmpty. Operand 7170 states and 21341 transitions. [2021-06-05 13:56:33,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:33,346 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:33,346 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:33,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2965,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:33,548 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:33,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:33,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1563923367, now seen corresponding path program 253 times [2021-06-05 13:56:33,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:33,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54779796] [2021-06-05 13:56:33,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:33,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:33,614 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 13:56:33,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:33,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54779796] [2021-06-05 13:56:33,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54779796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:33,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901634034] [2021-06-05 13:56:33,614 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 13:56:33,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:33,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:33,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:33,677 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 13:56:33,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901634034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:33,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:33,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 13:56:33,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838440133] [2021-06-05 13:56:33,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:56:33,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:33,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:56:33,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:56:33,678 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 13:56:33,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:33,790 INFO L93 Difference]: Finished difference Result 10318 states and 30338 transitions. [2021-06-05 13:56:33,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:56:33,790 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 13:56:33,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:33,803 INFO L225 Difference]: With dead ends: 10318 [2021-06-05 13:56:33,804 INFO L226 Difference]: Without dead ends: 10318 [2021-06-05 13:56:33,804 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 92.8ms TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:56:33,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10318 states. [2021-06-05 13:56:33,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10318 to 9947. [2021-06-05 13:56:33,918 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 13:56:33,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9947 states to 9947 states and 29793 transitions. [2021-06-05 13:56:33,935 INFO L78 Accepts]: Start accepts. Automaton has 9947 states and 29793 transitions. Word has length 22 [2021-06-05 13:56:33,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:33,936 INFO L482 AbstractCegarLoop]: Abstraction has 9947 states and 29793 transitions. [2021-06-05 13:56:33,936 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 13:56:33,936 INFO L276 IsEmpty]: Start isEmpty. Operand 9947 states and 29793 transitions. [2021-06-05 13:56:33,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:33,944 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:33,944 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:34,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2966,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:34,145 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:34,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:34,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1247908991, now seen corresponding path program 254 times [2021-06-05 13:56:34,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:34,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232499524] [2021-06-05 13:56:34,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:34,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:34,220 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 13:56:34,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:34,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232499524] [2021-06-05 13:56:34,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232499524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:34,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641059926] [2021-06-05 13:56:34,220 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 13:56:34,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:56:34,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:34,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:34,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:34,292 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 13:56:34,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641059926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:34,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:34,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 13:56:34,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943994425] [2021-06-05 13:56:34,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:56:34,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:34,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:56:34,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:56:34,293 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 13:56:34,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:34,478 INFO L93 Difference]: Finished difference Result 10463 states and 30703 transitions. [2021-06-05 13:56:34,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:56:34,478 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 13:56:34,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:34,491 INFO L225 Difference]: With dead ends: 10463 [2021-06-05 13:56:34,492 INFO L226 Difference]: Without dead ends: 10463 [2021-06-05 13:56:34,492 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 148.6ms TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:56:34,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10463 states. [2021-06-05 13:56:34,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10463 to 9768. [2021-06-05 13:56:34,615 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 13:56:34,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9768 states to 9768 states and 29256 transitions. [2021-06-05 13:56:34,633 INFO L78 Accepts]: Start accepts. Automaton has 9768 states and 29256 transitions. Word has length 22 [2021-06-05 13:56:34,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:34,633 INFO L482 AbstractCegarLoop]: Abstraction has 9768 states and 29256 transitions. [2021-06-05 13:56:34,633 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 13:56:34,633 INFO L276 IsEmpty]: Start isEmpty. Operand 9768 states and 29256 transitions. [2021-06-05 13:56:34,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:34,642 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:34,642 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:34,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2967,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:34,842 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:34,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:34,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1779601127, now seen corresponding path program 255 times [2021-06-05 13:56:34,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:34,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536911905] [2021-06-05 13:56:34,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:34,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:34,919 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 13:56:34,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:34,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536911905] [2021-06-05 13:56:34,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536911905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:34,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555321388] [2021-06-05 13:56:34,920 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 13:56:34,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:56:34,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:34,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:34,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:34,995 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 13:56:34,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555321388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:34,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:34,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 13:56:34,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303744198] [2021-06-05 13:56:34,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:56:34,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:34,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:56:34,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:56:34,996 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 13:56:35,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:35,274 INFO L93 Difference]: Finished difference Result 11837 states and 34803 transitions. [2021-06-05 13:56:35,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 13:56:35,274 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 13:56:35,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:35,289 INFO L225 Difference]: With dead ends: 11837 [2021-06-05 13:56:35,289 INFO L226 Difference]: Without dead ends: 11837 [2021-06-05 13:56:35,289 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 227.5ms TimeCoverageRelationStatistics Valid=448, Invalid=884, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 13:56:35,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11837 states. [2021-06-05 13:56:35,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11837 to 11079. [2021-06-05 13:56:35,437 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 13:56:35,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11079 states to 11079 states and 33221 transitions. [2021-06-05 13:56:35,460 INFO L78 Accepts]: Start accepts. Automaton has 11079 states and 33221 transitions. Word has length 22 [2021-06-05 13:56:35,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:35,460 INFO L482 AbstractCegarLoop]: Abstraction has 11079 states and 33221 transitions. [2021-06-05 13:56:35,460 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 13:56:35,460 INFO L276 IsEmpty]: Start isEmpty. Operand 11079 states and 33221 transitions. [2021-06-05 13:56:35,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:35,470 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:35,470 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:35,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2968 [2021-06-05 13:56:35,675 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:35,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:35,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1826781103, now seen corresponding path program 256 times [2021-06-05 13:56:35,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:35,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104775552] [2021-06-05 13:56:35,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:35,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:35,740 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 13:56:35,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:35,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104775552] [2021-06-05 13:56:35,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104775552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:35,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264854523] [2021-06-05 13:56:35,741 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 13:56:35,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:56:35,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:35,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:35,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:35,814 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 13:56:35,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264854523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:35,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:35,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 13:56:35,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554767494] [2021-06-05 13:56:35,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:56:35,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:35,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:56:35,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:56:35,815 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 13:56:36,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:36,050 INFO L93 Difference]: Finished difference Result 11467 states and 33833 transitions. [2021-06-05 13:56:36,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 13:56:36,050 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 13:56:36,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:36,063 INFO L225 Difference]: With dead ends: 11467 [2021-06-05 13:56:36,063 INFO L226 Difference]: Without dead ends: 11459 [2021-06-05 13:56:36,063 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 157.8ms TimeCoverageRelationStatistics Valid=273, Invalid=539, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:56:36,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11459 states. [2021-06-05 13:56:36,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11459 to 11123. [2021-06-05 13:56:36,201 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 13:56:36,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11123 states to 11123 states and 33361 transitions. [2021-06-05 13:56:36,222 INFO L78 Accepts]: Start accepts. Automaton has 11123 states and 33361 transitions. Word has length 22 [2021-06-05 13:56:36,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:36,222 INFO L482 AbstractCegarLoop]: Abstraction has 11123 states and 33361 transitions. [2021-06-05 13:56:36,222 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 13:56:36,222 INFO L276 IsEmpty]: Start isEmpty. Operand 11123 states and 33361 transitions. [2021-06-05 13:56:36,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:36,233 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:36,233 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:36,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2969,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:36,437 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:36,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:36,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1995549679, now seen corresponding path program 257 times [2021-06-05 13:56:36,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:36,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299300249] [2021-06-05 13:56:36,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:36,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:36,510 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 13:56:36,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:36,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299300249] [2021-06-05 13:56:36,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299300249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:36,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568592565] [2021-06-05 13:56:36,511 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 13:56:36,535 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:56:36,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:36,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:36,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:36,574 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 13:56:36,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568592565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:36,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:36,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 13:56:36,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974628720] [2021-06-05 13:56:36,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:56:36,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:36,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:56:36,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:56:36,574 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 13:56:36,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:36,796 INFO L93 Difference]: Finished difference Result 14272 states and 42332 transitions. [2021-06-05 13:56:36,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:56:36,797 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 13:56:36,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:36,817 INFO L225 Difference]: With dead ends: 14272 [2021-06-05 13:56:36,817 INFO L226 Difference]: Without dead ends: 14272 [2021-06-05 13:56:36,817 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 169.6ms TimeCoverageRelationStatistics Valid=318, Invalid=612, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:56:36,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14272 states. [2021-06-05 13:56:37,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14272 to 8542. [2021-06-05 13:56:37,023 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 13:56:37,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8542 states to 8542 states and 25435 transitions. [2021-06-05 13:56:37,046 INFO L78 Accepts]: Start accepts. Automaton has 8542 states and 25435 transitions. Word has length 22 [2021-06-05 13:56:37,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:37,046 INFO L482 AbstractCegarLoop]: Abstraction has 8542 states and 25435 transitions. [2021-06-05 13:56:37,047 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 13:56:37,047 INFO L276 IsEmpty]: Start isEmpty. Operand 8542 states and 25435 transitions. [2021-06-05 13:56:37,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:37,057 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:37,057 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:37,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2970 [2021-06-05 13:56:37,269 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:37,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:37,270 INFO L82 PathProgramCache]: Analyzing trace with hash -155561425, now seen corresponding path program 258 times [2021-06-05 13:56:37,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:37,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082313236] [2021-06-05 13:56:37,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:37,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:37,329 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 13:56:37,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:37,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082313236] [2021-06-05 13:56:37,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082313236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:37,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400026980] [2021-06-05 13:56:37,329 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 13:56:37,355 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:56:37,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:37,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:37,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:37,395 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 13:56:37,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400026980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:37,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:37,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:56:37,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899242001] [2021-06-05 13:56:37,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:56:37,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:37,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:56:37,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:56:37,396 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 13:56:37,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:37,538 INFO L93 Difference]: Finished difference Result 9541 states and 27821 transitions. [2021-06-05 13:56:37,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:56:37,539 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 13:56:37,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:37,551 INFO L225 Difference]: With dead ends: 9541 [2021-06-05 13:56:37,551 INFO L226 Difference]: Without dead ends: 9541 [2021-06-05 13:56:37,551 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 107.5ms TimeCoverageRelationStatistics Valid=182, Invalid=324, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:56:37,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9541 states. [2021-06-05 13:56:37,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9541 to 8634. [2021-06-05 13:56:37,669 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 13:56:37,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8634 states to 8634 states and 25699 transitions. [2021-06-05 13:56:37,686 INFO L78 Accepts]: Start accepts. Automaton has 8634 states and 25699 transitions. Word has length 22 [2021-06-05 13:56:37,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:37,686 INFO L482 AbstractCegarLoop]: Abstraction has 8634 states and 25699 transitions. [2021-06-05 13:56:37,686 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 13:56:37,686 INFO L276 IsEmpty]: Start isEmpty. Operand 8634 states and 25699 transitions. [2021-06-05 13:56:37,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:37,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:37,695 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:37,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2971,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:37,895 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:37,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:37,895 INFO L82 PathProgramCache]: Analyzing trace with hash 382294153, now seen corresponding path program 259 times [2021-06-05 13:56:37,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:37,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031501980] [2021-06-05 13:56:37,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:37,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:37,960 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 13:56:37,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:37,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031501980] [2021-06-05 13:56:37,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031501980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:37,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779366517] [2021-06-05 13:56:37,960 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 13:56:37,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:37,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:37,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:38,023 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 13:56:38,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779366517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:38,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:38,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 13:56:38,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317854489] [2021-06-05 13:56:38,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:56:38,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:38,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:56:38,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:56:38,024 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 13:56:38,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:38,159 INFO L93 Difference]: Finished difference Result 9330 states and 27244 transitions. [2021-06-05 13:56:38,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:56:38,160 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 13:56:38,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:38,171 INFO L225 Difference]: With dead ends: 9330 [2021-06-05 13:56:38,171 INFO L226 Difference]: Without dead ends: 9330 [2021-06-05 13:56:38,171 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 108.0ms TimeCoverageRelationStatistics Valid=175, Invalid=331, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:56:38,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9330 states. [2021-06-05 13:56:38,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9330 to 6762. [2021-06-05 13:56:38,265 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 13:56:38,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6762 states to 6762 states and 20033 transitions. [2021-06-05 13:56:38,276 INFO L78 Accepts]: Start accepts. Automaton has 6762 states and 20033 transitions. Word has length 22 [2021-06-05 13:56:38,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:38,276 INFO L482 AbstractCegarLoop]: Abstraction has 6762 states and 20033 transitions. [2021-06-05 13:56:38,276 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 13:56:38,277 INFO L276 IsEmpty]: Start isEmpty. Operand 6762 states and 20033 transitions. [2021-06-05 13:56:38,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:38,282 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:38,282 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:38,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2972 [2021-06-05 13:56:38,483 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:38,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:38,483 INFO L82 PathProgramCache]: Analyzing trace with hash -124052113, now seen corresponding path program 260 times [2021-06-05 13:56:38,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:38,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599721289] [2021-06-05 13:56:38,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:38,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:38,549 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 13:56:38,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:38,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599721289] [2021-06-05 13:56:38,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599721289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:38,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785455759] [2021-06-05 13:56:38,550 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 13:56:38,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:56:38,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:38,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:38,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:38,613 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 13:56:38,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785455759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:38,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:38,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 13:56:38,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575399689] [2021-06-05 13:56:38,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:56:38,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:38,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:56:38,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:56:38,614 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 13:56:38,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:38,726 INFO L93 Difference]: Finished difference Result 8299 states and 24037 transitions. [2021-06-05 13:56:38,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:56:38,727 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 13:56:38,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:38,738 INFO L225 Difference]: With dead ends: 8299 [2021-06-05 13:56:38,738 INFO L226 Difference]: Without dead ends: 8299 [2021-06-05 13:56:38,738 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 98.3ms TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:56:38,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8299 states. [2021-06-05 13:56:38,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8299 to 7676. [2021-06-05 13:56:38,834 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 13:56:38,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7676 states to 7676 states and 22721 transitions. [2021-06-05 13:56:38,846 INFO L78 Accepts]: Start accepts. Automaton has 7676 states and 22721 transitions. Word has length 22 [2021-06-05 13:56:38,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:38,846 INFO L482 AbstractCegarLoop]: Abstraction has 7676 states and 22721 transitions. [2021-06-05 13:56:38,846 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 13:56:38,846 INFO L276 IsEmpty]: Start isEmpty. Operand 7676 states and 22721 transitions. [2021-06-05 13:56:38,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:38,853 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:38,853 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:39,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2973,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:39,053 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:39,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:39,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1359082825, now seen corresponding path program 261 times [2021-06-05 13:56:39,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:39,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996603793] [2021-06-05 13:56:39,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:39,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:39,127 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 13:56:39,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:39,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996603793] [2021-06-05 13:56:39,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996603793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:39,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465078030] [2021-06-05 13:56:39,128 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 13:56:39,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:56:39,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:39,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:39,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:39,192 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 13:56:39,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465078030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:39,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:39,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 13:56:39,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501424497] [2021-06-05 13:56:39,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:56:39,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:39,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:56:39,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:56:39,194 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 13:56:39,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:39,369 INFO L93 Difference]: Finished difference Result 8482 states and 24462 transitions. [2021-06-05 13:56:39,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:56:39,370 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 13:56:39,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:39,380 INFO L225 Difference]: With dead ends: 8482 [2021-06-05 13:56:39,380 INFO L226 Difference]: Without dead ends: 8482 [2021-06-05 13:56:39,380 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 146.9ms TimeCoverageRelationStatistics Valid=249, Invalid=507, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:56:39,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8482 states. [2021-06-05 13:56:39,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8482 to 7047. [2021-06-05 13:56:39,472 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 13:56:39,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7047 states to 7047 states and 20815 transitions. [2021-06-05 13:56:39,485 INFO L78 Accepts]: Start accepts. Automaton has 7047 states and 20815 transitions. Word has length 22 [2021-06-05 13:56:39,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:39,485 INFO L482 AbstractCegarLoop]: Abstraction has 7047 states and 20815 transitions. [2021-06-05 13:56:39,485 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 13:56:39,485 INFO L276 IsEmpty]: Start isEmpty. Operand 7047 states and 20815 transitions. [2021-06-05 13:56:39,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:39,491 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:39,491 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:39,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2974 [2021-06-05 13:56:39,692 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:39,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:39,692 INFO L82 PathProgramCache]: Analyzing trace with hash 91625647, now seen corresponding path program 262 times [2021-06-05 13:56:39,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:39,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977597449] [2021-06-05 13:56:39,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:39,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:39,786 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 13:56:39,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:39,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977597449] [2021-06-05 13:56:39,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977597449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:39,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615386260] [2021-06-05 13:56:39,786 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 13:56:39,819 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:56:39,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:39,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:39,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:39,866 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 13:56:39,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615386260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:39,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:39,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 13:56:39,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409769189] [2021-06-05 13:56:39,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:56:39,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:39,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:56:39,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:56:39,867 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 13:56:40,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:40,137 INFO L93 Difference]: Finished difference Result 8517 states and 24388 transitions. [2021-06-05 13:56:40,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 13:56:40,138 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 13:56:40,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:40,147 INFO L225 Difference]: With dead ends: 8517 [2021-06-05 13:56:40,147 INFO L226 Difference]: Without dead ends: 8517 [2021-06-05 13:56:40,148 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 245.0ms TimeCoverageRelationStatistics Valid=447, Invalid=885, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 13:56:40,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8517 states. [2021-06-05 13:56:40,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8517 to 6822. [2021-06-05 13:56:40,233 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 13:56:40,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6822 states to 6822 states and 20262 transitions. [2021-06-05 13:56:40,245 INFO L78 Accepts]: Start accepts. Automaton has 6822 states and 20262 transitions. Word has length 22 [2021-06-05 13:56:40,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:40,245 INFO L482 AbstractCegarLoop]: Abstraction has 6822 states and 20262 transitions. [2021-06-05 13:56:40,245 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 13:56:40,245 INFO L276 IsEmpty]: Start isEmpty. Operand 6822 states and 20262 transitions. [2021-06-05 13:56:40,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:40,251 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:40,251 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:40,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2975 [2021-06-05 13:56:40,451 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:40,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:40,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1108198033, now seen corresponding path program 263 times [2021-06-05 13:56:40,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:40,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145962732] [2021-06-05 13:56:40,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:40,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:40,505 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 13:56:40,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:40,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145962732] [2021-06-05 13:56:40,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145962732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:40,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070676305] [2021-06-05 13:56:40,506 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 13:56:40,534 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:56:40,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:40,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:40,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:40,568 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 13:56:40,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070676305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:40,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:40,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:56:40,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724824342] [2021-06-05 13:56:40,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:56:40,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:40,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:56:40,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:56:40,569 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 13:56:40,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:40,747 INFO L93 Difference]: Finished difference Result 7102 states and 20626 transitions. [2021-06-05 13:56:40,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:56:40,747 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 13:56:40,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:40,755 INFO L225 Difference]: With dead ends: 7102 [2021-06-05 13:56:40,755 INFO L226 Difference]: Without dead ends: 7096 [2021-06-05 13:56:40,755 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 126.1ms TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:56:40,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7096 states. [2021-06-05 13:56:40,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7096 to 6624. [2021-06-05 13:56:40,840 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 13:56:40,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6624 states to 6624 states and 19597 transitions. [2021-06-05 13:56:40,851 INFO L78 Accepts]: Start accepts. Automaton has 6624 states and 19597 transitions. Word has length 22 [2021-06-05 13:56:40,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:40,851 INFO L482 AbstractCegarLoop]: Abstraction has 6624 states and 19597 transitions. [2021-06-05 13:56:40,851 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 13:56:40,851 INFO L276 IsEmpty]: Start isEmpty. Operand 6624 states and 19597 transitions. [2021-06-05 13:56:40,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:40,857 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:40,857 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:41,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2976,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:41,057 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:41,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:41,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1172512213, now seen corresponding path program 264 times [2021-06-05 13:56:41,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:41,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19235336] [2021-06-05 13:56:41,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:41,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:41,171 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 13:56:41,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:41,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19235336] [2021-06-05 13:56:41,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19235336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:41,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374584550] [2021-06-05 13:56:41,172 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 13:56:41,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:56:41,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:41,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:41,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:41,242 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 13:56:41,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374584550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:41,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:41,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 13:56:41,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495718092] [2021-06-05 13:56:41,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:56:41,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:41,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:56:41,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:56:41,243 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 13:56:41,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:41,344 INFO L93 Difference]: Finished difference Result 6797 states and 19752 transitions. [2021-06-05 13:56:41,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:56:41,345 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 13:56:41,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:41,352 INFO L225 Difference]: With dead ends: 6797 [2021-06-05 13:56:41,353 INFO L226 Difference]: Without dead ends: 6795 [2021-06-05 13:56:41,353 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 145.0ms TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:56:41,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6795 states. [2021-06-05 13:56:41,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6795 to 6384. [2021-06-05 13:56:41,427 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 13:56:41,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6384 states to 6384 states and 18851 transitions. [2021-06-05 13:56:41,438 INFO L78 Accepts]: Start accepts. Automaton has 6384 states and 18851 transitions. Word has length 22 [2021-06-05 13:56:41,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:41,438 INFO L482 AbstractCegarLoop]: Abstraction has 6384 states and 18851 transitions. [2021-06-05 13:56:41,438 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 13:56:41,438 INFO L276 IsEmpty]: Start isEmpty. Operand 6384 states and 18851 transitions. [2021-06-05 13:56:41,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:41,443 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:41,443 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:41,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2977 [2021-06-05 13:56:41,644 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:41,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:41,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1639320145, now seen corresponding path program 265 times [2021-06-05 13:56:41,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:41,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341061711] [2021-06-05 13:56:41,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:41,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:41,717 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 13:56:41,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:41,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341061711] [2021-06-05 13:56:41,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341061711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:41,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072439928] [2021-06-05 13:56:41,718 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 13:56:41,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:41,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:41,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:41,787 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 13:56:41,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072439928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:41,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:41,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 13:56:41,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128954921] [2021-06-05 13:56:41,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:56:41,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:41,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:56:41,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:56:41,788 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 13:56:41,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:41,947 INFO L93 Difference]: Finished difference Result 6844 states and 19836 transitions. [2021-06-05 13:56:41,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:56:41,947 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 13:56:41,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:41,954 INFO L225 Difference]: With dead ends: 6844 [2021-06-05 13:56:41,954 INFO L226 Difference]: Without dead ends: 6844 [2021-06-05 13:56:41,954 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 147.7ms TimeCoverageRelationStatistics Valid=252, Invalid=504, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:56:41,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6844 states. [2021-06-05 13:56:42,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6844 to 5821. [2021-06-05 13:56:42,016 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 13:56:42,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5821 states to 5821 states and 17134 transitions. [2021-06-05 13:56:42,025 INFO L78 Accepts]: Start accepts. Automaton has 5821 states and 17134 transitions. Word has length 22 [2021-06-05 13:56:42,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:42,025 INFO L482 AbstractCegarLoop]: Abstraction has 5821 states and 17134 transitions. [2021-06-05 13:56:42,025 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 13:56:42,025 INFO L276 IsEmpty]: Start isEmpty. Operand 5821 states and 17134 transitions. [2021-06-05 13:56:42,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:42,030 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:42,030 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:42,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2978,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:42,230 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:42,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:42,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1388189973, now seen corresponding path program 266 times [2021-06-05 13:56:42,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:42,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171598279] [2021-06-05 13:56:42,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:42,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:42,306 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 13:56:42,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:42,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171598279] [2021-06-05 13:56:42,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171598279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:42,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294411833] [2021-06-05 13:56:42,307 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 13:56:42,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:56:42,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:42,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:42,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:42,377 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 13:56:42,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294411833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:42,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:42,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 13:56:42,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204008087] [2021-06-05 13:56:42,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:56:42,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:42,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:56:42,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:56:42,378 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 13:56:42,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:42,640 INFO L93 Difference]: Finished difference Result 6844 states and 19503 transitions. [2021-06-05 13:56:42,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 13:56:42,640 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 13:56:42,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:42,647 INFO L225 Difference]: With dead ends: 6844 [2021-06-05 13:56:42,647 INFO L226 Difference]: Without dead ends: 6844 [2021-06-05 13:56:42,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 229.9ms TimeCoverageRelationStatistics Valid=478, Invalid=928, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 13:56:42,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6844 states. [2021-06-05 13:56:42,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6844 to 5659. [2021-06-05 13:56:42,705 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 13:56:42,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5659 states to 5659 states and 16734 transitions. [2021-06-05 13:56:42,714 INFO L78 Accepts]: Start accepts. Automaton has 5659 states and 16734 transitions. Word has length 22 [2021-06-05 13:56:42,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:42,714 INFO L482 AbstractCegarLoop]: Abstraction has 5659 states and 16734 transitions. [2021-06-05 13:56:42,714 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 13:56:42,714 INFO L276 IsEmpty]: Start isEmpty. Operand 5659 states and 16734 transitions. [2021-06-05 13:56:42,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:42,718 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:42,718 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:42,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2979 [2021-06-05 13:56:42,918 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:42,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:42,919 INFO L82 PathProgramCache]: Analyzing trace with hash -2101570705, now seen corresponding path program 267 times [2021-06-05 13:56:42,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:42,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033900697] [2021-06-05 13:56:42,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:42,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:42,967 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 13:56:42,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:42,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033900697] [2021-06-05 13:56:42,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033900697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:42,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116322937] [2021-06-05 13:56:42,968 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 13:56:42,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:56:42,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:42,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:42,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:43,026 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 13:56:43,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116322937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:43,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:43,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:56:43,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31579838] [2021-06-05 13:56:43,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:56:43,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:43,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:56:43,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:56:43,027 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 13:56:43,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:43,170 INFO L93 Difference]: Finished difference Result 5851 states and 16961 transitions. [2021-06-05 13:56:43,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:56:43,170 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 13:56:43,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:43,177 INFO L225 Difference]: With dead ends: 5851 [2021-06-05 13:56:43,177 INFO L226 Difference]: Without dead ends: 5847 [2021-06-05 13:56:43,178 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 99.7ms TimeCoverageRelationStatistics Valid=176, Invalid=330, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:56:43,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5847 states. [2021-06-05 13:56:43,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5847 to 5652. [2021-06-05 13:56:43,248 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 13:56:43,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5652 states to 5652 states and 16706 transitions. [2021-06-05 13:56:43,258 INFO L78 Accepts]: Start accepts. Automaton has 5652 states and 16706 transitions. Word has length 22 [2021-06-05 13:56:43,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:43,258 INFO L482 AbstractCegarLoop]: Abstraction has 5652 states and 16706 transitions. [2021-06-05 13:56:43,258 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 13:56:43,258 INFO L276 IsEmpty]: Start isEmpty. Operand 5652 states and 16706 transitions. [2021-06-05 13:56:43,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:43,263 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:43,263 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:43,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2980 [2021-06-05 13:56:43,464 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:43,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:43,464 INFO L82 PathProgramCache]: Analyzing trace with hash -371100689, now seen corresponding path program 268 times [2021-06-05 13:56:43,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:43,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991909696] [2021-06-05 13:56:43,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:43,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:43,551 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 13:56:43,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:43,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991909696] [2021-06-05 13:56:43,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991909696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:43,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737935546] [2021-06-05 13:56:43,551 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 13:56:43,576 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:56:43,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:43,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:43,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:43,621 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 13:56:43,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737935546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:43,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:43,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 13:56:43,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971616247] [2021-06-05 13:56:43,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:56:43,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:43,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:56:43,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:56:43,622 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 13:56:43,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:43,875 INFO L93 Difference]: Finished difference Result 7203 states and 20623 transitions. [2021-06-05 13:56:43,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:56:43,876 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 13:56:43,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:43,883 INFO L225 Difference]: With dead ends: 7203 [2021-06-05 13:56:43,884 INFO L226 Difference]: Without dead ends: 7203 [2021-06-05 13:56:43,884 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 211.9ms TimeCoverageRelationStatistics Valid=403, Invalid=787, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 13:56:43,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7203 states. [2021-06-05 13:56:43,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7203 to 6624. [2021-06-05 13:56:43,957 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 13:56:43,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6624 states to 6624 states and 19558 transitions. [2021-06-05 13:56:43,968 INFO L78 Accepts]: Start accepts. Automaton has 6624 states and 19558 transitions. Word has length 22 [2021-06-05 13:56:43,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:43,968 INFO L482 AbstractCegarLoop]: Abstraction has 6624 states and 19558 transitions. [2021-06-05 13:56:43,968 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 13:56:43,968 INFO L276 IsEmpty]: Start isEmpty. Operand 6624 states and 19558 transitions. [2021-06-05 13:56:43,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:43,973 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:43,973 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:44,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2981,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:44,173 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:44,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:44,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1096732975, now seen corresponding path program 269 times [2021-06-05 13:56:44,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:44,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764762739] [2021-06-05 13:56:44,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:44,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:44,235 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 13:56:44,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:44,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764762739] [2021-06-05 13:56:44,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764762739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:44,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678579457] [2021-06-05 13:56:44,235 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 13:56:44,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:56:44,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:44,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:44,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:44,312 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 13:56:44,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678579457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:44,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:44,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:56:44,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183977982] [2021-06-05 13:56:44,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:56:44,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:44,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:56:44,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:56:44,313 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 13:56:44,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:44,483 INFO L93 Difference]: Finished difference Result 6862 states and 19866 transitions. [2021-06-05 13:56:44,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:56:44,484 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 13:56:44,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:44,491 INFO L225 Difference]: With dead ends: 6862 [2021-06-05 13:56:44,491 INFO L226 Difference]: Without dead ends: 6858 [2021-06-05 13:56:44,491 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 103.5ms TimeCoverageRelationStatistics Valid=169, Invalid=293, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:56:44,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6858 states. [2021-06-05 13:56:44,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6858 to 6638. [2021-06-05 13:56:44,571 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 13:56:44,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6638 states to 6638 states and 19601 transitions. [2021-06-05 13:56:44,582 INFO L78 Accepts]: Start accepts. Automaton has 6638 states and 19601 transitions. Word has length 22 [2021-06-05 13:56:44,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:44,582 INFO L482 AbstractCegarLoop]: Abstraction has 6638 states and 19601 transitions. [2021-06-05 13:56:44,583 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 13:56:44,583 INFO L276 IsEmpty]: Start isEmpty. Operand 6638 states and 19601 transitions. [2021-06-05 13:56:44,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:44,588 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:44,588 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:44,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2982 [2021-06-05 13:56:44,789 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:44,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:44,789 INFO L82 PathProgramCache]: Analyzing trace with hash 621016085, now seen corresponding path program 270 times [2021-06-05 13:56:44,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:44,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880315136] [2021-06-05 13:56:44,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:44,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:44,838 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 13:56:44,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:44,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880315136] [2021-06-05 13:56:44,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880315136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:44,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526822944] [2021-06-05 13:56:44,838 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 13:56:44,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:56:44,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:44,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:44,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:44,901 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 13:56:44,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526822944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:44,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:44,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:56:44,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150741808] [2021-06-05 13:56:44,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:56:44,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:44,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:56:44,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:56:44,902 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 13:56:45,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:45,003 INFO L93 Difference]: Finished difference Result 7175 states and 20692 transitions. [2021-06-05 13:56:45,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:56:45,004 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 13:56:45,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:45,013 INFO L225 Difference]: With dead ends: 7175 [2021-06-05 13:56:45,013 INFO L226 Difference]: Without dead ends: 7175 [2021-06-05 13:56:45,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 75.4ms TimeCoverageRelationStatistics Valid=133, Invalid=209, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:56:45,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7175 states. [2021-06-05 13:56:45,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7175 to 6639. [2021-06-05 13:56:45,099 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 13:56:45,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6639 states to 6639 states and 19601 transitions. [2021-06-05 13:56:45,111 INFO L78 Accepts]: Start accepts. Automaton has 6639 states and 19601 transitions. Word has length 22 [2021-06-05 13:56:45,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:45,111 INFO L482 AbstractCegarLoop]: Abstraction has 6639 states and 19601 transitions. [2021-06-05 13:56:45,111 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 13:56:45,111 INFO L276 IsEmpty]: Start isEmpty. Operand 6639 states and 19601 transitions. [2021-06-05 13:56:45,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:45,157 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:45,157 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:45,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2983,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:45,358 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:45,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:45,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1108031249, now seen corresponding path program 271 times [2021-06-05 13:56:45,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:45,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065216531] [2021-06-05 13:56:45,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:45,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:45,409 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 13:56:45,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:45,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065216531] [2021-06-05 13:56:45,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065216531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:45,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768365580] [2021-06-05 13:56:45,409 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 13:56:45,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:45,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:45,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:45,476 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 13:56:45,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768365580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:45,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:45,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 13:56:45,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382912493] [2021-06-05 13:56:45,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:56:45,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:45,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:56:45,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:56:45,477 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 13:56:45,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:45,610 INFO L93 Difference]: Finished difference Result 7416 states and 21327 transitions. [2021-06-05 13:56:45,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:56:45,610 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 13:56:45,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:45,617 INFO L225 Difference]: With dead ends: 7416 [2021-06-05 13:56:45,618 INFO L226 Difference]: Without dead ends: 7416 [2021-06-05 13:56:45,618 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 107.5ms TimeCoverageRelationStatistics Valid=203, Invalid=349, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:56:45,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7416 states. [2021-06-05 13:56:45,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7416 to 6639. [2021-06-05 13:56:45,690 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 13:56:45,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6639 states to 6639 states and 19600 transitions. [2021-06-05 13:56:45,701 INFO L78 Accepts]: Start accepts. Automaton has 6639 states and 19600 transitions. Word has length 22 [2021-06-05 13:56:45,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:45,701 INFO L482 AbstractCegarLoop]: Abstraction has 6639 states and 19600 transitions. [2021-06-05 13:56:45,701 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 13:56:45,701 INFO L276 IsEmpty]: Start isEmpty. Operand 6639 states and 19600 transitions. [2021-06-05 13:56:45,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:45,706 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:45,706 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:45,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2984 [2021-06-05 13:56:45,907 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:45,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:45,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1126076245, now seen corresponding path program 272 times [2021-06-05 13:56:45,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:45,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401554608] [2021-06-05 13:56:45,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:45,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:45,963 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 13:56:45,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:45,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401554608] [2021-06-05 13:56:45,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401554608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:45,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445789871] [2021-06-05 13:56:45,964 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 13:56:45,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:56:45,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:45,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:45,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:46,032 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 13:56:46,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445789871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:46,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:46,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 13:56:46,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913098988] [2021-06-05 13:56:46,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:56:46,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:46,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:56:46,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:56:46,033 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 13:56:46,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:46,192 INFO L93 Difference]: Finished difference Result 7505 states and 21578 transitions. [2021-06-05 13:56:46,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:56:46,192 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 13:56:46,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:46,201 INFO L225 Difference]: With dead ends: 7505 [2021-06-05 13:56:46,201 INFO L226 Difference]: Without dead ends: 7505 [2021-06-05 13:56:46,202 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 129.3ms TimeCoverageRelationStatistics Valid=253, Invalid=449, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:56:46,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7505 states. [2021-06-05 13:56:46,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7505 to 6648. [2021-06-05 13:56:46,288 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 13:56:46,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6648 states to 6648 states and 19627 transitions. [2021-06-05 13:56:46,300 INFO L78 Accepts]: Start accepts. Automaton has 6648 states and 19627 transitions. Word has length 22 [2021-06-05 13:56:46,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:46,300 INFO L482 AbstractCegarLoop]: Abstraction has 6648 states and 19627 transitions. [2021-06-05 13:56:46,300 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 13:56:46,300 INFO L276 IsEmpty]: Start isEmpty. Operand 6648 states and 19627 transitions. [2021-06-05 13:56:46,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:46,305 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:46,306 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:46,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2985,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:46,506 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:46,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:46,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1663931823, now seen corresponding path program 273 times [2021-06-05 13:56:46,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:46,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862667455] [2021-06-05 13:56:46,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:46,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:46,574 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 13:56:46,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:46,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862667455] [2021-06-05 13:56:46,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862667455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:46,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166194147] [2021-06-05 13:56:46,574 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 13:56:46,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:56:46,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:46,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:46,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:46,643 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 13:56:46,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166194147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:46,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:46,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 13:56:46,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088197277] [2021-06-05 13:56:46,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:56:46,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:46,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:56:46,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:56:46,644 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 13:56:46,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:46,802 INFO L93 Difference]: Finished difference Result 8295 states and 23872 transitions. [2021-06-05 13:56:46,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 13:56:46,802 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 13:56:46,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:46,811 INFO L225 Difference]: With dead ends: 8295 [2021-06-05 13:56:46,812 INFO L226 Difference]: Without dead ends: 8295 [2021-06-05 13:56:46,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 137.3ms TimeCoverageRelationStatistics Valid=246, Invalid=456, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:56:46,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8295 states. [2021-06-05 13:56:46,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8295 to 7544. [2021-06-05 13:56:46,898 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 13:56:46,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7544 states to 7544 states and 22374 transitions. [2021-06-05 13:56:46,910 INFO L78 Accepts]: Start accepts. Automaton has 7544 states and 22374 transitions. Word has length 22 [2021-06-05 13:56:46,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:46,910 INFO L482 AbstractCegarLoop]: Abstraction has 7544 states and 22374 transitions. [2021-06-05 13:56:46,910 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 13:56:46,910 INFO L276 IsEmpty]: Start isEmpty. Operand 7544 states and 22374 transitions. [2021-06-05 13:56:46,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:46,917 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:46,917 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:47,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2986,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:47,117 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:47,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:47,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1157585557, now seen corresponding path program 274 times [2021-06-05 13:56:47,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:47,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822089304] [2021-06-05 13:56:47,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:47,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:47,185 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 13:56:47,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:47,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822089304] [2021-06-05 13:56:47,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822089304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:47,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077286395] [2021-06-05 13:56:47,185 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 13:56:47,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:56:47,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:47,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:47,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:47,254 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 13:56:47,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077286395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:47,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:47,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 13:56:47,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995387242] [2021-06-05 13:56:47,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:56:47,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:47,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:56:47,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:56:47,255 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 13:56:47,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:47,406 INFO L93 Difference]: Finished difference Result 8145 states and 23520 transitions. [2021-06-05 13:56:47,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:56:47,407 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 13:56:47,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:47,416 INFO L225 Difference]: With dead ends: 8145 [2021-06-05 13:56:47,416 INFO L226 Difference]: Without dead ends: 8145 [2021-06-05 13:56:47,417 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 133.3ms TimeCoverageRelationStatistics Valid=219, Invalid=431, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:56:47,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8145 states. [2021-06-05 13:56:47,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8145 to 7488. [2021-06-05 13:56:47,509 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 13:56:47,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7488 states to 7488 states and 22198 transitions. [2021-06-05 13:56:47,522 INFO L78 Accepts]: Start accepts. Automaton has 7488 states and 22198 transitions. Word has length 22 [2021-06-05 13:56:47,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:47,522 INFO L482 AbstractCegarLoop]: Abstraction has 7488 states and 22198 transitions. [2021-06-05 13:56:47,522 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 13:56:47,522 INFO L276 IsEmpty]: Start isEmpty. Operand 7488 states and 22198 transitions. [2021-06-05 13:56:47,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:47,528 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:47,528 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:47,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2987 [2021-06-05 13:56:47,728 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:47,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:47,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1654246801, now seen corresponding path program 275 times [2021-06-05 13:56:47,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:47,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870437942] [2021-06-05 13:56:47,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:47,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:47,799 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 13:56:47,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:47,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870437942] [2021-06-05 13:56:47,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870437942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:47,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054946199] [2021-06-05 13:56:47,799 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 13:56:47,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:56:47,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:47,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:47,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:47,871 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 13:56:47,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054946199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:47,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:47,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 13:56:47,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520369649] [2021-06-05 13:56:47,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:56:47,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:47,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:56:47,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:56:47,872 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 13:56:48,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:48,015 INFO L93 Difference]: Finished difference Result 9477 states and 27589 transitions. [2021-06-05 13:56:48,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:56:48,016 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 13:56:48,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:48,029 INFO L225 Difference]: With dead ends: 9477 [2021-06-05 13:56:48,029 INFO L226 Difference]: Without dead ends: 9477 [2021-06-05 13:56:48,029 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 124.5ms TimeCoverageRelationStatistics Valid=169, Invalid=383, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:56:48,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9477 states. [2021-06-05 13:56:48,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9477 to 8935. [2021-06-05 13:56:48,141 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 13:56:48,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8935 states to 8935 states and 26539 transitions. [2021-06-05 13:56:48,158 INFO L78 Accepts]: Start accepts. Automaton has 8935 states and 26539 transitions. Word has length 22 [2021-06-05 13:56:48,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:48,158 INFO L482 AbstractCegarLoop]: Abstraction has 8935 states and 26539 transitions. [2021-06-05 13:56:48,158 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 13:56:48,158 INFO L276 IsEmpty]: Start isEmpty. Operand 8935 states and 26539 transitions. [2021-06-05 13:56:48,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:48,166 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:48,166 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:48,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2988,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:48,367 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:48,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:48,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1373263317, now seen corresponding path program 276 times [2021-06-05 13:56:48,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:48,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573455047] [2021-06-05 13:56:48,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:48,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:48,447 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 13:56:48,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:48,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573455047] [2021-06-05 13:56:48,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573455047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:48,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178715460] [2021-06-05 13:56:48,447 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 13:56:48,473 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:56:48,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:48,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:48,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:48,518 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 13:56:48,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178715460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:48,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:48,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 13:56:48,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467706722] [2021-06-05 13:56:48,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:56:48,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:48,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:56:48,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:56:48,519 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 13:56:48,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:48,740 INFO L93 Difference]: Finished difference Result 9543 states and 27760 transitions. [2021-06-05 13:56:48,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:56:48,740 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 13:56:48,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:48,751 INFO L225 Difference]: With dead ends: 9543 [2021-06-05 13:56:48,751 INFO L226 Difference]: Without dead ends: 9543 [2021-06-05 13:56:48,752 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 188.8ms TimeCoverageRelationStatistics Valid=322, Invalid=670, Unknown=0, NotChecked=0, Total=992 [2021-06-05 13:56:48,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9543 states. [2021-06-05 13:56:48,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9543 to 8928. [2021-06-05 13:56:48,851 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 13:56:48,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8928 states to 8928 states and 26517 transitions. [2021-06-05 13:56:48,867 INFO L78 Accepts]: Start accepts. Automaton has 8928 states and 26517 transitions. Word has length 22 [2021-06-05 13:56:48,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:48,867 INFO L482 AbstractCegarLoop]: Abstraction has 8928 states and 26517 transitions. [2021-06-05 13:56:48,867 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 13:56:48,867 INFO L276 IsEmpty]: Start isEmpty. Operand 8928 states and 26517 transitions. [2021-06-05 13:56:48,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:48,874 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:48,874 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:49,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2989 [2021-06-05 13:56:49,077 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:49,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:49,077 INFO L82 PathProgramCache]: Analyzing trace with hash 736796463, now seen corresponding path program 277 times [2021-06-05 13:56:49,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:49,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670217396] [2021-06-05 13:56:49,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:49,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:49,177 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 13:56:49,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:49,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670217396] [2021-06-05 13:56:49,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670217396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:49,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811239019] [2021-06-05 13:56:49,178 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 13:56:49,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:49,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:49,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:49,247 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 13:56:49,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811239019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:49,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:49,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 13:56:49,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93945430] [2021-06-05 13:56:49,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:56:49,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:49,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:56:49,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:56:49,248 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 13:56:49,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:49,580 INFO L93 Difference]: Finished difference Result 10324 states and 30070 transitions. [2021-06-05 13:56:49,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 13:56:49,580 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 13:56:49,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:49,593 INFO L225 Difference]: With dead ends: 10324 [2021-06-05 13:56:49,593 INFO L226 Difference]: Without dead ends: 10324 [2021-06-05 13:56:49,593 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 297.7ms TimeCoverageRelationStatistics Valid=551, Invalid=1089, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 13:56:49,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10324 states. [2021-06-05 13:56:49,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10324 to 9639. [2021-06-05 13:56:49,705 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 13:56:49,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9639 states to 9639 states and 28650 transitions. [2021-06-05 13:56:49,723 INFO L78 Accepts]: Start accepts. Automaton has 9639 states and 28650 transitions. Word has length 22 [2021-06-05 13:56:49,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:49,723 INFO L482 AbstractCegarLoop]: Abstraction has 9639 states and 28650 transitions. [2021-06-05 13:56:49,723 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 13:56:49,723 INFO L276 IsEmpty]: Start isEmpty. Operand 9639 states and 28650 transitions. [2021-06-05 13:56:49,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:49,731 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:49,731 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:49,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2990,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:49,932 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:49,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:49,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1039148775, now seen corresponding path program 278 times [2021-06-05 13:56:49,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:49,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466834312] [2021-06-05 13:56:49,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:49,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:50,021 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 13:56:50,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:50,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466834312] [2021-06-05 13:56:50,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466834312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:50,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068922844] [2021-06-05 13:56:50,022 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 13:56:50,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:56:50,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:50,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:50,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:50,087 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 13:56:50,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068922844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:50,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:50,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-06-05 13:56:50,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303405880] [2021-06-05 13:56:50,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:56:50,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:50,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:56:50,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:56:50,087 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 13:56:50,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:50,370 INFO L93 Difference]: Finished difference Result 9988 states and 29135 transitions. [2021-06-05 13:56:50,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 13:56:50,370 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 13:56:50,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:50,382 INFO L225 Difference]: With dead ends: 9988 [2021-06-05 13:56:50,382 INFO L226 Difference]: Without dead ends: 9980 [2021-06-05 13:56:50,382 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 221.7ms TimeCoverageRelationStatistics Valid=354, Invalid=702, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 13:56:50,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9980 states. [2021-06-05 13:56:50,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9980 to 9589. [2021-06-05 13:56:50,509 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 13:56:50,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9589 states to 9589 states and 28472 transitions. [2021-06-05 13:56:50,527 INFO L78 Accepts]: Start accepts. Automaton has 9589 states and 28472 transitions. Word has length 22 [2021-06-05 13:56:50,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:50,527 INFO L482 AbstractCegarLoop]: Abstraction has 9589 states and 28472 transitions. [2021-06-05 13:56:50,527 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 13:56:50,527 INFO L276 IsEmpty]: Start isEmpty. Operand 9589 states and 28472 transitions. [2021-06-05 13:56:50,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:50,535 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:50,535 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:50,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2991 [2021-06-05 13:56:50,736 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:50,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:50,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1158733017, now seen corresponding path program 279 times [2021-06-05 13:56:50,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:50,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556838948] [2021-06-05 13:56:50,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:50,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:50,824 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 13:56:50,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:50,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556838948] [2021-06-05 13:56:50,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556838948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:50,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014757586] [2021-06-05 13:56:50,824 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 13:56:50,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:56:50,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:50,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:50,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:50,905 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 13:56:50,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014757586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:50,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:50,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 13:56:50,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511757696] [2021-06-05 13:56:50,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:56:50,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:50,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:56:50,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:56:50,906 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 13:56:51,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:51,292 INFO L93 Difference]: Finished difference Result 11995 states and 35313 transitions. [2021-06-05 13:56:51,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 13:56:51,293 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 13:56:51,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:51,306 INFO L225 Difference]: With dead ends: 11995 [2021-06-05 13:56:51,306 INFO L226 Difference]: Without dead ends: 11995 [2021-06-05 13:56:51,307 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 342.0ms TimeCoverageRelationStatistics Valid=699, Invalid=1371, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 13:56:51,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11995 states. [2021-06-05 13:56:51,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11995 to 9342. [2021-06-05 13:56:51,420 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 13:56:51,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9342 states to 9342 states and 27725 transitions. [2021-06-05 13:56:51,435 INFO L78 Accepts]: Start accepts. Automaton has 9342 states and 27725 transitions. Word has length 22 [2021-06-05 13:56:51,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:51,435 INFO L482 AbstractCegarLoop]: Abstraction has 9342 states and 27725 transitions. [2021-06-05 13:56:51,435 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 13:56:51,435 INFO L276 IsEmpty]: Start isEmpty. Operand 9342 states and 27725 transitions. [2021-06-05 13:56:51,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:51,443 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:51,443 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:51,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2992 [2021-06-05 13:56:51,643 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:51,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:51,643 INFO L82 PathProgramCache]: Analyzing trace with hash 876299495, now seen corresponding path program 280 times [2021-06-05 13:56:51,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:51,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254621816] [2021-06-05 13:56:51,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:51,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:51,711 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 13:56:51,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:51,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254621816] [2021-06-05 13:56:51,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254621816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:51,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368954134] [2021-06-05 13:56:51,711 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 13:56:51,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:56:51,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:51,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:51,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:51,788 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 13:56:51,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368954134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:51,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:51,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-05 13:56:51,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772159070] [2021-06-05 13:56:51,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:56:51,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:51,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:56:51,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:56:51,789 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 13:56:52,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:52,051 INFO L93 Difference]: Finished difference Result 9981 states and 29225 transitions. [2021-06-05 13:56:52,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 13:56:52,052 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 13:56:52,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:52,063 INFO L225 Difference]: With dead ends: 9981 [2021-06-05 13:56:52,063 INFO L226 Difference]: Without dead ends: 9981 [2021-06-05 13:56:52,063 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 226.9ms TimeCoverageRelationStatistics Valid=401, Invalid=789, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 13:56:52,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9981 states. [2021-06-05 13:56:52,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9981 to 9425. [2021-06-05 13:56:52,174 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 13:56:52,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9425 states to 9425 states and 27981 transitions. [2021-06-05 13:56:52,189 INFO L78 Accepts]: Start accepts. Automaton has 9425 states and 27981 transitions. Word has length 22 [2021-06-05 13:56:52,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:52,189 INFO L482 AbstractCegarLoop]: Abstraction has 9425 states and 27981 transitions. [2021-06-05 13:56:52,189 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 13:56:52,189 INFO L276 IsEmpty]: Start isEmpty. Operand 9425 states and 27981 transitions. [2021-06-05 13:56:52,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:52,197 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:52,197 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:52,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2993 [2021-06-05 13:56:52,406 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:52,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:52,406 INFO L82 PathProgramCache]: Analyzing trace with hash 369953229, now seen corresponding path program 281 times [2021-06-05 13:56:52,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:52,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183034584] [2021-06-05 13:56:52,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:52,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:52,481 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 13:56:52,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:52,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183034584] [2021-06-05 13:56:52,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183034584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:52,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505033831] [2021-06-05 13:56:52,482 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 13:56:52,508 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:56:52,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:52,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:52,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:52,560 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 13:56:52,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505033831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:52,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:52,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-05 13:56:52,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819987066] [2021-06-05 13:56:52,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:56:52,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:52,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:56:52,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:56:52,561 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 13:56:52,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:52,823 INFO L93 Difference]: Finished difference Result 9826 states and 28836 transitions. [2021-06-05 13:56:52,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 13:56:52,823 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 13:56:52,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:52,834 INFO L225 Difference]: With dead ends: 9826 [2021-06-05 13:56:52,834 INFO L226 Difference]: Without dead ends: 9826 [2021-06-05 13:56:52,835 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 235.2ms TimeCoverageRelationStatistics Valid=422, Invalid=838, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 13:56:52,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9826 states. [2021-06-05 13:56:52,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9826 to 8609. [2021-06-05 13:56:52,933 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 13:56:52,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8609 states to 8609 states and 25511 transitions. [2021-06-05 13:56:52,947 INFO L78 Accepts]: Start accepts. Automaton has 8609 states and 25511 transitions. Word has length 22 [2021-06-05 13:56:52,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:52,947 INFO L482 AbstractCegarLoop]: Abstraction has 8609 states and 25511 transitions. [2021-06-05 13:56:52,948 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 13:56:52,948 INFO L276 IsEmpty]: Start isEmpty. Operand 8609 states and 25511 transitions. [2021-06-05 13:56:52,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:52,954 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:52,954 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:53,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2994 [2021-06-05 13:56:53,155 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:53,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:53,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1853088167, now seen corresponding path program 282 times [2021-06-05 13:56:53,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:53,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194918572] [2021-06-05 13:56:53,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:53,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:53,287 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 13:56:53,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:53,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194918572] [2021-06-05 13:56:53,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194918572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:53,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830579027] [2021-06-05 13:56:53,288 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 13:56:53,315 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:56:53,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:53,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:53,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:53,375 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 13:56:53,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830579027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:53,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:53,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-05 13:56:53,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048199518] [2021-06-05 13:56:53,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:56:53,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:53,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:56:53,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:56:53,376 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 13:56:53,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:53,664 INFO L93 Difference]: Finished difference Result 9527 states and 27764 transitions. [2021-06-05 13:56:53,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 13:56:53,664 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 13:56:53,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:53,681 INFO L225 Difference]: With dead ends: 9527 [2021-06-05 13:56:53,681 INFO L226 Difference]: Without dead ends: 9527 [2021-06-05 13:56:53,681 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 243.5ms TimeCoverageRelationStatistics Valid=302, Invalid=690, Unknown=0, NotChecked=0, Total=992 [2021-06-05 13:56:53,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9527 states. [2021-06-05 13:56:53,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9527 to 9038. [2021-06-05 13:56:53,820 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 13:56:53,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9038 states to 9038 states and 26770 transitions. [2021-06-05 13:56:53,842 INFO L78 Accepts]: Start accepts. Automaton has 9038 states and 26770 transitions. Word has length 22 [2021-06-05 13:56:53,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:53,842 INFO L482 AbstractCegarLoop]: Abstraction has 9038 states and 26770 transitions. [2021-06-05 13:56:53,842 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 13:56:53,842 INFO L276 IsEmpty]: Start isEmpty. Operand 9038 states and 26770 transitions. [2021-06-05 13:56:53,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:53,851 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:53,851 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:54,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2995,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:54,075 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:54,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:54,075 INFO L82 PathProgramCache]: Analyzing trace with hash 585630989, now seen corresponding path program 283 times [2021-06-05 13:56:54,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:54,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823966202] [2021-06-05 13:56:54,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:54,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:54,164 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 13:56:54,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:54,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823966202] [2021-06-05 13:56:54,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823966202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:54,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172504414] [2021-06-05 13:56:54,164 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 13:56:54,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:54,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:54,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:54,245 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 13:56:54,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172504414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:54,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:54,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 13:56:54,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779214381] [2021-06-05 13:56:54,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:56:54,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:54,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:56:54,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:56:54,246 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 13:56:54,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:54,607 INFO L93 Difference]: Finished difference Result 9636 states and 28011 transitions. [2021-06-05 13:56:54,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 13:56:54,607 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 13:56:54,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:54,619 INFO L225 Difference]: With dead ends: 9636 [2021-06-05 13:56:54,619 INFO L226 Difference]: Without dead ends: 9636 [2021-06-05 13:56:54,619 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 320.8ms TimeCoverageRelationStatistics Valid=626, Invalid=1266, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 13:56:54,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9636 states. [2021-06-05 13:56:54,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9636 to 8808. [2021-06-05 13:56:54,718 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 13:56:54,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8808 states to 8808 states and 26076 transitions. [2021-06-05 13:56:54,734 INFO L78 Accepts]: Start accepts. Automaton has 8808 states and 26076 transitions. Word has length 22 [2021-06-05 13:56:54,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:54,734 INFO L482 AbstractCegarLoop]: Abstraction has 8808 states and 26076 transitions. [2021-06-05 13:56:54,734 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 13:56:54,735 INFO L276 IsEmpty]: Start isEmpty. Operand 8808 states and 26076 transitions. [2021-06-05 13:56:54,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:54,742 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:54,742 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:54,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2996 [2021-06-05 13:56:54,942 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:54,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:54,943 INFO L82 PathProgramCache]: Analyzing trace with hash -50835865, now seen corresponding path program 284 times [2021-06-05 13:56:54,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:54,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053252786] [2021-06-05 13:56:54,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:54,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:55,032 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 13:56:55,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:55,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053252786] [2021-06-05 13:56:55,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053252786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:55,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096392603] [2021-06-05 13:56:55,033 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 13:56:55,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:56:55,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:55,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:55,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:55,118 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 13:56:55,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096392603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:55,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:55,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 13:56:55,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592210055] [2021-06-05 13:56:55,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:56:55,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:55,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:56:55,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:56:55,119 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 13:56:55,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:55,529 INFO L93 Difference]: Finished difference Result 9760 states and 28323 transitions. [2021-06-05 13:56:55,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 13:56:55,529 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 13:56:55,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:55,540 INFO L225 Difference]: With dead ends: 9760 [2021-06-05 13:56:55,540 INFO L226 Difference]: Without dead ends: 9760 [2021-06-05 13:56:55,540 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 361.0ms TimeCoverageRelationStatistics Valid=708, Invalid=1454, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 13:56:55,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9760 states. [2021-06-05 13:56:55,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9760 to 8633. [2021-06-05 13:56:55,636 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 13:56:55,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8633 states to 8633 states and 25604 transitions. [2021-06-05 13:56:55,650 INFO L78 Accepts]: Start accepts. Automaton has 8633 states and 25604 transitions. Word has length 22 [2021-06-05 13:56:55,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:55,650 INFO L482 AbstractCegarLoop]: Abstraction has 8633 states and 25604 transitions. [2021-06-05 13:56:55,650 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 13:56:55,651 INFO L276 IsEmpty]: Start isEmpty. Operand 8633 states and 25604 transitions. [2021-06-05 13:56:55,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:55,658 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:55,658 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:55,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2997 [2021-06-05 13:56:55,858 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:55,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:55,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1859354147, now seen corresponding path program 285 times [2021-06-05 13:56:55,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:55,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117726625] [2021-06-05 13:56:55,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:55,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:55,947 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 13:56:55,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:55,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117726625] [2021-06-05 13:56:55,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117726625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:55,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623914216] [2021-06-05 13:56:55,947 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 13:56:55,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 13:56:55,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:55,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:55,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:56,018 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 13:56:56,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623914216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:56,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:56,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-06-05 13:56:56,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981032308] [2021-06-05 13:56:56,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:56:56,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:56,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:56:56,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:56:56,019 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 13:56:56,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:56,268 INFO L93 Difference]: Finished difference Result 8906 states and 25958 transitions. [2021-06-05 13:56:56,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 13:56:56,269 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 13:56:56,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:56,280 INFO L225 Difference]: With dead ends: 8906 [2021-06-05 13:56:56,281 INFO L226 Difference]: Without dead ends: 8900 [2021-06-05 13:56:56,281 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 204.6ms TimeCoverageRelationStatistics Valid=307, Invalid=623, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:56:56,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8900 states. [2021-06-05 13:56:56,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8900 to 8631. [2021-06-05 13:56:56,393 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 13:56:56,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8631 states to 8631 states and 25587 transitions. [2021-06-05 13:56:56,408 INFO L78 Accepts]: Start accepts. Automaton has 8631 states and 25587 transitions. Word has length 22 [2021-06-05 13:56:56,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:56,408 INFO L482 AbstractCegarLoop]: Abstraction has 8631 states and 25587 transitions. [2021-06-05 13:56:56,408 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 13:56:56,408 INFO L276 IsEmpty]: Start isEmpty. Operand 8631 states and 25587 transitions. [2021-06-05 13:56:56,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:56,415 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:56,415 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:56,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2998,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:56,616 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:56,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:56,616 INFO L82 PathProgramCache]: Analyzing trace with hash -903090687, now seen corresponding path program 286 times [2021-06-05 13:56:56,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:56,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928384668] [2021-06-05 13:56:56,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:56,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:56,693 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 13:56:56,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:56,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928384668] [2021-06-05 13:56:56,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928384668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:56,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672265594] [2021-06-05 13:56:56,693 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 13:56:56,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:56:56,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:56,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:56,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:56,778 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 13:56:56,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672265594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:56,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:56,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 17 [2021-06-05 13:56:56,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087096188] [2021-06-05 13:56:56,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:56:56,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:56,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:56:56,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:56:56,779 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 13:56:57,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:57,012 INFO L93 Difference]: Finished difference Result 9990 states and 29311 transitions. [2021-06-05 13:56:57,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 13:56:57,013 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 13:56:57,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:57,023 INFO L225 Difference]: With dead ends: 9990 [2021-06-05 13:56:57,023 INFO L226 Difference]: Without dead ends: 9990 [2021-06-05 13:56:57,023 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 217.0ms TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 13:56:57,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9990 states. [2021-06-05 13:56:57,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9990 to 9751. [2021-06-05 13:56:57,161 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 13:56:57,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9751 states to 9751 states and 28922 transitions. [2021-06-05 13:56:57,178 INFO L78 Accepts]: Start accepts. Automaton has 9751 states and 28922 transitions. Word has length 22 [2021-06-05 13:56:57,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:57,178 INFO L482 AbstractCegarLoop]: Abstraction has 9751 states and 28922 transitions. [2021-06-05 13:56:57,178 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 13:56:57,178 INFO L276 IsEmpty]: Start isEmpty. Operand 9751 states and 28922 transitions. [2021-06-05 13:56:57,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:57,185 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:57,185 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:57,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2999,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:57,386 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:57,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:57,386 INFO L82 PathProgramCache]: Analyzing trace with hash 2124419431, now seen corresponding path program 287 times [2021-06-05 13:56:57,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:57,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804657480] [2021-06-05 13:56:57,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:57,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:57,470 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 13:56:57,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:57,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804657480] [2021-06-05 13:56:57,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804657480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:57,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270527618] [2021-06-05 13:56:57,471 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 13:56:57,497 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:56:57,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:57,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:57,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:57,579 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 13:56:57,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270527618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:57,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:57,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-06-05 13:56:57,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384177123] [2021-06-05 13:56:57,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:56:57,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:57,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:56:57,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:56:57,580 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 13:56:57,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:57,922 INFO L93 Difference]: Finished difference Result 10086 states and 29515 transitions. [2021-06-05 13:56:57,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 13:56:57,922 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 13:56:57,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:57,934 INFO L225 Difference]: With dead ends: 10086 [2021-06-05 13:56:57,934 INFO L226 Difference]: Without dead ends: 10086 [2021-06-05 13:56:57,934 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 308.5ms TimeCoverageRelationStatistics Valid=548, Invalid=1174, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 13:56:57,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10086 states. [2021-06-05 13:56:58,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10086 to 9761. [2021-06-05 13:56:58,039 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 13:56:58,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9761 states to 9761 states and 28952 transitions. [2021-06-05 13:56:58,054 INFO L78 Accepts]: Start accepts. Automaton has 9761 states and 28952 transitions. Word has length 22 [2021-06-05 13:56:58,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:58,054 INFO L482 AbstractCegarLoop]: Abstraction has 9761 states and 28952 transitions. [2021-06-05 13:56:58,055 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 13:56:58,055 INFO L276 IsEmpty]: Start isEmpty. Operand 9761 states and 28952 transitions. [2021-06-05 13:56:58,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:58,062 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:58,062 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:58,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3000,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:58,263 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:58,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:58,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1487952577, now seen corresponding path program 288 times [2021-06-05 13:56:58,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:58,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861637120] [2021-06-05 13:56:58,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:58,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:58,360 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 13:56:58,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:58,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861637120] [2021-06-05 13:56:58,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861637120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:58,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873371418] [2021-06-05 13:56:58,360 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 13:56:58,386 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:56:58,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:58,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:58,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:58,449 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 13:56:58,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873371418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:58,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:58,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-06-05 13:56:58,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601934580] [2021-06-05 13:56:58,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:56:58,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:58,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:56:58,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:56:58,450 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 13:56:58,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:58,852 INFO L93 Difference]: Finished difference Result 11404 states and 33374 transitions. [2021-06-05 13:56:58,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 13:56:58,852 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 13:56:58,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:58,867 INFO L225 Difference]: With dead ends: 11404 [2021-06-05 13:56:58,868 INFO L226 Difference]: Without dead ends: 11404 [2021-06-05 13:56:58,868 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 352.0ms TimeCoverageRelationStatistics Valid=666, Invalid=1404, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 13:56:58,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11404 states. [2021-06-05 13:56:58,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11404 to 10779. [2021-06-05 13:56:58,999 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 13:56:59,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10779 states to 10779 states and 31999 transitions. [2021-06-05 13:56:59,021 INFO L78 Accepts]: Start accepts. Automaton has 10779 states and 31999 transitions. Word has length 22 [2021-06-05 13:56:59,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:59,021 INFO L482 AbstractCegarLoop]: Abstraction has 10779 states and 31999 transitions. [2021-06-05 13:56:59,021 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 13:56:59,021 INFO L276 IsEmpty]: Start isEmpty. Operand 10779 states and 31999 transitions. [2021-06-05 13:56:59,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:59,030 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:59,030 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:59,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3001 [2021-06-05 13:56:59,231 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:59,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:59,231 INFO L82 PathProgramCache]: Analyzing trace with hash -53850265, now seen corresponding path program 289 times [2021-06-05 13:56:59,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:59,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909642066] [2021-06-05 13:56:59,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:59,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:59,319 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 13:56:59,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:59,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909642066] [2021-06-05 13:56:59,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909642066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:59,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858875060] [2021-06-05 13:56:59,320 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 13:56:59,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:59,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:56:59,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:59,383 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 13:56:59,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858875060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:59,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:59,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 16 [2021-06-05 13:56:59,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583850945] [2021-06-05 13:56:59,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:56:59,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:59,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:56:59,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:56:59,384 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 13:56:59,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:59,629 INFO L93 Difference]: Finished difference Result 10976 states and 32234 transitions. [2021-06-05 13:56:59,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 13:56:59,629 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 13:56:59,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:59,642 INFO L225 Difference]: With dead ends: 10976 [2021-06-05 13:56:59,642 INFO L226 Difference]: Without dead ends: 10972 [2021-06-05 13:56:59,642 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 177.6ms TimeCoverageRelationStatistics Valid=266, Invalid=546, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:56:59,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10972 states. [2021-06-05 13:56:59,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10972 to 10779. [2021-06-05 13:56:59,767 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 13:56:59,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10779 states to 10779 states and 31996 transitions. [2021-06-05 13:56:59,785 INFO L78 Accepts]: Start accepts. Automaton has 10779 states and 31996 transitions. Word has length 22 [2021-06-05 13:56:59,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:59,785 INFO L482 AbstractCegarLoop]: Abstraction has 10779 states and 31996 transitions. [2021-06-05 13:56:59,785 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 13:56:59,785 INFO L276 IsEmpty]: Start isEmpty. Operand 10779 states and 31996 transitions. [2021-06-05 13:56:59,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:56:59,794 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:59,794 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:59,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3002,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:59,994 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:59,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:59,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1510450393, now seen corresponding path program 290 times [2021-06-05 13:56:59,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:59,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441037058] [2021-06-05 13:56:59,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:59,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:00,087 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 13:57:00,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:00,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441037058] [2021-06-05 13:57:00,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441037058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:00,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524544809] [2021-06-05 13:57:00,087 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 13:57:00,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:57:00,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:00,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:57:00,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:00,184 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 13:57:00,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524544809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:00,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:00,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 19 [2021-06-05 13:57:00,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41317920] [2021-06-05 13:57:00,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:57:00,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:00,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:57:00,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:57:00,185 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 13:57:00,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:00,524 INFO L93 Difference]: Finished difference Result 13145 states and 38658 transitions. [2021-06-05 13:57:00,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 13:57:00,525 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 13:57:00,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:00,544 INFO L225 Difference]: With dead ends: 13145 [2021-06-05 13:57:00,545 INFO L226 Difference]: Without dead ends: 13145 [2021-06-05 13:57:00,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 319.1ms TimeCoverageRelationStatistics Valid=549, Invalid=1257, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 13:57:00,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13145 states. [2021-06-05 13:57:00,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13145 to 12431. [2021-06-05 13:57:00,698 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 13:57:00,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12431 states to 12431 states and 36946 transitions. [2021-06-05 13:57:00,721 INFO L78 Accepts]: Start accepts. Automaton has 12431 states and 36946 transitions. Word has length 22 [2021-06-05 13:57:00,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:00,721 INFO L482 AbstractCegarLoop]: Abstraction has 12431 states and 36946 transitions. [2021-06-05 13:57:00,721 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 13:57:00,721 INFO L276 IsEmpty]: Start isEmpty. Operand 12431 states and 36946 transitions. [2021-06-05 13:57:00,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:57:00,731 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:00,731 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:00,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3003,292 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:00,931 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:00,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:00,932 INFO L82 PathProgramCache]: Analyzing trace with hash -808303197, now seen corresponding path program 291 times [2021-06-05 13:57:00,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:00,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014681917] [2021-06-05 13:57:00,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:00,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:01,027 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 13:57:01,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:01,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014681917] [2021-06-05 13:57:01,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014681917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:01,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080679751] [2021-06-05 13:57:01,027 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 13:57:01,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 13:57:01,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:01,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:57:01,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:01,158 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 13:57:01,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080679751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:01,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:01,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 16 [2021-06-05 13:57:01,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868125342] [2021-06-05 13:57:01,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:57:01,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:01,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:57:01,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:57:01,159 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 13:57:01,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:01,380 INFO L93 Difference]: Finished difference Result 12636 states and 37217 transitions. [2021-06-05 13:57:01,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 13:57:01,380 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 13:57:01,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:01,395 INFO L225 Difference]: With dead ends: 12636 [2021-06-05 13:57:01,395 INFO L226 Difference]: Without dead ends: 12634 [2021-06-05 13:57:01,396 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 217.5ms TimeCoverageRelationStatistics Valid=231, Invalid=471, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:57:01,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12634 states. [2021-06-05 13:57:01,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12634 to 12451. [2021-06-05 13:57:01,546 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 13:57:01,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12451 states to 12451 states and 37010 transitions. [2021-06-05 13:57:01,568 INFO L78 Accepts]: Start accepts. Automaton has 12451 states and 37010 transitions. Word has length 22 [2021-06-05 13:57:01,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:01,568 INFO L482 AbstractCegarLoop]: Abstraction has 12451 states and 37010 transitions. [2021-06-05 13:57:01,568 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 13:57:01,568 INFO L276 IsEmpty]: Start isEmpty. Operand 12451 states and 37010 transitions. [2021-06-05 13:57:01,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:57:01,577 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:01,577 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:01,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3004,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:01,778 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:01,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:01,778 INFO L82 PathProgramCache]: Analyzing trace with hash 909445863, now seen corresponding path program 292 times [2021-06-05 13:57:01,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:01,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982111746] [2021-06-05 13:57:01,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:01,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:01,865 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 13:57:01,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:01,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982111746] [2021-06-05 13:57:01,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982111746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:01,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099203704] [2021-06-05 13:57:01,865 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 13:57:01,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:57:01,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:01,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:57:01,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:01,935 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 13:57:01,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099203704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:01,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:01,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 16 [2021-06-05 13:57:01,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578354030] [2021-06-05 13:57:01,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:57:01,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:01,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:57:01,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:57:01,936 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 13:57:02,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:02,120 INFO L93 Difference]: Finished difference Result 13016 states and 38296 transitions. [2021-06-05 13:57:02,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:57:02,121 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 13:57:02,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:02,136 INFO L225 Difference]: With dead ends: 13016 [2021-06-05 13:57:02,136 INFO L226 Difference]: Without dead ends: 13016 [2021-06-05 13:57:02,136 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 170.2ms TimeCoverageRelationStatistics Valid=266, Invalid=546, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:57:02,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13016 states. [2021-06-05 13:57:02,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13016 to 12452. [2021-06-05 13:57:02,276 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 13:57:02,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12452 states to 12452 states and 37011 transitions. [2021-06-05 13:57:02,298 INFO L78 Accepts]: Start accepts. Automaton has 12452 states and 37011 transitions. Word has length 22 [2021-06-05 13:57:02,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:02,298 INFO L482 AbstractCegarLoop]: Abstraction has 12452 states and 37011 transitions. [2021-06-05 13:57:02,298 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 13:57:02,298 INFO L276 IsEmpty]: Start isEmpty. Operand 12452 states and 37011 transitions. [2021-06-05 13:57:02,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:57:02,307 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:02,307 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:02,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3005,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:02,508 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:02,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:02,508 INFO L82 PathProgramCache]: Analyzing trace with hash -819601471, now seen corresponding path program 293 times [2021-06-05 13:57:02,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:02,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902039227] [2021-06-05 13:57:02,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:02,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:02,595 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 13:57:02,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:02,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902039227] [2021-06-05 13:57:02,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902039227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:02,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625921973] [2021-06-05 13:57:02,595 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 13:57:02,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:57:02,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:02,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:57:02,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:02,678 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 13:57:02,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625921973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:02,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:02,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 17 [2021-06-05 13:57:02,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40908617] [2021-06-05 13:57:02,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:57:02,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:02,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:57:02,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:57:02,679 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 13:57:02,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:02,911 INFO L93 Difference]: Finished difference Result 13404 states and 39370 transitions. [2021-06-05 13:57:02,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 13:57:02,911 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 13:57:02,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:02,927 INFO L225 Difference]: With dead ends: 13404 [2021-06-05 13:57:02,927 INFO L226 Difference]: Without dead ends: 13404 [2021-06-05 13:57:02,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 219.9ms TimeCoverageRelationStatistics Valid=375, Invalid=815, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 13:57:02,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13404 states. [2021-06-05 13:57:03,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13404 to 12456. [2021-06-05 13:57:03,067 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 13:57:03,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12456 states to 12456 states and 37021 transitions. [2021-06-05 13:57:03,091 INFO L78 Accepts]: Start accepts. Automaton has 12456 states and 37021 transitions. Word has length 22 [2021-06-05 13:57:03,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:03,091 INFO L482 AbstractCegarLoop]: Abstraction has 12456 states and 37021 transitions. [2021-06-05 13:57:03,091 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 13:57:03,091 INFO L276 IsEmpty]: Start isEmpty. Operand 12456 states and 37021 transitions. [2021-06-05 13:57:03,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:57:03,100 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:03,100 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:03,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3006,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:03,301 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:03,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:03,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1414506023, now seen corresponding path program 294 times [2021-06-05 13:57:03,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:03,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996419737] [2021-06-05 13:57:03,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:03,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:03,397 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 13:57:03,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:03,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996419737] [2021-06-05 13:57:03,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996419737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:03,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116421411] [2021-06-05 13:57:03,398 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 13:57:03,424 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:57:03,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:03,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:57:03,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:03,481 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 13:57:03,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116421411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:03,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:03,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 17 [2021-06-05 13:57:03,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845527693] [2021-06-05 13:57:03,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:57:03,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:03,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:57:03,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:57:03,482 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 13:57:03,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:03,798 INFO L93 Difference]: Finished difference Result 15061 states and 44163 transitions. [2021-06-05 13:57:03,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 13:57:03,799 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 13:57:03,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:03,817 INFO L225 Difference]: With dead ends: 15061 [2021-06-05 13:57:03,817 INFO L226 Difference]: Without dead ends: 15061 [2021-06-05 13:57:03,817 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 279.8ms TimeCoverageRelationStatistics Valid=471, Invalid=1089, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 13:57:03,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15061 states. [2021-06-05 13:57:03,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15061 to 13737. [2021-06-05 13:57:03,981 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 13:57:04,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13737 states to 13737 states and 40884 transitions. [2021-06-05 13:57:04,005 INFO L78 Accepts]: Start accepts. Automaton has 13737 states and 40884 transitions. Word has length 22 [2021-06-05 13:57:04,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:04,005 INFO L482 AbstractCegarLoop]: Abstraction has 13737 states and 40884 transitions. [2021-06-05 13:57:04,006 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 13:57:04,006 INFO L276 IsEmpty]: Start isEmpty. Operand 13737 states and 40884 transitions. [2021-06-05 13:57:04,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:57:04,016 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:04,016 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:04,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3007,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:04,216 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:04,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:04,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1952361601, now seen corresponding path program 295 times [2021-06-05 13:57:04,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:04,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661940142] [2021-06-05 13:57:04,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:04,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:04,303 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 13:57:04,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:04,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661940142] [2021-06-05 13:57:04,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661940142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:04,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147761349] [2021-06-05 13:57:04,303 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 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 13:57:04,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:04,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:57:04,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:04,418 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 13:57:04,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147761349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:04,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:04,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 18 [2021-06-05 13:57:04,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255406558] [2021-06-05 13:57:04,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:57:04,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:04,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:57:04,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:57:04,419 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 13:57:04,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:04,800 INFO L93 Difference]: Finished difference Result 14989 states and 43964 transitions. [2021-06-05 13:57:04,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 13:57:04,801 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 13:57:04,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:04,820 INFO L225 Difference]: With dead ends: 14989 [2021-06-05 13:57:04,820 INFO L226 Difference]: Without dead ends: 14989 [2021-06-05 13:57:04,820 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 316.3ms TimeCoverageRelationStatistics Valid=523, Invalid=1199, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 13:57:04,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14989 states. [2021-06-05 13:57:04,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14989 to 13759. [2021-06-05 13:57:04,989 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 13:57:05,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13759 states to 13759 states and 40949 transitions. [2021-06-05 13:57:05,014 INFO L78 Accepts]: Start accepts. Automaton has 13759 states and 40949 transitions. Word has length 22 [2021-06-05 13:57:05,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:05,014 INFO L482 AbstractCegarLoop]: Abstraction has 13759 states and 40949 transitions. [2021-06-05 13:57:05,014 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 13:57:05,014 INFO L276 IsEmpty]: Start isEmpty. Operand 13759 states and 40949 transitions. [2021-06-05 13:57:05,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:57:05,024 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:05,025 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:05,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3008 [2021-06-05 13:57:05,225 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:05,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:05,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1446015335, now seen corresponding path program 296 times [2021-06-05 13:57:05,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:05,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362229082] [2021-06-05 13:57:05,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:05,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:05,314 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 13:57:05,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:05,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362229082] [2021-06-05 13:57:05,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362229082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:05,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797925278] [2021-06-05 13:57:05,315 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 13:57:05,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:57:05,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:05,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:57:05,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:05,403 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 13:57:05,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797925278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:05,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:05,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 18 [2021-06-05 13:57:05,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804416730] [2021-06-05 13:57:05,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:57:05,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:05,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:57:05,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:57:05,404 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 13:57:05,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:05,757 INFO L93 Difference]: Finished difference Result 17231 states and 50882 transitions. [2021-06-05 13:57:05,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 13:57:05,757 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 13:57:05,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:05,779 INFO L225 Difference]: With dead ends: 17231 [2021-06-05 13:57:05,779 INFO L226 Difference]: Without dead ends: 17231 [2021-06-05 13:57:05,779 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 299.2ms TimeCoverageRelationStatistics Valid=518, Invalid=1204, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 13:57:05,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17231 states. [2021-06-05 13:57:05,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17231 to 16400. [2021-06-05 13:57:05,984 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 13:57:06,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16400 states to 16400 states and 48876 transitions. [2021-06-05 13:57:06,016 INFO L78 Accepts]: Start accepts. Automaton has 16400 states and 48876 transitions. Word has length 22 [2021-06-05 13:57:06,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:06,016 INFO L482 AbstractCegarLoop]: Abstraction has 16400 states and 48876 transitions. [2021-06-05 13:57:06,016 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 13:57:06,016 INFO L276 IsEmpty]: Start isEmpty. Operand 16400 states and 48876 transitions. [2021-06-05 13:57:06,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:57:06,029 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:06,029 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:06,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3009 [2021-06-05 13:57:06,229 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:06,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:06,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1365817023, now seen corresponding path program 297 times [2021-06-05 13:57:06,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:06,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929788727] [2021-06-05 13:57:06,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:06,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:06,321 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 13:57:06,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:06,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929788727] [2021-06-05 13:57:06,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929788727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:06,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448529467] [2021-06-05 13:57:06,322 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 13:57:06,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:57:06,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:06,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:57:06,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:06,423 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 13:57:06,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448529467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:06,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:06,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 19 [2021-06-05 13:57:06,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199449844] [2021-06-05 13:57:06,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:57:06,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:06,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:57:06,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:57:06,424 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 13:57:06,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:06,741 INFO L93 Difference]: Finished difference Result 17044 states and 50389 transitions. [2021-06-05 13:57:06,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 13:57:06,741 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 13:57:06,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:06,765 INFO L225 Difference]: With dead ends: 17044 [2021-06-05 13:57:06,765 INFO L226 Difference]: Without dead ends: 17044 [2021-06-05 13:57:06,765 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 288.5ms TimeCoverageRelationStatistics Valid=459, Invalid=1101, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 13:57:06,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17044 states. [2021-06-05 13:57:06,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17044 to 16341. [2021-06-05 13:57:06,975 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 13:57:07,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16341 states to 16341 states and 48697 transitions. [2021-06-05 13:57:07,005 INFO L78 Accepts]: Start accepts. Automaton has 16341 states and 48697 transitions. Word has length 22 [2021-06-05 13:57:07,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:07,006 INFO L482 AbstractCegarLoop]: Abstraction has 16341 states and 48697 transitions. [2021-06-05 13:57:07,006 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 13:57:07,006 INFO L276 IsEmpty]: Start isEmpty. Operand 16341 states and 48697 transitions. [2021-06-05 13:57:07,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:57:07,017 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:07,017 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:07,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3010,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:07,218 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:07,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:07,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1661693095, now seen corresponding path program 298 times [2021-06-05 13:57:07,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:07,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008826772] [2021-06-05 13:57:07,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:07,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:07,309 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 13:57:07,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:07,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008826772] [2021-06-05 13:57:07,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008826772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:07,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730991124] [2021-06-05 13:57:07,309 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 13:57:07,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:57:07,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:07,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:57:07,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:07,405 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 13:57:07,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730991124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:07,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:07,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 19 [2021-06-05 13:57:07,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920290363] [2021-06-05 13:57:07,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:57:07,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:07,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:57:07,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:57:07,406 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 13:57:07,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:07,699 INFO L93 Difference]: Finished difference Result 18181 states and 53895 transitions. [2021-06-05 13:57:07,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 13:57:07,700 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 13:57:07,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:07,724 INFO L225 Difference]: With dead ends: 18181 [2021-06-05 13:57:07,725 INFO L226 Difference]: Without dead ends: 18181 [2021-06-05 13:57:07,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 276.3ms TimeCoverageRelationStatistics Valid=427, Invalid=1055, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 13:57:07,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18181 states. [2021-06-05 13:57:07,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18181 to 17672. [2021-06-05 13:57:07,998 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 13:57:08,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17672 states to 17672 states and 52700 transitions. [2021-06-05 13:57:08,030 INFO L78 Accepts]: Start accepts. Automaton has 17672 states and 52700 transitions. Word has length 22 [2021-06-05 13:57:08,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:08,030 INFO L482 AbstractCegarLoop]: Abstraction has 17672 states and 52700 transitions. [2021-06-05 13:57:08,030 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 13:57:08,030 INFO L276 IsEmpty]: Start isEmpty. Operand 17672 states and 52700 transitions. [2021-06-05 13:57:08,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:57:08,044 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:08,044 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:08,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3011 [2021-06-05 13:57:08,244 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:08,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:08,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1025226241, now seen corresponding path program 299 times [2021-06-05 13:57:08,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:08,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639659200] [2021-06-05 13:57:08,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:08,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:08,338 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 13:57:08,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:08,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639659200] [2021-06-05 13:57:08,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639659200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:08,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287045548] [2021-06-05 13:57:08,338 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 13:57:08,364 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:57:08,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:08,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:57:08,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:08,441 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 13:57:08,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287045548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:08,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:08,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 20 [2021-06-05 13:57:08,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577394426] [2021-06-05 13:57:08,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:57:08,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:08,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:57:08,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:57:08,442 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 13:57:08,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:08,774 INFO L93 Difference]: Finished difference Result 18327 states and 54324 transitions. [2021-06-05 13:57:08,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 13:57:08,774 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 13:57:08,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:08,801 INFO L225 Difference]: With dead ends: 18327 [2021-06-05 13:57:08,801 INFO L226 Difference]: Without dead ends: 18327 [2021-06-05 13:57:08,801 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 295.9ms TimeCoverageRelationStatistics Valid=469, Invalid=1171, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 13:57:08,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18327 states. [2021-06-05 13:57:09,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18327 to 17682. [2021-06-05 13:57:09,047 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 13:57:09,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17682 states to 17682 states and 52729 transitions. [2021-06-05 13:57:09,084 INFO L78 Accepts]: Start accepts. Automaton has 17682 states and 52729 transitions. Word has length 22 [2021-06-05 13:57:09,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:09,084 INFO L482 AbstractCegarLoop]: Abstraction has 17682 states and 52729 transitions. [2021-06-05 13:57:09,084 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 13:57:09,084 INFO L276 IsEmpty]: Start isEmpty. Operand 17682 states and 52729 transitions. [2021-06-05 13:57:09,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 13:57:09,099 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:09,099 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:09,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 301 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3012 [2021-06-05 13:57:09,300 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:09,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:09,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1525377049, now seen corresponding path program 300 times [2021-06-05 13:57:09,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:09,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934409469] [2021-06-05 13:57:09,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:09,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:09,400 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 13:57:09,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:09,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934409469] [2021-06-05 13:57:09,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934409469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:09,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073161118] [2021-06-05 13:57:09,401 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 13:57:09,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:57:09,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:09,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:57:09,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:09,519 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 13:57:09,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073161118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:09,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:09,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-06-05 13:57:09,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677359427] [2021-06-05 13:57:09,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:57:09,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:09,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:57:09,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:57:09,520 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 13:57:10,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:10,007 INFO L93 Difference]: Finished difference Result 19601 states and 58121 transitions. [2021-06-05 13:57:10,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 13:57:10,009 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 13:57:10,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:10,041 INFO L225 Difference]: With dead ends: 19601 [2021-06-05 13:57:10,041 INFO L226 Difference]: Without dead ends: 19601 [2021-06-05 13:57:10,042 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 437.5ms TimeCoverageRelationStatistics Valid=858, Invalid=2004, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 13:57:10,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19601 states. [2021-06-05 13:57:10,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19601 to 17866. [2021-06-05 13:57:10,338 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 13:57:10,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17866 states to 17866 states and 53282 transitions. [2021-06-05 13:57:10,382 INFO L78 Accepts]: Start accepts. Automaton has 17866 states and 53282 transitions. Word has length 22 [2021-06-05 13:57:10,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:10,382 INFO L482 AbstractCegarLoop]: Abstraction has 17866 states and 53282 transitions. [2021-06-05 13:57:10,382 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 13:57:10,382 INFO L276 IsEmpty]: Start isEmpty. Operand 17866 states and 53282 transitions. [2021-06-05 13:57:10,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:57:10,399 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:10,399 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:10,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3013,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:10,620 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:10,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:10,620 INFO L82 PathProgramCache]: Analyzing trace with hash -120035998, now seen corresponding path program 301 times [2021-06-05 13:57:10,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:10,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207856937] [2021-06-05 13:57:10,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:10,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:10,689 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 13:57:10,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:10,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207856937] [2021-06-05 13:57:10,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207856937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:10,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369040446] [2021-06-05 13:57:10,689 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 13:57:10,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:10,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:57:10,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:10,762 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 13:57:10,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369040446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:10,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:10,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-06-05 13:57:10,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453834051] [2021-06-05 13:57:10,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:57:10,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:10,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:57:10,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:57:10,763 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 13:57:11,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:11,008 INFO L93 Difference]: Finished difference Result 18113 states and 53632 transitions. [2021-06-05 13:57:11,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 13:57:11,009 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 13:57:11,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:11,037 INFO L225 Difference]: With dead ends: 18113 [2021-06-05 13:57:11,037 INFO L226 Difference]: Without dead ends: 18109 [2021-06-05 13:57:11,038 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 140.3ms TimeCoverageRelationStatistics Valid=225, Invalid=425, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:57:11,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18109 states. [2021-06-05 13:57:11,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18109 to 17844. [2021-06-05 13:57:11,457 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 13:57:11,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17844 states to 17844 states and 53197 transitions. [2021-06-05 13:57:11,502 INFO L78 Accepts]: Start accepts. Automaton has 17844 states and 53197 transitions. Word has length 23 [2021-06-05 13:57:11,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:11,502 INFO L482 AbstractCegarLoop]: Abstraction has 17844 states and 53197 transitions. [2021-06-05 13:57:11,502 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 13:57:11,502 INFO L276 IsEmpty]: Start isEmpty. Operand 17844 states and 53197 transitions. [2021-06-05 13:57:11,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:57:11,519 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:11,519 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:11,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3014,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:11,741 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:11,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:11,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1369368998, now seen corresponding path program 302 times [2021-06-05 13:57:11,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:11,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985880229] [2021-06-05 13:57:11,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:11,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:11,837 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 13:57:11,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:11,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985880229] [2021-06-05 13:57:11,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985880229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:11,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202341386] [2021-06-05 13:57:11,838 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 13:57:11,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:57:11,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:11,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:57:11,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:11,918 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 13:57:11,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202341386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:11,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:11,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-06-05 13:57:11,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242294059] [2021-06-05 13:57:11,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:57:11,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:11,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:57:11,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:57:11,919 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 13:57:12,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:12,204 INFO L93 Difference]: Finished difference Result 18088 states and 53547 transitions. [2021-06-05 13:57:12,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 13:57:12,204 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 13:57:12,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:12,234 INFO L225 Difference]: With dead ends: 18088 [2021-06-05 13:57:12,234 INFO L226 Difference]: Without dead ends: 18082 [2021-06-05 13:57:12,235 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 167.9ms TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:57:12,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18082 states. [2021-06-05 13:57:12,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18082 to 17833. [2021-06-05 13:57:12,542 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 13:57:12,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17833 states to 17833 states and 53154 transitions. [2021-06-05 13:57:12,585 INFO L78 Accepts]: Start accepts. Automaton has 17833 states and 53154 transitions. Word has length 23 [2021-06-05 13:57:12,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:12,585 INFO L482 AbstractCegarLoop]: Abstraction has 17833 states and 53154 transitions. [2021-06-05 13:57:12,586 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 13:57:12,586 INFO L276 IsEmpty]: Start isEmpty. Operand 17833 states and 53154 transitions. [2021-06-05 13:57:12,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:57:12,603 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:12,603 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:12,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3015,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:12,824 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:12,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:12,825 INFO L82 PathProgramCache]: Analyzing trace with hash 296283618, now seen corresponding path program 303 times [2021-06-05 13:57:12,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:12,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133678085] [2021-06-05 13:57:12,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:12,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:12,936 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 13:57:12,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:12,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133678085] [2021-06-05 13:57:12,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133678085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:12,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294784059] [2021-06-05 13:57:12,937 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 13:57:12,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 13:57:12,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:12,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:57:12,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:13,021 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 13:57:13,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294784059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:13,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:13,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 13:57:13,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220818697] [2021-06-05 13:57:13,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:57:13,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:13,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:57:13,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:57:13,022 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 13:57:13,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:13,305 INFO L93 Difference]: Finished difference Result 18081 states and 53510 transitions. [2021-06-05 13:57:13,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 13:57:13,306 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 13:57:13,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:13,331 INFO L225 Difference]: With dead ends: 18081 [2021-06-05 13:57:13,331 INFO L226 Difference]: Without dead ends: 18075 [2021-06-05 13:57:13,332 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 186.5ms TimeCoverageRelationStatistics Valid=292, Invalid=578, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:57:13,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18075 states. [2021-06-05 13:57:13,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18075 to 17833. [2021-06-05 13:57:13,622 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 13:57:13,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17833 states to 17833 states and 53146 transitions. [2021-06-05 13:57:13,664 INFO L78 Accepts]: Start accepts. Automaton has 17833 states and 53146 transitions. Word has length 23 [2021-06-05 13:57:13,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:13,665 INFO L482 AbstractCegarLoop]: Abstraction has 17833 states and 53146 transitions. [2021-06-05 13:57:13,665 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 13:57:13,665 INFO L276 IsEmpty]: Start isEmpty. Operand 17833 states and 53146 transitions. [2021-06-05 13:57:13,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:57:13,682 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:13,682 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:13,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3016 [2021-06-05 13:57:13,903 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:13,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:13,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1390375206, now seen corresponding path program 304 times [2021-06-05 13:57:13,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:13,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864968680] [2021-06-05 13:57:13,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:13,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:13,986 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 13:57:13,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:13,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864968680] [2021-06-05 13:57:13,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864968680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:13,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920812012] [2021-06-05 13:57:13,986 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 13:57:14,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:57:14,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:14,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:57:14,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:14,066 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 13:57:14,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920812012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:14,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:14,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-06-05 13:57:14,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611587655] [2021-06-05 13:57:14,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:57:14,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:14,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:57:14,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:57:14,068 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 13:57:14,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:14,349 INFO L93 Difference]: Finished difference Result 18366 states and 54302 transitions. [2021-06-05 13:57:14,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:57:14,349 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 13:57:14,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:14,386 INFO L225 Difference]: With dead ends: 18366 [2021-06-05 13:57:14,386 INFO L226 Difference]: Without dead ends: 18358 [2021-06-05 13:57:14,387 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 174.8ms TimeCoverageRelationStatistics Valid=241, Invalid=515, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:57:14,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18358 states. [2021-06-05 13:57:14,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18358 to 17840. [2021-06-05 13:57:14,680 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 13:57:14,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17840 states to 17840 states and 53162 transitions. [2021-06-05 13:57:14,722 INFO L78 Accepts]: Start accepts. Automaton has 17840 states and 53162 transitions. Word has length 23 [2021-06-05 13:57:14,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:14,722 INFO L482 AbstractCegarLoop]: Abstraction has 17840 states and 53162 transitions. [2021-06-05 13:57:14,722 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 13:57:14,722 INFO L276 IsEmpty]: Start isEmpty. Operand 17840 states and 53162 transitions. [2021-06-05 13:57:14,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:57:14,739 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:14,739 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:14,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3017,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:14,961 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:14,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:14,961 INFO L82 PathProgramCache]: Analyzing trace with hash 900986926, now seen corresponding path program 305 times [2021-06-05 13:57:14,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:14,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102500324] [2021-06-05 13:57:14,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:14,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:15,047 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 13:57:15,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:15,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102500324] [2021-06-05 13:57:15,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102500324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:15,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627821984] [2021-06-05 13:57:15,048 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 13:57:15,082 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 13:57:15,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:15,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:57:15,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:15,270 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-06-05 13:57:15,289 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 13:57:15,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627821984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:15,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:15,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-06-05 13:57:15,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470525496] [2021-06-05 13:57:15,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:57:15,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:15,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:57:15,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:57:15,291 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 13:57:15,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:15,560 INFO L93 Difference]: Finished difference Result 18066 states and 53531 transitions. [2021-06-05 13:57:15,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 13:57:15,561 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 13:57:15,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:15,590 INFO L225 Difference]: With dead ends: 18066 [2021-06-05 13:57:15,590 INFO L226 Difference]: Without dead ends: 18058 [2021-06-05 13:57:15,591 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 175.3ms TimeCoverageRelationStatistics Valid=268, Invalid=544, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:57:15,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18058 states. [2021-06-05 13:57:15,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18058 to 17835. [2021-06-05 13:57:15,874 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 13:57:15,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17835 states to 17835 states and 53142 transitions. [2021-06-05 13:57:15,919 INFO L78 Accepts]: Start accepts. Automaton has 17835 states and 53142 transitions. Word has length 23 [2021-06-05 13:57:15,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:15,919 INFO L482 AbstractCegarLoop]: Abstraction has 17835 states and 53142 transitions. [2021-06-05 13:57:15,920 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 13:57:15,920 INFO L276 IsEmpty]: Start isEmpty. Operand 17835 states and 53142 transitions. [2021-06-05 13:57:15,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:57:15,936 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:15,936 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:16,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3018 [2021-06-05 13:57:16,152 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:16,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:16,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1037982158, now seen corresponding path program 306 times [2021-06-05 13:57:16,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:16,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549673137] [2021-06-05 13:57:16,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:16,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:16,221 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 13:57:16,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:16,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549673137] [2021-06-05 13:57:16,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549673137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:16,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986175355] [2021-06-05 13:57:16,222 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 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 13:57:16,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 13:57:16,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:16,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:57:16,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:16,306 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 13:57:16,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986175355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:16,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:16,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:57:16,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725602881] [2021-06-05 13:57:16,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:57:16,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:16,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:57:16,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:57:16,311 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 13:57:16,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:16,464 INFO L93 Difference]: Finished difference Result 18191 states and 53712 transitions. [2021-06-05 13:57:16,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:57:16,464 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 13:57:16,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:16,500 INFO L225 Difference]: With dead ends: 18191 [2021-06-05 13:57:16,500 INFO L226 Difference]: Without dead ends: 18189 [2021-06-05 13:57:16,500 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 71.5ms TimeCoverageRelationStatistics Valid=100, Invalid=140, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:57:16,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18189 states. [2021-06-05 13:57:16,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18189 to 17847. [2021-06-05 13:57:16,817 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 13:57:16,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17847 states to 17847 states and 53170 transitions. [2021-06-05 13:57:16,861 INFO L78 Accepts]: Start accepts. Automaton has 17847 states and 53170 transitions. Word has length 23 [2021-06-05 13:57:16,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:16,861 INFO L482 AbstractCegarLoop]: Abstraction has 17847 states and 53170 transitions. [2021-06-05 13:57:16,861 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 13:57:16,861 INFO L276 IsEmpty]: Start isEmpty. Operand 17847 states and 53170 transitions. [2021-06-05 13:57:16,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:57:16,878 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:16,878 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:17,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3019,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:17,099 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:17,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:17,100 INFO L82 PathProgramCache]: Analyzing trace with hash 707472532, now seen corresponding path program 307 times [2021-06-05 13:57:17,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:17,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534305187] [2021-06-05 13:57:17,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:17,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:17,174 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 13:57:17,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:17,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534305187] [2021-06-05 13:57:17,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534305187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:17,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215617457] [2021-06-05 13:57:17,174 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 13:57:17,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:17,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:57:17,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:17,254 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 13:57:17,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215617457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:17,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:17,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-06-05 13:57:17,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052771981] [2021-06-05 13:57:17,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:57:17,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:17,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:57:17,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:57:17,255 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 13:57:17,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:17,444 INFO L93 Difference]: Finished difference Result 18272 states and 53872 transitions. [2021-06-05 13:57:17,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:57:17,444 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 13:57:17,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:17,480 INFO L225 Difference]: With dead ends: 18272 [2021-06-05 13:57:17,480 INFO L226 Difference]: Without dead ends: 18271 [2021-06-05 13:57:17,480 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 92.3ms TimeCoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:57:17,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18271 states. [2021-06-05 13:57:17,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18271 to 17840. [2021-06-05 13:57:17,798 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 13:57:17,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17840 states to 17840 states and 53132 transitions. [2021-06-05 13:57:17,844 INFO L78 Accepts]: Start accepts. Automaton has 17840 states and 53132 transitions. Word has length 23 [2021-06-05 13:57:17,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:17,844 INFO L482 AbstractCegarLoop]: Abstraction has 17840 states and 53132 transitions. [2021-06-05 13:57:17,845 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 13:57:17,845 INFO L276 IsEmpty]: Start isEmpty. Operand 17840 states and 53132 transitions. [2021-06-05 13:57:17,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:57:17,862 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:17,862 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:18,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3020 [2021-06-05 13:57:18,084 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:18,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:18,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1876881456, now seen corresponding path program 308 times [2021-06-05 13:57:18,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:18,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092809530] [2021-06-05 13:57:18,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:18,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:18,150 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 13:57:18,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:18,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092809530] [2021-06-05 13:57:18,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092809530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:18,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584240919] [2021-06-05 13:57:18,151 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 13:57:18,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:57:18,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:18,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:57:18,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:18,227 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 13:57:18,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584240919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:18,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:18,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-06-05 13:57:18,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434142724] [2021-06-05 13:57:18,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:57:18,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:18,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:57:18,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:57:18,228 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 13:57:18,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:18,474 INFO L93 Difference]: Finished difference Result 18131 states and 53544 transitions. [2021-06-05 13:57:18,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:57:18,475 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 13:57:18,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:18,506 INFO L225 Difference]: With dead ends: 18131 [2021-06-05 13:57:18,506 INFO L226 Difference]: Without dead ends: 18126 [2021-06-05 13:57:18,506 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 132.5ms TimeCoverageRelationStatistics Valid=210, Invalid=390, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:57:18,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18126 states. [2021-06-05 13:57:18,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18126 to 17829. [2021-06-05 13:57:18,921 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 13:57:18,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17829 states to 17829 states and 53073 transitions. [2021-06-05 13:57:18,966 INFO L78 Accepts]: Start accepts. Automaton has 17829 states and 53073 transitions. Word has length 23 [2021-06-05 13:57:18,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:18,967 INFO L482 AbstractCegarLoop]: Abstraction has 17829 states and 53073 transitions. [2021-06-05 13:57:18,967 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 13:57:18,967 INFO L276 IsEmpty]: Start isEmpty. Operand 17829 states and 53073 transitions. [2021-06-05 13:57:18,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:57:18,984 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:18,984 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:19,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3021 [2021-06-05 13:57:19,206 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:19,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:19,207 INFO L82 PathProgramCache]: Analyzing trace with hash -387476460, now seen corresponding path program 309 times [2021-06-05 13:57:19,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:19,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615059936] [2021-06-05 13:57:19,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:19,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:19,309 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 13:57:19,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:19,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615059936] [2021-06-05 13:57:19,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615059936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:19,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665041655] [2021-06-05 13:57:19,310 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 13:57:19,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 13:57:19,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:19,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:57:19,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:19,389 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 13:57:19,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665041655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:19,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:19,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 13:57:19,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291085105] [2021-06-05 13:57:19,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:57:19,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:19,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:57:19,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:57:19,391 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 13:57:19,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:19,666 INFO L93 Difference]: Finished difference Result 18120 states and 53485 transitions. [2021-06-05 13:57:19,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 13:57:19,666 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 13:57:19,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:19,692 INFO L225 Difference]: With dead ends: 18120 [2021-06-05 13:57:19,692 INFO L226 Difference]: Without dead ends: 18110 [2021-06-05 13:57:19,692 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 167.7ms TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:57:19,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18110 states. [2021-06-05 13:57:19,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18110 to 17810. [2021-06-05 13:57:19,926 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 13:57:19,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17810 states to 17810 states and 52998 transitions. [2021-06-05 13:57:19,958 INFO L78 Accepts]: Start accepts. Automaton has 17810 states and 52998 transitions. Word has length 23 [2021-06-05 13:57:19,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:19,958 INFO L482 AbstractCegarLoop]: Abstraction has 17810 states and 52998 transitions. [2021-06-05 13:57:19,958 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 13:57:19,958 INFO L276 IsEmpty]: Start isEmpty. Operand 17810 states and 52998 transitions. [2021-06-05 13:57:19,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:57:19,972 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:19,972 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:20,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3022,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:20,173 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:20,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:20,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1460561840, now seen corresponding path program 310 times [2021-06-05 13:57:20,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:20,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159808514] [2021-06-05 13:57:20,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:20,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:20,239 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 13:57:20,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:20,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159808514] [2021-06-05 13:57:20,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159808514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:20,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263512441] [2021-06-05 13:57:20,239 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 13:57:20,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:57:20,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:20,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:57:20,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:20,298 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 13:57:20,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263512441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:20,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:20,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-06-05 13:57:20,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378372257] [2021-06-05 13:57:20,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:57:20,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:20,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:57:20,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:57:20,299 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 13:57:20,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:20,482 INFO L93 Difference]: Finished difference Result 18994 states and 55842 transitions. [2021-06-05 13:57:20,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:57:20,482 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 13:57:20,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:20,505 INFO L225 Difference]: With dead ends: 18994 [2021-06-05 13:57:20,506 INFO L226 Difference]: Without dead ends: 18988 [2021-06-05 13:57:20,506 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 118.8ms TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:57:20,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18988 states. [2021-06-05 13:57:20,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18988 to 17829. [2021-06-05 13:57:20,714 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 13:57:20,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17829 states to 17829 states and 53046 transitions. [2021-06-05 13:57:20,744 INFO L78 Accepts]: Start accepts. Automaton has 17829 states and 53046 transitions. Word has length 23 [2021-06-05 13:57:20,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:20,744 INFO L482 AbstractCegarLoop]: Abstraction has 17829 states and 53046 transitions. [2021-06-05 13:57:20,745 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 13:57:20,745 INFO L276 IsEmpty]: Start isEmpty. Operand 17829 states and 53046 transitions. [2021-06-05 13:57:20,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:57:20,758 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:20,758 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:20,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3023 [2021-06-05 13:57:20,958 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:20,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:20,958 INFO L82 PathProgramCache]: Analyzing trace with hash -366470252, now seen corresponding path program 311 times [2021-06-05 13:57:20,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:20,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141077992] [2021-06-05 13:57:20,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:20,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:21,047 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 13:57:21,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:21,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141077992] [2021-06-05 13:57:21,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141077992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:21,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198782302] [2021-06-05 13:57:21,048 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 13:57:21,074 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 13:57:21,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:21,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:57:21,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:21,110 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 13:57:21,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198782302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:21,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:21,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 13:57:21,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390328658] [2021-06-05 13:57:21,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:57:21,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:21,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:57:21,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:57:21,111 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 13:57:21,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:21,314 INFO L93 Difference]: Finished difference Result 19008 states and 55851 transitions. [2021-06-05 13:57:21,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:57:21,314 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 13:57:21,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:21,338 INFO L225 Difference]: With dead ends: 19008 [2021-06-05 13:57:21,338 INFO L226 Difference]: Without dead ends: 19000 [2021-06-05 13:57:21,339 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 141.0ms TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:57:21,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19000 states. [2021-06-05 13:57:21,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19000 to 17854. [2021-06-05 13:57:21,560 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 13:57:21,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17854 states to 17854 states and 53119 transitions. [2021-06-05 13:57:21,593 INFO L78 Accepts]: Start accepts. Automaton has 17854 states and 53119 transitions. Word has length 23 [2021-06-05 13:57:21,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:21,593 INFO L482 AbstractCegarLoop]: Abstraction has 17854 states and 53119 transitions. [2021-06-05 13:57:21,593 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 13:57:21,593 INFO L276 IsEmpty]: Start isEmpty. Operand 17854 states and 53119 transitions. [2021-06-05 13:57:21,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:57:21,607 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:21,607 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:21,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3024,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:21,807 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:21,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:21,808 INFO L82 PathProgramCache]: Analyzing trace with hash -809369392, now seen corresponding path program 312 times [2021-06-05 13:57:21,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:21,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931835672] [2021-06-05 13:57:21,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:21,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:21,976 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 13:57:21,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:21,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931835672] [2021-06-05 13:57:21,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931835672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:21,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51597754] [2021-06-05 13:57:21,976 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 13:57:22,004 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 13:57:22,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:22,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:57:22,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:22,039 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 13:57:22,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51597754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:22,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:22,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 13:57:22,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768871447] [2021-06-05 13:57:22,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:57:22,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:22,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:57:22,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:57:22,040 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 13:57:22,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:22,277 INFO L93 Difference]: Finished difference Result 18500 states and 54560 transitions. [2021-06-05 13:57:22,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:57:22,278 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 13:57:22,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:22,303 INFO L225 Difference]: With dead ends: 18500 [2021-06-05 13:57:22,303 INFO L226 Difference]: Without dead ends: 18490 [2021-06-05 13:57:22,303 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 162.7ms TimeCoverageRelationStatistics Valid=257, Invalid=555, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:57:22,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18490 states. [2021-06-05 13:57:22,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18490 to 17854. [2021-06-05 13:57:22,526 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 13:57:22,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17854 states to 17854 states and 53115 transitions. [2021-06-05 13:57:22,558 INFO L78 Accepts]: Start accepts. Automaton has 17854 states and 53115 transitions. Word has length 23 [2021-06-05 13:57:22,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:22,558 INFO L482 AbstractCegarLoop]: Abstraction has 17854 states and 53115 transitions. [2021-06-05 13:57:22,559 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 13:57:22,559 INFO L276 IsEmpty]: Start isEmpty. Operand 17854 states and 53115 transitions. [2021-06-05 13:57:22,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:57:22,572 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:22,572 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:22,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3025,314 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:22,773 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:22,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:22,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1196093342, now seen corresponding path program 313 times [2021-06-05 13:57:22,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:22,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698382032] [2021-06-05 13:57:22,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:22,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:22,838 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 13:57:22,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:22,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698382032] [2021-06-05 13:57:22,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698382032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:22,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671406622] [2021-06-05 13:57:22,838 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 13:57:22,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:22,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:57:22,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:22,901 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 13:57:22,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671406622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:22,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:22,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-06-05 13:57:22,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936732534] [2021-06-05 13:57:22,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:57:22,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:22,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:57:22,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:57:22,902 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 13:57:23,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:23,115 INFO L93 Difference]: Finished difference Result 18151 states and 53567 transitions. [2021-06-05 13:57:23,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:57:23,115 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 13:57:23,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:23,137 INFO L225 Difference]: With dead ends: 18151 [2021-06-05 13:57:23,138 INFO L226 Difference]: Without dead ends: 18139 [2021-06-05 13:57:23,138 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 123.8ms TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:57:23,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18139 states. [2021-06-05 13:57:23,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18139 to 17811. [2021-06-05 13:57:23,365 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 13:57:23,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17811 states to 17811 states and 52972 transitions. [2021-06-05 13:57:23,400 INFO L78 Accepts]: Start accepts. Automaton has 17811 states and 52972 transitions. Word has length 23 [2021-06-05 13:57:23,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:23,400 INFO L482 AbstractCegarLoop]: Abstraction has 17811 states and 52972 transitions. [2021-06-05 13:57:23,400 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 13:57:23,400 INFO L276 IsEmpty]: Start isEmpty. Operand 17811 states and 52972 transitions. [2021-06-05 13:57:23,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:57:23,417 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:23,417 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:23,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3026,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:23,617 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:23,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:23,618 INFO L82 PathProgramCache]: Analyzing trace with hash -102001754, now seen corresponding path program 314 times [2021-06-05 13:57:23,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:23,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891786260] [2021-06-05 13:57:23,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:23,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:23,689 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 13:57:23,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:23,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891786260] [2021-06-05 13:57:23,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891786260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:23,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411983376] [2021-06-05 13:57:23,690 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 13:57:23,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:57:23,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:23,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:57:23,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:23,749 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 13:57:23,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411983376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:23,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:23,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-06-05 13:57:23,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907494682] [2021-06-05 13:57:23,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:57:23,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:23,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:57:23,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:57:23,750 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 13:57:23,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:23,978 INFO L93 Difference]: Finished difference Result 18119 states and 53440 transitions. [2021-06-05 13:57:23,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:57:23,979 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 13:57:23,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:24,002 INFO L225 Difference]: With dead ends: 18119 [2021-06-05 13:57:24,002 INFO L226 Difference]: Without dead ends: 18107 [2021-06-05 13:57:24,002 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 140.0ms TimeCoverageRelationStatistics Valid=248, Invalid=508, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:57:24,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18107 states. [2021-06-05 13:57:24,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18107 to 17779. [2021-06-05 13:57:24,233 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 13:57:24,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17779 states to 17779 states and 52877 transitions. [2021-06-05 13:57:24,265 INFO L78 Accepts]: Start accepts. Automaton has 17779 states and 52877 transitions. Word has length 23 [2021-06-05 13:57:24,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:24,265 INFO L482 AbstractCegarLoop]: Abstraction has 17779 states and 52877 transitions. [2021-06-05 13:57:24,265 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 13:57:24,265 INFO L276 IsEmpty]: Start isEmpty. Operand 17779 states and 52877 transitions. [2021-06-05 13:57:24,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:57:24,279 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:24,279 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:24,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3027,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:24,479 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:24,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:24,480 INFO L82 PathProgramCache]: Analyzing trace with hash -544900894, now seen corresponding path program 315 times [2021-06-05 13:57:24,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:24,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262308360] [2021-06-05 13:57:24,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:24,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:24,554 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 13:57:24,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:24,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262308360] [2021-06-05 13:57:24,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262308360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:24,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548136543] [2021-06-05 13:57:24,555 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 13:57:24,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:57:24,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:24,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:57:24,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:24,617 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 13:57:24,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548136543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:24,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:24,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 13:57:24,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910265187] [2021-06-05 13:57:24,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:57:24,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:24,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:57:24,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:57:24,617 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 13:57:24,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:24,930 INFO L93 Difference]: Finished difference Result 18547 states and 54582 transitions. [2021-06-05 13:57:24,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 13:57:24,930 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 13:57:24,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:24,956 INFO L225 Difference]: With dead ends: 18547 [2021-06-05 13:57:24,956 INFO L226 Difference]: Without dead ends: 18532 [2021-06-05 13:57:24,957 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 164.5ms TimeCoverageRelationStatistics Valid=282, Invalid=588, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:57:24,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18532 states. [2021-06-05 13:57:25,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18532 to 17766. [2021-06-05 13:57:25,230 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 13:57:25,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17766 states to 17766 states and 52848 transitions. [2021-06-05 13:57:25,269 INFO L78 Accepts]: Start accepts. Automaton has 17766 states and 52848 transitions. Word has length 23 [2021-06-05 13:57:25,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:25,269 INFO L482 AbstractCegarLoop]: Abstraction has 17766 states and 52848 transitions. [2021-06-05 13:57:25,269 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 13:57:25,269 INFO L276 IsEmpty]: Start isEmpty. Operand 17766 states and 52848 transitions. [2021-06-05 13:57:25,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:57:25,285 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:25,285 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:25,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3028,317 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:25,485 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:25,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:25,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1199463112, now seen corresponding path program 316 times [2021-06-05 13:57:25,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:25,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890875228] [2021-06-05 13:57:25,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:25,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:25,570 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 13:57:25,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:25,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890875228] [2021-06-05 13:57:25,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890875228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:25,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737654660] [2021-06-05 13:57:25,571 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 13:57:25,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:57:25,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:25,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:57:25,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:25,645 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 13:57:25,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737654660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:25,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:25,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-06-05 13:57:25,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608507611] [2021-06-05 13:57:25,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:57:25,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:25,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:57:25,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:57:25,646 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 13:57:25,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:25,923 INFO L93 Difference]: Finished difference Result 18019 states and 53257 transitions. [2021-06-05 13:57:25,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 13:57:25,923 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 13:57:25,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:25,951 INFO L225 Difference]: With dead ends: 18019 [2021-06-05 13:57:25,951 INFO L226 Difference]: Without dead ends: 18009 [2021-06-05 13:57:25,952 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 177.7ms TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:57:25,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18009 states. [2021-06-05 13:57:26,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18009 to 17756. [2021-06-05 13:57:26,211 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 13:57:26,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17756 states to 17756 states and 52811 transitions. [2021-06-05 13:57:26,248 INFO L78 Accepts]: Start accepts. Automaton has 17756 states and 52811 transitions. Word has length 23 [2021-06-05 13:57:26,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:26,248 INFO L482 AbstractCegarLoop]: Abstraction has 17756 states and 52811 transitions. [2021-06-05 13:57:26,248 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 13:57:26,248 INFO L276 IsEmpty]: Start isEmpty. Operand 17756 states and 52811 transitions. [2021-06-05 13:57:26,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:57:26,264 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:26,264 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:26,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3029,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:26,464 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:26,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:26,465 INFO L82 PathProgramCache]: Analyzing trace with hash 334383492, now seen corresponding path program 317 times [2021-06-05 13:57:26,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:26,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053909632] [2021-06-05 13:57:26,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:26,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:26,517 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 13:57:26,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:26,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053909632] [2021-06-05 13:57:26,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053909632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:26,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801781589] [2021-06-05 13:57:26,517 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 13:57:26,545 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:57:26,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:26,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:57:26,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:26,585 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 13:57:26,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801781589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:26,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:26,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-06-05 13:57:26,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960362744] [2021-06-05 13:57:26,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:57:26,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:26,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:57:26,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:57:26,586 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 13:57:26,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:26,705 INFO L93 Difference]: Finished difference Result 18147 states and 53443 transitions. [2021-06-05 13:57:26,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:57:26,705 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 13:57:26,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:26,728 INFO L225 Difference]: With dead ends: 18147 [2021-06-05 13:57:26,728 INFO L226 Difference]: Without dead ends: 18147 [2021-06-05 13:57:26,729 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 60.6ms TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:57:26,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18147 states. [2021-06-05 13:57:26,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18147 to 17763. [2021-06-05 13:57:26,957 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 13:57:26,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17763 states to 17763 states and 52815 transitions. [2021-06-05 13:57:26,990 INFO L78 Accepts]: Start accepts. Automaton has 17763 states and 52815 transitions. Word has length 23 [2021-06-05 13:57:26,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:26,990 INFO L482 AbstractCegarLoop]: Abstraction has 17763 states and 52815 transitions. [2021-06-05 13:57:26,990 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 13:57:26,990 INFO L276 IsEmpty]: Start isEmpty. Operand 17763 states and 52815 transitions. [2021-06-05 13:57:27,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:57:27,004 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:27,004 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:27,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3030 [2021-06-05 13:57:27,205 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:27,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:27,205 INFO L82 PathProgramCache]: Analyzing trace with hash -504515806, now seen corresponding path program 318 times [2021-06-05 13:57:27,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:27,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086008795] [2021-06-05 13:57:27,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:27,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:27,263 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 13:57:27,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:27,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086008795] [2021-06-05 13:57:27,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086008795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:27,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106335811] [2021-06-05 13:57:27,263 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 13:57:27,291 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 13:57:27,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:27,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:57:27,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:27,326 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 13:57:27,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106335811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:27,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:27,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:57:27,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223183740] [2021-06-05 13:57:27,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:57:27,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:27,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:57:27,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:57:27,327 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 13:57:27,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:27,526 INFO L93 Difference]: Finished difference Result 18064 states and 53237 transitions. [2021-06-05 13:57:27,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:57:27,526 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 13:57:27,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:27,550 INFO L225 Difference]: With dead ends: 18064 [2021-06-05 13:57:27,550 INFO L226 Difference]: Without dead ends: 18059 [2021-06-05 13:57:27,551 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 106.0ms TimeCoverageRelationStatistics Valid=194, Invalid=358, Unknown=0, NotChecked=0, Total=552 [2021-06-05 13:57:27,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18059 states. [2021-06-05 13:57:27,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18059 to 17747. [2021-06-05 13:57:27,786 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 13:57:27,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17747 states to 17747 states and 52734 transitions. [2021-06-05 13:57:27,822 INFO L78 Accepts]: Start accepts. Automaton has 17747 states and 52734 transitions. Word has length 23 [2021-06-05 13:57:27,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:27,822 INFO L482 AbstractCegarLoop]: Abstraction has 17747 states and 52734 transitions. [2021-06-05 13:57:27,822 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 13:57:27,822 INFO L276 IsEmpty]: Start isEmpty. Operand 17747 states and 52734 transitions. [2021-06-05 13:57:27,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:57:27,836 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:27,836 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:28,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3031 [2021-06-05 13:57:28,037 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:28,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:28,037 INFO L82 PathProgramCache]: Analyzing trace with hash 984889190, now seen corresponding path program 319 times [2021-06-05 13:57:28,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:28,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413232736] [2021-06-05 13:57:28,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:28,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:28,098 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 13:57:28,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:28,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413232736] [2021-06-05 13:57:28,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413232736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:28,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266214922] [2021-06-05 13:57:28,099 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 13:57:28,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:28,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:57:28,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:28,163 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 13:57:28,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266214922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:28,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:28,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-06-05 13:57:28,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542042967] [2021-06-05 13:57:28,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:57:28,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:28,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:57:28,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:57:28,164 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 13:57:28,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:28,386 INFO L93 Difference]: Finished difference Result 18047 states and 53156 transitions. [2021-06-05 13:57:28,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:57:28,387 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 13:57:28,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:28,412 INFO L225 Difference]: With dead ends: 18047 [2021-06-05 13:57:28,412 INFO L226 Difference]: Without dead ends: 18039 [2021-06-05 13:57:28,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 122.0ms TimeCoverageRelationStatistics Valid=222, Invalid=428, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:57:28,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18039 states. [2021-06-05 13:57:28,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18039 to 17721. [2021-06-05 13:57:28,700 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 13:57:28,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17721 states to 17721 states and 52634 transitions. [2021-06-05 13:57:28,737 INFO L78 Accepts]: Start accepts. Automaton has 17721 states and 52634 transitions. Word has length 23 [2021-06-05 13:57:28,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:28,737 INFO L482 AbstractCegarLoop]: Abstraction has 17721 states and 52634 transitions. [2021-06-05 13:57:28,737 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 13:57:28,737 INFO L276 IsEmpty]: Start isEmpty. Operand 17721 states and 52634 transitions. [2021-06-05 13:57:28,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:57:28,753 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:28,753 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:28,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3032,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:28,954 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:28,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:28,954 INFO L82 PathProgramCache]: Analyzing trace with hash -88196190, now seen corresponding path program 320 times [2021-06-05 13:57:28,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:28,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403495953] [2021-06-05 13:57:28,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:29,020 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 13:57:29,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:29,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403495953] [2021-06-05 13:57:29,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403495953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:29,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549752237] [2021-06-05 13:57:29,020 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 13:57:29,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:57:29,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:29,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:57:29,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:29,086 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 13:57:29,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549752237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:29,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:29,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-06-05 13:57:29,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514014457] [2021-06-05 13:57:29,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:57:29,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:29,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:57:29,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:57:29,087 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 13:57:29,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:29,311 INFO L93 Difference]: Finished difference Result 18021 states and 53057 transitions. [2021-06-05 13:57:29,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 13:57:29,312 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 13:57:29,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:29,336 INFO L225 Difference]: With dead ends: 18021 [2021-06-05 13:57:29,336 INFO L226 Difference]: Without dead ends: 18012 [2021-06-05 13:57:29,336 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 137.5ms TimeCoverageRelationStatistics Valid=253, Invalid=503, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:57:29,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18012 states. [2021-06-05 13:57:29,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18012 to 17705. [2021-06-05 13:57:29,574 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 13:57:29,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17705 states to 17705 states and 52577 transitions. [2021-06-05 13:57:29,607 INFO L78 Accepts]: Start accepts. Automaton has 17705 states and 52577 transitions. Word has length 23 [2021-06-05 13:57:29,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:29,608 INFO L482 AbstractCegarLoop]: Abstraction has 17705 states and 52577 transitions. [2021-06-05 13:57:29,608 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 13:57:29,608 INFO L276 IsEmpty]: Start isEmpty. Operand 17705 states and 52577 transitions. [2021-06-05 13:57:29,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:57:29,623 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:29,623 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:29,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3033 [2021-06-05 13:57:29,823 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:29,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:29,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1005895398, now seen corresponding path program 321 times [2021-06-05 13:57:29,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:29,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896972438] [2021-06-05 13:57:29,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:29,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:29,900 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 13:57:29,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:29,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896972438] [2021-06-05 13:57:29,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896972438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:29,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835608812] [2021-06-05 13:57:29,900 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 13:57:29,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:57:29,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:29,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:57:29,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:29,970 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 13:57:29,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835608812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:29,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:29,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 13:57:29,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98580684] [2021-06-05 13:57:29,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:57:29,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:29,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:57:29,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:57:29,971 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 13:57:30,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:30,184 INFO L93 Difference]: Finished difference Result 19443 states and 56893 transitions. [2021-06-05 13:57:30,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:57:30,184 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 13:57:30,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:30,208 INFO L225 Difference]: With dead ends: 19443 [2021-06-05 13:57:30,208 INFO L226 Difference]: Without dead ends: 19435 [2021-06-05 13:57:30,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 143.5ms TimeCoverageRelationStatistics Valid=243, Invalid=513, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:57:30,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19435 states. [2021-06-05 13:57:30,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19435 to 17759. [2021-06-05 13:57:30,424 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 13:57:30,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17759 states to 17759 states and 52720 transitions. [2021-06-05 13:57:30,455 INFO L78 Accepts]: Start accepts. Automaton has 17759 states and 52720 transitions. Word has length 23 [2021-06-05 13:57:30,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:30,455 INFO L482 AbstractCegarLoop]: Abstraction has 17759 states and 52720 transitions. [2021-06-05 13:57:30,455 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 13:57:30,455 INFO L276 IsEmpty]: Start isEmpty. Operand 17759 states and 52720 transitions. [2021-06-05 13:57:30,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:57:30,469 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:30,469 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:30,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 323 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3034 [2021-06-05 13:57:30,669 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:30,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:30,669 INFO L82 PathProgramCache]: Analyzing trace with hash 562996258, now seen corresponding path program 322 times [2021-06-05 13:57:30,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:30,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913367163] [2021-06-05 13:57:30,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:30,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:30,762 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 13:57:30,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:30,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913367163] [2021-06-05 13:57:30,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913367163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:30,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204329285] [2021-06-05 13:57:30,763 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 13:57:30,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:57:30,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:30,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:57:30,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:30,829 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 13:57:30,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204329285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:30,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:30,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-06-05 13:57:30,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111927045] [2021-06-05 13:57:30,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:57:30,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:30,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:57:30,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:57:30,830 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 13:57:31,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:31,065 INFO L93 Difference]: Finished difference Result 19462 states and 56909 transitions. [2021-06-05 13:57:31,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 13:57:31,065 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 13:57:31,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:31,089 INFO L225 Difference]: With dead ends: 19462 [2021-06-05 13:57:31,089 INFO L226 Difference]: Without dead ends: 19452 [2021-06-05 13:57:31,089 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 168.2ms TimeCoverageRelationStatistics Valid=278, Invalid=592, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:57:31,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19452 states. [2021-06-05 13:57:31,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19452 to 17815. [2021-06-05 13:57:31,313 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 13:57:31,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17815 states to 17815 states and 52868 transitions. [2021-06-05 13:57:31,345 INFO L78 Accepts]: Start accepts. Automaton has 17815 states and 52868 transitions. Word has length 23 [2021-06-05 13:57:31,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:31,346 INFO L482 AbstractCegarLoop]: Abstraction has 17815 states and 52868 transitions. [2021-06-05 13:57:31,346 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 13:57:31,346 INFO L276 IsEmpty]: Start isEmpty. Operand 17815 states and 52868 transitions. [2021-06-05 13:57:31,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:57:31,359 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:31,359 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:31,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3035,324 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:31,560 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:31,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:31,560 INFO L82 PathProgramCache]: Analyzing trace with hash -281975194, now seen corresponding path program 323 times [2021-06-05 13:57:31,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:31,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602679973] [2021-06-05 13:57:31,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:31,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:31,640 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 13:57:31,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:31,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602679973] [2021-06-05 13:57:31,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602679973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:31,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409766415] [2021-06-05 13:57:31,641 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 13:57:31,668 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:57:31,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:31,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:57:31,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:31,709 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 13:57:31,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409766415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:31,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:31,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-06-05 13:57:31,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991242910] [2021-06-05 13:57:31,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:57:31,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:31,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:57:31,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:57:31,710 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 13:57:31,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:31,987 INFO L93 Difference]: Finished difference Result 18858 states and 55259 transitions. [2021-06-05 13:57:31,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 13:57:31,987 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 13:57:31,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:32,014 INFO L225 Difference]: With dead ends: 18858 [2021-06-05 13:57:32,014 INFO L226 Difference]: Without dead ends: 18846 [2021-06-05 13:57:32,015 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 200.1ms TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 13:57:32,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18846 states. [2021-06-05 13:57:32,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18846 to 17815. [2021-06-05 13:57:32,297 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 13:57:32,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17815 states to 17815 states and 52863 transitions. [2021-06-05 13:57:32,330 INFO L78 Accepts]: Start accepts. Automaton has 17815 states and 52863 transitions. Word has length 23 [2021-06-05 13:57:32,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:32,330 INFO L482 AbstractCegarLoop]: Abstraction has 17815 states and 52863 transitions. [2021-06-05 13:57:32,330 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 13:57:32,330 INFO L276 IsEmpty]: Start isEmpty. Operand 17815 states and 52863 transitions. [2021-06-05 13:57:32,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:57:32,343 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:32,344 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:32,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3036,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:32,544 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:32,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:32,544 INFO L82 PathProgramCache]: Analyzing trace with hash 614484244, now seen corresponding path program 324 times [2021-06-05 13:57:32,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:32,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399515667] [2021-06-05 13:57:32,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:32,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:32,622 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 13:57:32,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:32,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399515667] [2021-06-05 13:57:32,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399515667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:32,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29247230] [2021-06-05 13:57:32,622 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 13:57:32,649 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:57:32,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:32,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:57:32,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:32,689 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 13:57:32,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29247230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:32,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:32,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 13:57:32,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849460629] [2021-06-05 13:57:32,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:57:32,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:32,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:57:32,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:57:32,690 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 13:57:32,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:32,918 INFO L93 Difference]: Finished difference Result 18134 states and 53387 transitions. [2021-06-05 13:57:32,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:57:32,919 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 13:57:32,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:32,941 INFO L225 Difference]: With dead ends: 18134 [2021-06-05 13:57:32,942 INFO L226 Difference]: Without dead ends: 18122 [2021-06-05 13:57:32,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 141.6ms TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:57:32,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18122 states. [2021-06-05 13:57:33,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18122 to 17754. [2021-06-05 13:57:33,186 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 13:57:33,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17754 states to 17754 states and 52669 transitions. [2021-06-05 13:57:33,225 INFO L78 Accepts]: Start accepts. Automaton has 17754 states and 52669 transitions. Word has length 23 [2021-06-05 13:57:33,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:33,225 INFO L482 AbstractCegarLoop]: Abstraction has 17754 states and 52669 transitions. [2021-06-05 13:57:33,225 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 13:57:33,225 INFO L276 IsEmpty]: Start isEmpty. Operand 17754 states and 52669 transitions. [2021-06-05 13:57:33,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:57:33,241 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:33,241 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:33,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3037 [2021-06-05 13:57:33,442 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:33,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:33,442 INFO L82 PathProgramCache]: Analyzing trace with hash 171585104, now seen corresponding path program 325 times [2021-06-05 13:57:33,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:33,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033159961] [2021-06-05 13:57:33,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:33,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:33,528 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 13:57:33,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:33,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033159961] [2021-06-05 13:57:33,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033159961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:33,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965733884] [2021-06-05 13:57:33,528 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 13:57:33,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:33,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:57:33,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:33,587 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 13:57:33,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965733884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:33,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:33,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-06-05 13:57:33,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642187440] [2021-06-05 13:57:33,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:57:33,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:33,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:57:33,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:57:33,588 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 13:57:33,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:33,824 INFO L93 Difference]: Finished difference Result 18086 states and 53214 transitions. [2021-06-05 13:57:33,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:57:33,824 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 13:57:33,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:33,849 INFO L225 Difference]: With dead ends: 18086 [2021-06-05 13:57:33,849 INFO L226 Difference]: Without dead ends: 18076 [2021-06-05 13:57:33,849 INFO L777 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 13:57:33,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18076 states. [2021-06-05 13:57:34,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18076 to 17750. [2021-06-05 13:57:34,085 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 13:57:34,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17750 states to 17750 states and 52652 transitions. [2021-06-05 13:57:34,118 INFO L78 Accepts]: Start accepts. Automaton has 17750 states and 52652 transitions. Word has length 23 [2021-06-05 13:57:34,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:34,118 INFO L482 AbstractCegarLoop]: Abstraction has 17750 states and 52652 transitions. [2021-06-05 13:57:34,118 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 13:57:34,118 INFO L276 IsEmpty]: Start isEmpty. Operand 17750 states and 52652 transitions. [2021-06-05 13:57:34,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:57:34,132 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:34,132 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:34,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3038,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:34,333 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:34,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:34,333 INFO L82 PathProgramCache]: Analyzing trace with hash -673386348, now seen corresponding path program 326 times [2021-06-05 13:57:34,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:34,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67915350] [2021-06-05 13:57:34,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:34,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:34,467 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 13:57:34,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:34,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67915350] [2021-06-05 13:57:34,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67915350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:34,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11310408] [2021-06-05 13:57:34,468 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 13:57:34,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:57:34,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:34,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:57:34,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:34,541 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 13:57:34,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11310408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:34,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:34,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-06-05 13:57:34,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278061293] [2021-06-05 13:57:34,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:57:34,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:34,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:57:34,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:57:34,542 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 13:57:34,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:34,843 INFO L93 Difference]: Finished difference Result 18572 states and 54522 transitions. [2021-06-05 13:57:34,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 13:57:34,844 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 13:57:34,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:34,870 INFO L225 Difference]: With dead ends: 18572 [2021-06-05 13:57:34,871 INFO L226 Difference]: Without dead ends: 18560 [2021-06-05 13:57:34,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 238.3ms TimeCoverageRelationStatistics Valid=315, Invalid=677, Unknown=0, NotChecked=0, Total=992 [2021-06-05 13:57:34,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18560 states. [2021-06-05 13:57:35,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18560 to 17743. [2021-06-05 13:57:35,098 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 13:57:35,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17743 states to 17743 states and 52631 transitions. [2021-06-05 13:57:35,131 INFO L78 Accepts]: Start accepts. Automaton has 17743 states and 52631 transitions. Word has length 23 [2021-06-05 13:57:35,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:35,131 INFO L482 AbstractCegarLoop]: Abstraction has 17743 states and 52631 transitions. [2021-06-05 13:57:35,131 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 13:57:35,131 INFO L276 IsEmpty]: Start isEmpty. Operand 17743 states and 52631 transitions. [2021-06-05 13:57:35,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:57:35,146 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:35,146 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:35,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3039,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:35,347 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:35,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:35,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1862290286, now seen corresponding path program 327 times [2021-06-05 13:57:35,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:35,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782092526] [2021-06-05 13:57:35,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:35,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:35,436 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 13:57:35,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:35,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782092526] [2021-06-05 13:57:35,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782092526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:35,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833745769] [2021-06-05 13:57:35,436 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 13:57:35,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:57:35,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:35,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:57:35,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:35,499 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 13:57:35,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833745769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:35,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:35,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 13:57:35,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083172356] [2021-06-05 13:57:35,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:57:35,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:35,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:57:35,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:57:35,499 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 13:57:35,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:35,724 INFO L93 Difference]: Finished difference Result 19073 states and 55761 transitions. [2021-06-05 13:57:35,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:57:35,724 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 13:57:35,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:35,750 INFO L225 Difference]: With dead ends: 19073 [2021-06-05 13:57:35,750 INFO L226 Difference]: Without dead ends: 19061 [2021-06-05 13:57:35,750 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 165.4ms TimeCoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:57:35,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19061 states. [2021-06-05 13:57:36,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19061 to 17743. [2021-06-05 13:57:36,028 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 13:57:36,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17743 states to 17743 states and 52628 transitions. [2021-06-05 13:57:36,060 INFO L78 Accepts]: Start accepts. Automaton has 17743 states and 52628 transitions. Word has length 23 [2021-06-05 13:57:36,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:36,061 INFO L482 AbstractCegarLoop]: Abstraction has 17743 states and 52628 transitions. [2021-06-05 13:57:36,061 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 13:57:36,061 INFO L276 IsEmpty]: Start isEmpty. Operand 17743 states and 52628 transitions. [2021-06-05 13:57:36,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:57:36,075 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:36,075 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:36,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3040 [2021-06-05 13:57:36,275 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:36,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:36,275 INFO L82 PathProgramCache]: Analyzing trace with hash -71954318, now seen corresponding path program 328 times [2021-06-05 13:57:36,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:36,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250185508] [2021-06-05 13:57:36,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:36,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:36,329 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 13:57:36,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:36,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250185508] [2021-06-05 13:57:36,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250185508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:36,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328907730] [2021-06-05 13:57:36,329 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 13:57:36,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:57:36,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:36,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:57:36,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:36,396 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 13:57:36,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328907730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:36,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:36,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 13:57:36,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529361984] [2021-06-05 13:57:36,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:57:36,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:36,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:57:36,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:57:36,397 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 13:57:36,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:36,518 INFO L93 Difference]: Finished difference Result 18066 states and 53107 transitions. [2021-06-05 13:57:36,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:57:36,518 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 13:57:36,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:36,543 INFO L225 Difference]: With dead ends: 18066 [2021-06-05 13:57:36,543 INFO L226 Difference]: Without dead ends: 18064 [2021-06-05 13:57:36,544 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 53.4ms TimeCoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:57:36,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18064 states. [2021-06-05 13:57:36,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18064 to 17735. [2021-06-05 13:57:36,798 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 13:57:36,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17735 states to 17735 states and 52601 transitions. [2021-06-05 13:57:36,835 INFO L78 Accepts]: Start accepts. Automaton has 17735 states and 52601 transitions. Word has length 23 [2021-06-05 13:57:36,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:36,835 INFO L482 AbstractCegarLoop]: Abstraction has 17735 states and 52601 transitions. [2021-06-05 13:57:36,835 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 13:57:36,835 INFO L276 IsEmpty]: Start isEmpty. Operand 17735 states and 52601 transitions. [2021-06-05 13:57:36,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:57:36,850 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:36,850 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:37,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3041 [2021-06-05 13:57:37,050 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:37,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:37,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1673500372, now seen corresponding path program 329 times [2021-06-05 13:57:37,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:37,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061828061] [2021-06-05 13:57:37,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:37,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:37,103 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 13:57:37,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:37,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061828061] [2021-06-05 13:57:37,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061828061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:37,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267430906] [2021-06-05 13:57:37,103 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 13:57:37,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 13:57:37,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:37,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:57:37,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:37,232 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 13:57:37,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267430906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:37,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:37,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-06-05 13:57:37,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664120125] [2021-06-05 13:57:37,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:57:37,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:37,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:57:37,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:57:37,233 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 13:57:37,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:37,348 INFO L93 Difference]: Finished difference Result 18041 states and 53023 transitions. [2021-06-05 13:57:37,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:57:37,349 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 13:57:37,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:37,372 INFO L225 Difference]: With dead ends: 18041 [2021-06-05 13:57:37,372 INFO L226 Difference]: Without dead ends: 18041 [2021-06-05 13:57:37,372 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 59.4ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:57:37,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18041 states. [2021-06-05 13:57:37,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18041 to 17719. [2021-06-05 13:57:37,608 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 13:57:37,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17719 states to 17719 states and 52539 transitions. [2021-06-05 13:57:37,646 INFO L78 Accepts]: Start accepts. Automaton has 17719 states and 52539 transitions. Word has length 23 [2021-06-05 13:57:37,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:37,646 INFO L482 AbstractCegarLoop]: Abstraction has 17719 states and 52539 transitions. [2021-06-05 13:57:37,646 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 13:57:37,646 INFO L276 IsEmpty]: Start isEmpty. Operand 17719 states and 52539 transitions. [2021-06-05 13:57:37,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:57:37,662 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:37,662 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:37,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3042 [2021-06-05 13:57:37,862 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:37,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:37,863 INFO L82 PathProgramCache]: Analyzing trace with hash -910853616, now seen corresponding path program 330 times [2021-06-05 13:57:37,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:37,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322745150] [2021-06-05 13:57:37,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:37,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:37,922 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 13:57:37,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:37,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322745150] [2021-06-05 13:57:37,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322745150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:37,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258181688] [2021-06-05 13:57:37,922 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 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 13:57:37,955 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 13:57:37,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:37,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:57:37,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:37,990 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 13:57:37,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258181688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:37,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:37,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:57:37,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121108117] [2021-06-05 13:57:37,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:57:37,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:37,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:57:37,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:57:37,991 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 13:57:38,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:38,178 INFO L93 Difference]: Finished difference Result 18030 states and 52973 transitions. [2021-06-05 13:57:38,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:57:38,178 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 13:57:38,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:38,202 INFO L225 Difference]: With dead ends: 18030 [2021-06-05 13:57:38,202 INFO L226 Difference]: Without dead ends: 18027 [2021-06-05 13:57:38,202 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 109.0ms TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:57:38,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18027 states. [2021-06-05 13:57:38,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18027 to 17710. [2021-06-05 13:57:38,436 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 13:57:38,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17710 states to 17710 states and 52489 transitions. [2021-06-05 13:57:38,468 INFO L78 Accepts]: Start accepts. Automaton has 17710 states and 52489 transitions. Word has length 23 [2021-06-05 13:57:38,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:38,468 INFO L482 AbstractCegarLoop]: Abstraction has 17710 states and 52489 transitions. [2021-06-05 13:57:38,468 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 13:57:38,468 INFO L276 IsEmpty]: Start isEmpty. Operand 17710 states and 52489 transitions. [2021-06-05 13:57:38,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:57:38,481 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:38,481 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:38,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3043 [2021-06-05 13:57:38,682 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:38,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:38,682 INFO L82 PathProgramCache]: Analyzing trace with hash 578551380, now seen corresponding path program 331 times [2021-06-05 13:57:38,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:38,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991449077] [2021-06-05 13:57:38,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:38,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:38,747 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 13:57:38,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:38,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991449077] [2021-06-05 13:57:38,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991449077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:38,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160239574] [2021-06-05 13:57:38,747 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 13:57:38,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:38,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:57:38,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:38,814 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 13:57:38,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160239574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:38,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:38,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-06-05 13:57:38,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159080683] [2021-06-05 13:57:38,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:57:38,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:38,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:57:38,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:57:38,815 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 13:57:39,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:39,017 INFO L93 Difference]: Finished difference Result 18025 states and 52930 transitions. [2021-06-05 13:57:39,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:57:39,018 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 13:57:39,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:39,041 INFO L225 Difference]: With dead ends: 18025 [2021-06-05 13:57:39,041 INFO L226 Difference]: Without dead ends: 18021 [2021-06-05 13:57:39,041 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 120.5ms TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:57:39,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18021 states. [2021-06-05 13:57:39,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18021 to 17710. [2021-06-05 13:57:39,279 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 13:57:39,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17710 states to 17710 states and 52465 transitions. [2021-06-05 13:57:39,420 INFO L78 Accepts]: Start accepts. Automaton has 17710 states and 52465 transitions. Word has length 23 [2021-06-05 13:57:39,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:39,420 INFO L482 AbstractCegarLoop]: Abstraction has 17710 states and 52465 transitions. [2021-06-05 13:57:39,420 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 13:57:39,420 INFO L276 IsEmpty]: Start isEmpty. Operand 17710 states and 52465 transitions. [2021-06-05 13:57:39,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:57:39,435 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:39,435 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:39,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3044 [2021-06-05 13:57:39,636 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:39,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:39,636 INFO L82 PathProgramCache]: Analyzing trace with hash -494534000, now seen corresponding path program 332 times [2021-06-05 13:57:39,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:39,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497268014] [2021-06-05 13:57:39,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:39,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:39,705 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 13:57:39,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:39,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497268014] [2021-06-05 13:57:39,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497268014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:39,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143613007] [2021-06-05 13:57:39,706 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 13:57:39,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:57:39,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:39,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:57:39,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:39,778 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 13:57:39,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143613007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:39,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:39,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-06-05 13:57:39,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334722398] [2021-06-05 13:57:39,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:57:39,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:39,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:57:39,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:57:39,779 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 13:57:39,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:39,970 INFO L93 Difference]: Finished difference Result 20107 states and 58655 transitions. [2021-06-05 13:57:39,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:57:39,971 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 13:57:39,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:39,997 INFO L225 Difference]: With dead ends: 20107 [2021-06-05 13:57:39,997 INFO L226 Difference]: Without dead ends: 20101 [2021-06-05 13:57:39,997 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 123.4ms TimeCoverageRelationStatistics Valid=197, Invalid=403, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:57:40,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20101 states. [2021-06-05 13:57:40,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20101 to 17710. [2021-06-05 13:57:40,233 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 13:57:40,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17710 states to 17710 states and 52458 transitions. [2021-06-05 13:57:40,264 INFO L78 Accepts]: Start accepts. Automaton has 17710 states and 52458 transitions. Word has length 23 [2021-06-05 13:57:40,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:40,264 INFO L482 AbstractCegarLoop]: Abstraction has 17710 states and 52458 transitions. [2021-06-05 13:57:40,264 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 13:57:40,264 INFO L276 IsEmpty]: Start isEmpty. Operand 17710 states and 52458 transitions. [2021-06-05 13:57:40,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:57:40,278 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:40,278 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:40,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 334 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3045 [2021-06-05 13:57:40,479 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:40,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:40,479 INFO L82 PathProgramCache]: Analyzing trace with hash 599557588, now seen corresponding path program 333 times [2021-06-05 13:57:40,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:40,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765667086] [2021-06-05 13:57:40,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:40,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:40,554 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 13:57:40,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:40,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765667086] [2021-06-05 13:57:40,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765667086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:40,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824488284] [2021-06-05 13:57:40,555 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 13:57:40,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:57:40,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:40,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:57:40,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:40,620 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 13:57:40,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824488284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:40,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:40,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 13:57:40,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714172190] [2021-06-05 13:57:40,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:57:40,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:40,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:57:40,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:57:40,621 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 13:57:40,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:40,839 INFO L93 Difference]: Finished difference Result 20128 states and 58673 transitions. [2021-06-05 13:57:40,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:57:40,839 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 13:57:40,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:40,865 INFO L225 Difference]: With dead ends: 20128 [2021-06-05 13:57:40,865 INFO L226 Difference]: Without dead ends: 20120 [2021-06-05 13:57:40,866 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 140.0ms TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:57:40,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20120 states. [2021-06-05 13:57:41,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20120 to 17811. [2021-06-05 13:57:41,104 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 13:57:41,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17811 states to 17811 states and 52775 transitions. [2021-06-05 13:57:41,136 INFO L78 Accepts]: Start accepts. Automaton has 17811 states and 52775 transitions. Word has length 23 [2021-06-05 13:57:41,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:41,136 INFO L482 AbstractCegarLoop]: Abstraction has 17811 states and 52775 transitions. [2021-06-05 13:57:41,136 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 13:57:41,136 INFO L276 IsEmpty]: Start isEmpty. Operand 17811 states and 52775 transitions. [2021-06-05 13:57:41,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:57:41,150 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:41,150 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:41,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3046,335 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:41,351 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:41,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:41,351 INFO L82 PathProgramCache]: Analyzing trace with hash 156658448, now seen corresponding path program 334 times [2021-06-05 13:57:41,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:41,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050753265] [2021-06-05 13:57:41,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:41,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:41,430 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 13:57:41,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:41,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050753265] [2021-06-05 13:57:41,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050753265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:41,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76043103] [2021-06-05 13:57:41,431 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 13:57:41,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:57:41,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:41,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:57:41,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:41,490 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 13:57:41,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76043103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:41,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:41,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-06-05 13:57:41,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742561233] [2021-06-05 13:57:41,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:57:41,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:41,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:57:41,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:57:41,491 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 13:57:41,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:41,711 INFO L93 Difference]: Finished difference Result 19877 states and 57902 transitions. [2021-06-05 13:57:41,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:57:41,712 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 13:57:41,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:41,736 INFO L225 Difference]: With dead ends: 19877 [2021-06-05 13:57:41,736 INFO L226 Difference]: Without dead ends: 19867 [2021-06-05 13:57:41,736 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 162.1ms TimeCoverageRelationStatistics Valid=259, Invalid=553, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:57:41,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19867 states. [2021-06-05 13:57:41,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19867 to 17811. [2021-06-05 13:57:41,963 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 13:57:41,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17811 states to 17811 states and 52772 transitions. [2021-06-05 13:57:41,999 INFO L78 Accepts]: Start accepts. Automaton has 17811 states and 52772 transitions. Word has length 23 [2021-06-05 13:57:41,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:41,999 INFO L482 AbstractCegarLoop]: Abstraction has 17811 states and 52772 transitions. [2021-06-05 13:57:41,999 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 13:57:41,999 INFO L276 IsEmpty]: Start isEmpty. Operand 17811 states and 52772 transitions. [2021-06-05 13:57:42,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:57:42,016 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:42,016 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:42,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3047,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:42,216 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:42,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:42,216 INFO L82 PathProgramCache]: Analyzing trace with hash -688313004, now seen corresponding path program 335 times [2021-06-05 13:57:42,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:42,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378423653] [2021-06-05 13:57:42,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:42,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:42,313 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 13:57:42,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:42,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378423653] [2021-06-05 13:57:42,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378423653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:42,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441417795] [2021-06-05 13:57:42,313 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 13:57:42,341 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:57:42,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:42,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:57:42,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:42,377 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 13:57:42,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441417795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:42,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:42,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 13:57:42,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88402992] [2021-06-05 13:57:42,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:57:42,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:42,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:57:42,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:57:42,378 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 13:57:42,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:42,625 INFO L93 Difference]: Finished difference Result 19900 states and 57925 transitions. [2021-06-05 13:57:42,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 13:57:42,625 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 13:57:42,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:42,651 INFO L225 Difference]: With dead ends: 19900 [2021-06-05 13:57:42,651 INFO L226 Difference]: Without dead ends: 19888 [2021-06-05 13:57:42,652 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 190.6ms TimeCoverageRelationStatistics Valid=297, Invalid=633, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:57:42,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19888 states. [2021-06-05 13:57:42,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19888 to 17820. [2021-06-05 13:57:42,962 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 13:57:42,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17820 states to 17820 states and 52796 transitions. [2021-06-05 13:57:42,994 INFO L78 Accepts]: Start accepts. Automaton has 17820 states and 52796 transitions. Word has length 23 [2021-06-05 13:57:42,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:42,994 INFO L482 AbstractCegarLoop]: Abstraction has 17820 states and 52796 transitions. [2021-06-05 13:57:42,995 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 13:57:42,995 INFO L276 IsEmpty]: Start isEmpty. Operand 17820 states and 52796 transitions. [2021-06-05 13:57:43,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:57:43,008 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:43,008 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:43,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3048,337 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:43,208 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:43,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:43,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1112624240, now seen corresponding path program 336 times [2021-06-05 13:57:43,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:43,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008600315] [2021-06-05 13:57:43,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:43,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:43,302 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 13:57:43,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:43,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008600315] [2021-06-05 13:57:43,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008600315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:43,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125551856] [2021-06-05 13:57:43,302 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 13:57:43,329 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:57:43,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:43,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:57:43,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:43,365 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 13:57:43,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125551856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:43,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:43,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 13:57:43,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789623056] [2021-06-05 13:57:43,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:57:43,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:43,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:57:43,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:57:43,366 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 13:57:43,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:43,680 INFO L93 Difference]: Finished difference Result 18844 states and 55132 transitions. [2021-06-05 13:57:43,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 13:57:43,681 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 13:57:43,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:43,705 INFO L225 Difference]: With dead ends: 18844 [2021-06-05 13:57:43,705 INFO L226 Difference]: Without dead ends: 18830 [2021-06-05 13:57:43,705 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 234.5ms TimeCoverageRelationStatistics Valid=384, Invalid=806, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 13:57:43,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18830 states. [2021-06-05 13:57:43,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18830 to 17820. [2021-06-05 13:57:43,919 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 13:57:43,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17820 states to 17820 states and 52794 transitions. [2021-06-05 13:57:43,952 INFO L78 Accepts]: Start accepts. Automaton has 17820 states and 52794 transitions. Word has length 23 [2021-06-05 13:57:43,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:43,953 INFO L482 AbstractCegarLoop]: Abstraction has 17820 states and 52794 transitions. [2021-06-05 13:57:43,953 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 13:57:43,953 INFO L276 IsEmpty]: Start isEmpty. Operand 17820 states and 52794 transitions. [2021-06-05 13:57:43,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:57:43,966 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:43,966 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:44,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3049 [2021-06-05 13:57:44,167 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:44,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:44,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1769822746, now seen corresponding path program 337 times [2021-06-05 13:57:44,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:44,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373223732] [2021-06-05 13:57:44,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:44,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:44,242 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 13:57:44,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:44,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373223732] [2021-06-05 13:57:44,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373223732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:44,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323411365] [2021-06-05 13:57:44,243 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 13:57:44,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:44,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:57:44,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:44,309 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 13:57:44,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323411365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:44,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:44,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 13:57:44,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555158915] [2021-06-05 13:57:44,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:57:44,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:44,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:57:44,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:57:44,310 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 13:57:44,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:44,500 INFO L93 Difference]: Finished difference Result 17961 states and 52999 transitions. [2021-06-05 13:57:44,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:57:44,501 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 13:57:44,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:44,523 INFO L225 Difference]: With dead ends: 17961 [2021-06-05 13:57:44,523 INFO L226 Difference]: Without dead ends: 17955 [2021-06-05 13:57:44,524 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 135.3ms TimeCoverageRelationStatistics Valid=223, Invalid=427, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:57:44,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17955 states. [2021-06-05 13:57:44,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17955 to 17760. [2021-06-05 13:57:44,736 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 13:57:44,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17760 states to 17760 states and 52605 transitions. [2021-06-05 13:57:44,769 INFO L78 Accepts]: Start accepts. Automaton has 17760 states and 52605 transitions. Word has length 23 [2021-06-05 13:57:44,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:44,769 INFO L482 AbstractCegarLoop]: Abstraction has 17760 states and 52605 transitions. [2021-06-05 13:57:44,769 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 13:57:44,769 INFO L276 IsEmpty]: Start isEmpty. Operand 17760 states and 52605 transitions. [2021-06-05 13:57:44,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:57:44,784 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:44,784 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:44,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3050 [2021-06-05 13:57:44,984 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:44,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:44,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1074657958, now seen corresponding path program 338 times [2021-06-05 13:57:44,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:44,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471150347] [2021-06-05 13:57:44,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:44,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:45,073 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 13:57:45,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:45,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471150347] [2021-06-05 13:57:45,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471150347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:45,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053767424] [2021-06-05 13:57:45,073 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 13:57:45,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:57:45,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:45,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:57:45,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:45,134 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 13:57:45,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053767424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:45,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:45,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-06-05 13:57:45,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992578539] [2021-06-05 13:57:45,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:57:45,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:45,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:57:45,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:57:45,135 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 13:57:45,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:45,367 INFO L93 Difference]: Finished difference Result 18138 states and 53420 transitions. [2021-06-05 13:57:45,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:57:45,368 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 13:57:45,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:45,392 INFO L225 Difference]: With dead ends: 18138 [2021-06-05 13:57:45,392 INFO L226 Difference]: Without dead ends: 18126 [2021-06-05 13:57:45,392 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 164.9ms TimeCoverageRelationStatistics Valid=259, Invalid=553, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:57:45,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18126 states. [2021-06-05 13:57:45,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18126 to 17755. [2021-06-05 13:57:45,615 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 13:57:45,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17755 states to 17755 states and 52576 transitions. [2021-06-05 13:57:45,648 INFO L78 Accepts]: Start accepts. Automaton has 17755 states and 52576 transitions. Word has length 23 [2021-06-05 13:57:45,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:45,648 INFO L482 AbstractCegarLoop]: Abstraction has 17755 states and 52576 transitions. [2021-06-05 13:57:45,648 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 13:57:45,648 INFO L276 IsEmpty]: Start isEmpty. Operand 17755 states and 52576 transitions. [2021-06-05 13:57:45,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:57:45,662 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:45,662 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:45,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3051 [2021-06-05 13:57:45,863 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:45,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:45,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1282166328, now seen corresponding path program 339 times [2021-06-05 13:57:45,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:45,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995318723] [2021-06-05 13:57:45,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:45,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:45,932 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 13:57:45,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:45,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995318723] [2021-06-05 13:57:45,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995318723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:45,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496758592] [2021-06-05 13:57:45,933 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 13:57:45,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:57:45,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:45,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:57:45,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:45,997 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 13:57:45,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496758592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:45,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:45,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 13:57:45,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318867292] [2021-06-05 13:57:45,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:57:45,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:45,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:57:45,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:57:45,998 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 13:57:46,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:46,180 INFO L93 Difference]: Finished difference Result 18122 states and 53190 transitions. [2021-06-05 13:57:46,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:57:46,180 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 13:57:46,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:46,207 INFO L225 Difference]: With dead ends: 18122 [2021-06-05 13:57:46,207 INFO L226 Difference]: Without dead ends: 18113 [2021-06-05 13:57:46,207 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 119.3ms TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:57:46,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18113 states. [2021-06-05 13:57:46,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18113 to 17738. [2021-06-05 13:57:46,429 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 13:57:46,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17738 states to 17738 states and 52504 transitions. [2021-06-05 13:57:46,570 INFO L78 Accepts]: Start accepts. Automaton has 17738 states and 52504 transitions. Word has length 23 [2021-06-05 13:57:46,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:46,570 INFO L482 AbstractCegarLoop]: Abstraction has 17738 states and 52504 transitions. [2021-06-05 13:57:46,571 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 13:57:46,571 INFO L276 IsEmpty]: Start isEmpty. Operand 17738 states and 52504 transitions. [2021-06-05 13:57:46,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:57:46,583 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:46,583 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:46,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3052 [2021-06-05 13:57:46,784 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:46,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:46,784 INFO L82 PathProgramCache]: Analyzing trace with hash -188074740, now seen corresponding path program 340 times [2021-06-05 13:57:46,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:46,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510401854] [2021-06-05 13:57:46,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:46,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:46,856 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 13:57:46,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:46,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510401854] [2021-06-05 13:57:46,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510401854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:46,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470433724] [2021-06-05 13:57:46,857 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 13:57:46,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:57:46,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:46,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:57:46,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:46,926 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 13:57:46,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470433724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:46,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:46,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-06-05 13:57:46,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462180559] [2021-06-05 13:57:46,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:57:46,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:46,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:57:46,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:57:46,927 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 13:57:47,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:47,138 INFO L93 Difference]: Finished difference Result 18117 states and 53136 transitions. [2021-06-05 13:57:47,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:57:47,139 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 13:57:47,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:47,167 INFO L225 Difference]: With dead ends: 18117 [2021-06-05 13:57:47,168 INFO L226 Difference]: Without dead ends: 18109 [2021-06-05 13:57:47,168 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 136.3ms TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:57:47,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18109 states. [2021-06-05 13:57:47,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18109 to 17756. [2021-06-05 13:57:47,423 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 13:57:47,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17756 states to 17756 states and 52535 transitions. [2021-06-05 13:57:47,461 INFO L78 Accepts]: Start accepts. Automaton has 17756 states and 52535 transitions. Word has length 23 [2021-06-05 13:57:47,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:47,461 INFO L482 AbstractCegarLoop]: Abstraction has 17756 states and 52535 transitions. [2021-06-05 13:57:47,461 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 13:57:47,461 INFO L276 IsEmpty]: Start isEmpty. Operand 17756 states and 52535 transitions. [2021-06-05 13:57:47,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:57:47,477 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:47,477 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:47,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3053,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:47,677 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:47,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:47,677 INFO L82 PathProgramCache]: Analyzing trace with hash -630973880, now seen corresponding path program 341 times [2021-06-05 13:57:47,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:47,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828088944] [2021-06-05 13:57:47,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:47,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:47,758 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 13:57:47,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:47,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828088944] [2021-06-05 13:57:47,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828088944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:47,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468215113] [2021-06-05 13:57:47,758 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 13:57:47,785 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:57:47,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:47,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:57:47,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:47,820 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 13:57:47,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468215113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:47,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:47,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-06-05 13:57:47,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996967309] [2021-06-05 13:57:47,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:57:47,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:47,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:57:47,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:57:47,821 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 13:57:48,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:48,060 INFO L93 Difference]: Finished difference Result 19811 states and 57453 transitions. [2021-06-05 13:57:48,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:57:48,061 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 13:57:48,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:48,087 INFO L225 Difference]: With dead ends: 19811 [2021-06-05 13:57:48,087 INFO L226 Difference]: Without dead ends: 19801 [2021-06-05 13:57:48,087 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 160.2ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:57:48,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19801 states. [2021-06-05 13:57:48,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19801 to 17805. [2021-06-05 13:57:48,324 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 13:57:48,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17805 states to 17805 states and 52668 transitions. [2021-06-05 13:57:48,361 INFO L78 Accepts]: Start accepts. Automaton has 17805 states and 52668 transitions. Word has length 23 [2021-06-05 13:57:48,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:48,361 INFO L482 AbstractCegarLoop]: Abstraction has 17805 states and 52668 transitions. [2021-06-05 13:57:48,361 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 13:57:48,361 INFO L276 IsEmpty]: Start isEmpty. Operand 17805 states and 52668 transitions. [2021-06-05 13:57:48,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:57:48,379 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:48,379 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:48,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3054 [2021-06-05 13:57:48,581 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:48,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:48,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1475945332, now seen corresponding path program 342 times [2021-06-05 13:57:48,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:48,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533674035] [2021-06-05 13:57:48,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:48,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:48,666 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 13:57:48,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:48,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533674035] [2021-06-05 13:57:48,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533674035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:48,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234051316] [2021-06-05 13:57:48,667 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 13:57:48,693 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:57:48,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:48,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:57:48,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:48,730 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 13:57:48,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234051316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:48,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:48,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 13:57:48,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882449483] [2021-06-05 13:57:48,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:57:48,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:48,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:57:48,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:57:48,731 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 13:57:48,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:48,977 INFO L93 Difference]: Finished difference Result 19831 states and 57467 transitions. [2021-06-05 13:57:48,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 13:57:48,977 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 13:57:48,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:49,003 INFO L225 Difference]: With dead ends: 19831 [2021-06-05 13:57:49,003 INFO L226 Difference]: Without dead ends: 19819 [2021-06-05 13:57:49,004 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 178.3ms TimeCoverageRelationStatistics Valid=298, Invalid=632, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:57:49,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19819 states. [2021-06-05 13:57:49,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19819 to 17849. [2021-06-05 13:57:49,247 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 13:57:49,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17849 states to 17849 states and 52786 transitions. [2021-06-05 13:57:49,285 INFO L78 Accepts]: Start accepts. Automaton has 17849 states and 52786 transitions. Word has length 23 [2021-06-05 13:57:49,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:49,285 INFO L482 AbstractCegarLoop]: Abstraction has 17849 states and 52786 transitions. [2021-06-05 13:57:49,285 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 13:57:49,286 INFO L276 IsEmpty]: Start isEmpty. Operand 17849 states and 52786 transitions. [2021-06-05 13:57:49,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:57:49,302 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:49,302 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:49,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3055,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:49,502 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:49,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:49,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1900256568, now seen corresponding path program 343 times [2021-06-05 13:57:49,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:49,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830473197] [2021-06-05 13:57:49,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:49,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:49,592 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 13:57:49,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:49,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830473197] [2021-06-05 13:57:49,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830473197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:49,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785233074] [2021-06-05 13:57:49,593 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 13:57:49,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:49,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:57:49,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:49,652 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 13:57:49,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785233074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:49,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:49,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-06-05 13:57:49,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407530698] [2021-06-05 13:57:49,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:57:49,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:49,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:57:49,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:57:49,653 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 13:57:49,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:49,946 INFO L93 Difference]: Finished difference Result 19267 states and 56030 transitions. [2021-06-05 13:57:49,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 13:57:49,946 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 13:57:49,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:49,971 INFO L225 Difference]: With dead ends: 19267 [2021-06-05 13:57:49,971 INFO L226 Difference]: Without dead ends: 19253 [2021-06-05 13:57:49,972 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 228.3ms TimeCoverageRelationStatistics Valid=385, Invalid=805, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 13:57:49,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19253 states. [2021-06-05 13:57:50,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19253 to 17849. [2021-06-05 13:57:50,280 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 13:57:50,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17849 states to 17849 states and 52781 transitions. [2021-06-05 13:57:50,311 INFO L78 Accepts]: Start accepts. Automaton has 17849 states and 52781 transitions. Word has length 23 [2021-06-05 13:57:50,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:50,311 INFO L482 AbstractCegarLoop]: Abstraction has 17849 states and 52781 transitions. [2021-06-05 13:57:50,311 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 13:57:50,311 INFO L276 IsEmpty]: Start isEmpty. Operand 17849 states and 52781 transitions. [2021-06-05 13:57:50,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:57:50,325 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:50,325 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:50,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3056 [2021-06-05 13:57:50,526 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:50,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:50,526 INFO L82 PathProgramCache]: Analyzing trace with hash -2144238716, now seen corresponding path program 344 times [2021-06-05 13:57:50,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:50,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729124733] [2021-06-05 13:57:50,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:50,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:50,590 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 13:57:50,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:50,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729124733] [2021-06-05 13:57:50,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729124733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:50,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903904915] [2021-06-05 13:57:50,591 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 13:57:50,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:57:50,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:50,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:57:50,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:50,658 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 13:57:50,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903904915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:50,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:50,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 13:57:50,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170285325] [2021-06-05 13:57:50,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:57:50,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:50,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:57:50,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:57:50,659 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 13:57:50,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:50,817 INFO L93 Difference]: Finished difference Result 18130 states and 53192 transitions. [2021-06-05 13:57:50,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:57:50,818 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 13:57:50,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:50,840 INFO L225 Difference]: With dead ends: 18130 [2021-06-05 13:57:50,841 INFO L226 Difference]: Without dead ends: 18126 [2021-06-05 13:57:50,841 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 100.1ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:57:50,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18126 states. [2021-06-05 13:57:51,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18126 to 17787. [2021-06-05 13:57:51,056 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 13:57:51,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17787 states to 17787 states and 52579 transitions. [2021-06-05 13:57:51,089 INFO L78 Accepts]: Start accepts. Automaton has 17787 states and 52579 transitions. Word has length 23 [2021-06-05 13:57:51,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:51,089 INFO L482 AbstractCegarLoop]: Abstraction has 17787 states and 52579 transitions. [2021-06-05 13:57:51,089 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 13:57:51,089 INFO L276 IsEmpty]: Start isEmpty. Operand 17787 states and 52579 transitions. [2021-06-05 13:57:51,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:57:51,104 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:51,104 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:51,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3057,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:51,304 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:51,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:51,305 INFO L82 PathProgramCache]: Analyzing trace with hash 907814562, now seen corresponding path program 345 times [2021-06-05 13:57:51,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:51,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685891628] [2021-06-05 13:57:51,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:51,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:51,381 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 13:57:51,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:51,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685891628] [2021-06-05 13:57:51,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685891628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:51,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961715025] [2021-06-05 13:57:51,382 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 13:57:51,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:57:51,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:51,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:57:51,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:51,449 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 13:57:51,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961715025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:51,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:51,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 13:57:51,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578079179] [2021-06-05 13:57:51,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:57:51,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:51,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:57:51,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:57:51,450 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 13:57:51,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:51,666 INFO L93 Difference]: Finished difference Result 18203 states and 53300 transitions. [2021-06-05 13:57:51,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:57:51,667 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 13:57:51,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:51,690 INFO L225 Difference]: With dead ends: 18203 [2021-06-05 13:57:51,690 INFO L226 Difference]: Without dead ends: 18188 [2021-06-05 13:57:51,690 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 154.5ms TimeCoverageRelationStatistics Valid=261, Invalid=551, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:57:51,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18188 states. [2021-06-05 13:57:51,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18188 to 17734. [2021-06-05 13:57:51,920 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 13:57:51,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17734 states to 17734 states and 52389 transitions. [2021-06-05 13:57:51,948 INFO L78 Accepts]: Start accepts. Automaton has 17734 states and 52389 transitions. Word has length 23 [2021-06-05 13:57:51,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:51,948 INFO L482 AbstractCegarLoop]: Abstraction has 17734 states and 52389 transitions. [2021-06-05 13:57:51,948 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 13:57:51,948 INFO L276 IsEmpty]: Start isEmpty. Operand 17734 states and 52389 transitions. [2021-06-05 13:57:51,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:57:51,961 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:51,961 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:52,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3058,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:52,162 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:52,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:52,162 INFO L82 PathProgramCache]: Analyzing trace with hash 62843110, now seen corresponding path program 346 times [2021-06-05 13:57:52,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:52,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947264840] [2021-06-05 13:57:52,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:52,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:52,250 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 13:57:52,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:52,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947264840] [2021-06-05 13:57:52,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947264840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:52,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444854314] [2021-06-05 13:57:52,250 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 13:57:52,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:57:52,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:52,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:57:52,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:52,316 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 13:57:52,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444854314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:52,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:52,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2021-06-05 13:57:52,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270203659] [2021-06-05 13:57:52,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:57:52,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:52,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:57:52,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:57:52,317 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 13:57:52,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:52,553 INFO L93 Difference]: Finished difference Result 18155 states and 53119 transitions. [2021-06-05 13:57:52,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 13:57:52,553 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 13:57:52,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:52,580 INFO L225 Difference]: With dead ends: 18155 [2021-06-05 13:57:52,580 INFO L226 Difference]: Without dead ends: 18143 [2021-06-05 13:57:52,580 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 175.3ms TimeCoverageRelationStatistics Valid=297, Invalid=633, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:57:52,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18143 states. [2021-06-05 13:57:52,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18143 to 17705. [2021-06-05 13:57:52,825 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 13:57:52,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17705 states to 17705 states and 52274 transitions. [2021-06-05 13:57:52,862 INFO L78 Accepts]: Start accepts. Automaton has 17705 states and 52274 transitions. Word has length 23 [2021-06-05 13:57:52,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:52,862 INFO L482 AbstractCegarLoop]: Abstraction has 17705 states and 52274 transitions. [2021-06-05 13:57:52,862 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 13:57:52,863 INFO L276 IsEmpty]: Start isEmpty. Operand 17705 states and 52274 transitions. [2021-06-05 13:57:52,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:57:52,878 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:52,878 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:53,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3059,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:53,078 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:53,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:53,079 INFO L82 PathProgramCache]: Analyzing trace with hash -361468126, now seen corresponding path program 347 times [2021-06-05 13:57:53,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:53,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072291359] [2021-06-05 13:57:53,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:53,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:53,169 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 13:57:53,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:53,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072291359] [2021-06-05 13:57:53,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072291359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:53,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152079820] [2021-06-05 13:57:53,170 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 13:57:53,195 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:57:53,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:53,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:57:53,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:53,237 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 13:57:53,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152079820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:53,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:53,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 13:57:53,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837622376] [2021-06-05 13:57:53,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:57:53,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:53,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:57:53,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:57:53,238 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 13:57:53,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:53,520 INFO L93 Difference]: Finished difference Result 18640 states and 54430 transitions. [2021-06-05 13:57:53,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 13:57:53,521 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 13:57:53,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:53,544 INFO L225 Difference]: With dead ends: 18640 [2021-06-05 13:57:53,544 INFO L226 Difference]: Without dead ends: 18626 [2021-06-05 13:57:53,544 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 224.1ms TimeCoverageRelationStatistics Valid=378, Invalid=812, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 13:57:53,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18626 states. [2021-06-05 13:57:53,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18626 to 17706. [2021-06-05 13:57:53,852 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 13:57:53,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17706 states to 17706 states and 52269 transitions. [2021-06-05 13:57:53,889 INFO L78 Accepts]: Start accepts. Automaton has 17706 states and 52269 transitions. Word has length 23 [2021-06-05 13:57:53,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:53,889 INFO L482 AbstractCegarLoop]: Abstraction has 17706 states and 52269 transitions. [2021-06-05 13:57:53,889 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 13:57:53,889 INFO L276 IsEmpty]: Start isEmpty. Operand 17706 states and 52269 transitions. [2021-06-05 13:57:53,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:57:53,903 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:53,903 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:54,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3060,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:54,104 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:54,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:54,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1602127322, now seen corresponding path program 348 times [2021-06-05 13:57:54,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:54,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466513944] [2021-06-05 13:57:54,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:54,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:54,174 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 13:57:54,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:54,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466513944] [2021-06-05 13:57:54,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466513944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:54,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967067563] [2021-06-05 13:57:54,175 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 13:57:54,208 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:57:54,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:54,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:57:54,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:54,253 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 13:57:54,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967067563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:54,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:54,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:57:54,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807246431] [2021-06-05 13:57:54,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:57:54,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:54,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:57:54,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:57:54,254 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 13:57:54,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:54,394 INFO L93 Difference]: Finished difference Result 18069 states and 52830 transitions. [2021-06-05 13:57:54,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:57:54,394 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 13:57:54,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:54,419 INFO L225 Difference]: With dead ends: 18069 [2021-06-05 13:57:54,419 INFO L226 Difference]: Without dead ends: 18069 [2021-06-05 13:57:54,420 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 84.4ms TimeCoverageRelationStatistics Valid=120, Invalid=186, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:57:54,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18069 states. [2021-06-05 13:57:54,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18069 to 17709. [2021-06-05 13:57:54,702 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 13:57:54,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17709 states to 17709 states and 52278 transitions. [2021-06-05 13:57:54,742 INFO L78 Accepts]: Start accepts. Automaton has 17709 states and 52278 transitions. Word has length 23 [2021-06-05 13:57:54,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:54,742 INFO L482 AbstractCegarLoop]: Abstraction has 17709 states and 52278 transitions. [2021-06-05 13:57:54,742 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 13:57:54,743 INFO L276 IsEmpty]: Start isEmpty. Operand 17709 states and 52278 transitions. [2021-06-05 13:57:54,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:57:54,762 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:54,762 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:54,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3061 [2021-06-05 13:57:54,962 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:54,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:54,963 INFO L82 PathProgramCache]: Analyzing trace with hash 935096200, now seen corresponding path program 349 times [2021-06-05 13:57:54,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:54,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672033343] [2021-06-05 13:57:54,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:54,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:55,067 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 13:57:55,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:55,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672033343] [2021-06-05 13:57:55,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672033343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:55,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741629781] [2021-06-05 13:57:55,068 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 13:57:55,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:55,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:57:55,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:55,142 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 13:57:55,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741629781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:55,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:55,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2021-06-05 13:57:55,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009404459] [2021-06-05 13:57:55,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:57:55,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:55,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:57:55,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:57:55,143 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 13:57:55,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:55,418 INFO L93 Difference]: Finished difference Result 19393 states and 56292 transitions. [2021-06-05 13:57:55,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 13:57:55,419 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 13:57:55,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:55,443 INFO L225 Difference]: With dead ends: 19393 [2021-06-05 13:57:55,443 INFO L226 Difference]: Without dead ends: 19379 [2021-06-05 13:57:55,443 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 211.7ms TimeCoverageRelationStatistics Valid=318, Invalid=674, Unknown=0, NotChecked=0, Total=992 [2021-06-05 13:57:55,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19379 states. [2021-06-05 13:57:55,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19379 to 17740. [2021-06-05 13:57:55,662 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 13:57:55,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17740 states to 17740 states and 52346 transitions. [2021-06-05 13:57:55,693 INFO L78 Accepts]: Start accepts. Automaton has 17740 states and 52346 transitions. Word has length 23 [2021-06-05 13:57:55,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:55,693 INFO L482 AbstractCegarLoop]: Abstraction has 17740 states and 52346 transitions. [2021-06-05 13:57:55,693 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 13:57:55,693 INFO L276 IsEmpty]: Start isEmpty. Operand 17740 states and 52346 transitions. [2021-06-05 13:57:55,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:57:55,707 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:55,707 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:55,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3062 [2021-06-05 13:57:55,908 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:55,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:55,908 INFO L82 PathProgramCache]: Analyzing trace with hash 216475460, now seen corresponding path program 350 times [2021-06-05 13:57:55,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:55,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384818519] [2021-06-05 13:57:55,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:55,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:55,970 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 13:57:55,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:55,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384818519] [2021-06-05 13:57:55,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384818519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:55,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065764042] [2021-06-05 13:57:55,970 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 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 13:57:56,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:57:56,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:56,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:57:56,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:56,062 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 13:57:56,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065764042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:56,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:56,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-06-05 13:57:56,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342348075] [2021-06-05 13:57:56,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:57:56,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:56,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:57:56,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:57:56,063 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 13:57:56,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:56,186 INFO L93 Difference]: Finished difference Result 18165 states and 52994 transitions. [2021-06-05 13:57:56,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:57:56,187 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 13:57:56,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:56,210 INFO L225 Difference]: With dead ends: 18165 [2021-06-05 13:57:56,210 INFO L226 Difference]: Without dead ends: 18165 [2021-06-05 13:57:56,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 67.3ms TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:57:56,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18165 states. [2021-06-05 13:57:56,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18165 to 17749. [2021-06-05 13:57:56,441 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 13:57:56,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17749 states to 17749 states and 52379 transitions. [2021-06-05 13:57:56,473 INFO L78 Accepts]: Start accepts. Automaton has 17749 states and 52379 transitions. Word has length 23 [2021-06-05 13:57:56,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:56,473 INFO L482 AbstractCegarLoop]: Abstraction has 17749 states and 52379 transitions. [2021-06-05 13:57:56,473 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 13:57:56,473 INFO L276 IsEmpty]: Start isEmpty. Operand 17749 states and 52379 transitions. [2021-06-05 13:57:56,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:57:56,488 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:56,488 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:56,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3063,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:56,688 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:56,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:56,689 INFO L82 PathProgramCache]: Analyzing trace with hash -622423838, now seen corresponding path program 351 times [2021-06-05 13:57:56,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:56,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362725184] [2021-06-05 13:57:56,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:56,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:56,746 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 13:57:56,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:56,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362725184] [2021-06-05 13:57:56,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362725184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:56,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54698852] [2021-06-05 13:57:56,747 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 13:57:56,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:57:56,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:56,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:57:56,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:56,808 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 13:57:56,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54698852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:56,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:56,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 13:57:56,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046443915] [2021-06-05 13:57:56,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:57:56,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:56,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:57:56,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:57:56,808 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 13:57:56,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:56,989 INFO L93 Difference]: Finished difference Result 18087 states and 52839 transitions. [2021-06-05 13:57:56,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 13:57:56,989 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 13:57:56,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:57,012 INFO L225 Difference]: With dead ends: 18087 [2021-06-05 13:57:57,012 INFO L226 Difference]: Without dead ends: 18085 [2021-06-05 13:57:57,012 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 107.3ms TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:57:57,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18085 states. [2021-06-05 13:57:57,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18085 to 17749. [2021-06-05 13:57:57,265 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 13:57:57,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17749 states to 17749 states and 52373 transitions. [2021-06-05 13:57:57,303 INFO L78 Accepts]: Start accepts. Automaton has 17749 states and 52373 transitions. Word has length 23 [2021-06-05 13:57:57,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:57,303 INFO L482 AbstractCegarLoop]: Abstraction has 17749 states and 52373 transitions. [2021-06-05 13:57:57,303 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 13:57:57,303 INFO L276 IsEmpty]: Start isEmpty. Operand 17749 states and 52373 transitions. [2021-06-05 13:57:57,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:57:57,317 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:57,317 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:57,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3064 [2021-06-05 13:57:57,518 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:57,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:57,518 INFO L82 PathProgramCache]: Analyzing trace with hash 866981158, now seen corresponding path program 352 times [2021-06-05 13:57:57,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:57,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103088347] [2021-06-05 13:57:57,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:57,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:57,580 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 13:57:57,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:57,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103088347] [2021-06-05 13:57:57,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103088347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:57,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172814954] [2021-06-05 13:57:57,581 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 13:57:57,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:57:57,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:57,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:57:57,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:57,645 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 13:57:57,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172814954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:57,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:57,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-06-05 13:57:57,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344352480] [2021-06-05 13:57:57,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:57:57,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:57,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:57:57,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:57:57,646 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 13:57:57,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:57,855 INFO L93 Difference]: Finished difference Result 18093 states and 52841 transitions. [2021-06-05 13:57:57,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 13:57:57,855 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 13:57:57,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:57,881 INFO L225 Difference]: With dead ends: 18093 [2021-06-05 13:57:57,881 INFO L226 Difference]: Without dead ends: 18089 [2021-06-05 13:57:57,881 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 123.6ms TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:57:57,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18089 states. [2021-06-05 13:57:58,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18089 to 17749. [2021-06-05 13:57:58,227 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 13:57:58,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17749 states to 17749 states and 52355 transitions. [2021-06-05 13:57:58,262 INFO L78 Accepts]: Start accepts. Automaton has 17749 states and 52355 transitions. Word has length 23 [2021-06-05 13:57:58,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:58,262 INFO L482 AbstractCegarLoop]: Abstraction has 17749 states and 52355 transitions. [2021-06-05 13:57:58,262 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 13:57:58,262 INFO L276 IsEmpty]: Start isEmpty. Operand 17749 states and 52355 transitions. [2021-06-05 13:57:58,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:57:58,277 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:58,277 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:58,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3065,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:58,477 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:58,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:58,477 INFO L82 PathProgramCache]: Analyzing trace with hash -206104222, now seen corresponding path program 353 times [2021-06-05 13:57:58,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:58,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432210799] [2021-06-05 13:57:58,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:58,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:58,545 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 13:57:58,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:58,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432210799] [2021-06-05 13:57:58,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432210799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:58,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311930537] [2021-06-05 13:57:58,545 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 13:57:58,571 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:57:58,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:58,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:57:58,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:58,612 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 13:57:58,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311930537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:58,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:58,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-06-05 13:57:58,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894779989] [2021-06-05 13:57:58,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:57:58,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:58,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:57:58,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:57:58,613 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 13:57:58,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:58,821 INFO L93 Difference]: Finished difference Result 18102 states and 52836 transitions. [2021-06-05 13:57:58,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:57:58,822 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 13:57:58,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:58,843 INFO L225 Difference]: With dead ends: 18102 [2021-06-05 13:57:58,843 INFO L226 Difference]: Without dead ends: 18096 [2021-06-05 13:57:58,844 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 134.3ms TimeCoverageRelationStatistics Valid=233, Invalid=469, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:57:58,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18096 states. [2021-06-05 13:57:59,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18096 to 17749. [2021-06-05 13:57:59,064 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 13:57:59,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17749 states to 17749 states and 52328 transitions. [2021-06-05 13:57:59,096 INFO L78 Accepts]: Start accepts. Automaton has 17749 states and 52328 transitions. Word has length 23 [2021-06-05 13:57:59,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:59,096 INFO L482 AbstractCegarLoop]: Abstraction has 17749 states and 52328 transitions. [2021-06-05 13:57:59,096 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 13:57:59,096 INFO L276 IsEmpty]: Start isEmpty. Operand 17749 states and 52328 transitions. [2021-06-05 13:57:59,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:57:59,110 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:59,110 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:59,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3066 [2021-06-05 13:57:59,310 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:59,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:59,311 INFO L82 PathProgramCache]: Analyzing trace with hash 887987366, now seen corresponding path program 354 times [2021-06-05 13:57:59,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:59,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073337664] [2021-06-05 13:57:59,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:59,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:59,394 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 13:57:59,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:59,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073337664] [2021-06-05 13:57:59,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073337664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:59,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263829363] [2021-06-05 13:57:59,394 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 13:57:59,426 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:57:59,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:59,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:57:59,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:59,474 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 13:57:59,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263829363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:59,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:59,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 13:57:59,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88813242] [2021-06-05 13:57:59,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:57:59,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:59,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:57:59,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:57:59,476 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 13:57:59,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:59,742 INFO L93 Difference]: Finished difference Result 20612 states and 59720 transitions. [2021-06-05 13:57:59,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:57:59,743 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 13:57:59,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:59,776 INFO L225 Difference]: With dead ends: 20612 [2021-06-05 13:57:59,776 INFO L226 Difference]: Without dead ends: 20604 [2021-06-05 13:57:59,776 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 171.7ms TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:57:59,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20604 states. [2021-06-05 13:58:00,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20604 to 17773. [2021-06-05 13:58:00,108 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 13:58:00,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17773 states to 17773 states and 52395 transitions. [2021-06-05 13:58:00,157 INFO L78 Accepts]: Start accepts. Automaton has 17773 states and 52395 transitions. Word has length 23 [2021-06-05 13:58:00,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:00,157 INFO L482 AbstractCegarLoop]: Abstraction has 17773 states and 52395 transitions. [2021-06-05 13:58:00,157 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 13:58:00,157 INFO L276 IsEmpty]: Start isEmpty. Operand 17773 states and 52395 transitions. [2021-06-05 13:58:00,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:58:00,177 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:00,177 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:00,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 356 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3067 [2021-06-05 13:58:00,395 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:00,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:00,396 INFO L82 PathProgramCache]: Analyzing trace with hash 445088226, now seen corresponding path program 355 times [2021-06-05 13:58:00,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:00,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155460980] [2021-06-05 13:58:00,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:00,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:00,490 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 13:58:00,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:00,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155460980] [2021-06-05 13:58:00,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155460980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:00,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172290357] [2021-06-05 13:58:00,490 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 13:58:00,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:00,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:58:00,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:00,570 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 13:58:00,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172290357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:00,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:00,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-06-05 13:58:00,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834043468] [2021-06-05 13:58:00,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:58:00,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:00,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:58:00,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:58:00,571 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 13:58:00,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:00,857 INFO L93 Difference]: Finished difference Result 20639 states and 59747 transitions. [2021-06-05 13:58:00,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 13:58:00,858 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 13:58:00,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:00,895 INFO L225 Difference]: With dead ends: 20639 [2021-06-05 13:58:00,895 INFO L226 Difference]: Without dead ends: 20629 [2021-06-05 13:58:00,895 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 196.0ms TimeCoverageRelationStatistics Valid=280, Invalid=590, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:58:00,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20629 states. [2021-06-05 13:58:01,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20629 to 17895. [2021-06-05 13:58:01,222 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 13:58:01,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17895 states to 17895 states and 52759 transitions. [2021-06-05 13:58:01,265 INFO L78 Accepts]: Start accepts. Automaton has 17895 states and 52759 transitions. Word has length 23 [2021-06-05 13:58:01,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:01,265 INFO L482 AbstractCegarLoop]: Abstraction has 17895 states and 52759 transitions. [2021-06-05 13:58:01,266 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 13:58:01,266 INFO L276 IsEmpty]: Start isEmpty. Operand 17895 states and 52759 transitions. [2021-06-05 13:58:01,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:58:01,283 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:01,284 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:01,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3068,357 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:01,502 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:01,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:01,503 INFO L82 PathProgramCache]: Analyzing trace with hash -399883226, now seen corresponding path program 356 times [2021-06-05 13:58:01,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:01,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46733195] [2021-06-05 13:58:01,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:01,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:01,603 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 13:58:01,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:01,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46733195] [2021-06-05 13:58:01,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46733195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:01,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333723850] [2021-06-05 13:58:01,604 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 13:58:01,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:58:01,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:01,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:58:01,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:01,685 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 13:58:01,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333723850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:01,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:01,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-06-05 13:58:01,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164329900] [2021-06-05 13:58:01,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:58:01,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:01,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:58:01,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:58:01,686 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 13:58:02,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:02,027 INFO L93 Difference]: Finished difference Result 20525 states and 59344 transitions. [2021-06-05 13:58:02,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 13:58:02,027 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 13:58:02,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:02,067 INFO L225 Difference]: With dead ends: 20525 [2021-06-05 13:58:02,067 INFO L226 Difference]: Without dead ends: 20513 [2021-06-05 13:58:02,067 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 237.2ms TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 13:58:02,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20513 states. [2021-06-05 13:58:02,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20513 to 17903. [2021-06-05 13:58:02,386 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 13:58:02,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17903 states to 17903 states and 52779 transitions. [2021-06-05 13:58:02,428 INFO L78 Accepts]: Start accepts. Automaton has 17903 states and 52779 transitions. Word has length 23 [2021-06-05 13:58:02,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:02,428 INFO L482 AbstractCegarLoop]: Abstraction has 17903 states and 52779 transitions. [2021-06-05 13:58:02,429 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 13:58:02,429 INFO L276 IsEmpty]: Start isEmpty. Operand 17903 states and 52779 transitions. [2021-06-05 13:58:02,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:58:02,446 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:02,446 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:02,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3069,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:02,663 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:02,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:02,663 INFO L82 PathProgramCache]: Analyzing trace with hash -824194462, now seen corresponding path program 357 times [2021-06-05 13:58:02,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:02,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378500086] [2021-06-05 13:58:02,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:02,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:02,772 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 13:58:02,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:02,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378500086] [2021-06-05 13:58:02,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378500086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:02,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416082247] [2021-06-05 13:58:02,773 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 13:58:02,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:58:02,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:02,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:58:02,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:02,859 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 13:58:02,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416082247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:02,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:02,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 13:58:02,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875154683] [2021-06-05 13:58:02,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:58:02,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:02,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:58:02,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:58:02,869 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 13:58:03,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:03,238 INFO L93 Difference]: Finished difference Result 20558 states and 59379 transitions. [2021-06-05 13:58:03,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 13:58:03,238 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 13:58:03,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:03,282 INFO L225 Difference]: With dead ends: 20558 [2021-06-05 13:58:03,283 INFO L226 Difference]: Without dead ends: 20544 [2021-06-05 13:58:03,283 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 265.9ms TimeCoverageRelationStatistics Valid=384, Invalid=806, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 13:58:03,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20544 states. [2021-06-05 13:58:03,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20544 to 17922. [2021-06-05 13:58:03,730 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 13:58:03,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17922 states to 17922 states and 52827 transitions. [2021-06-05 13:58:03,777 INFO L78 Accepts]: Start accepts. Automaton has 17922 states and 52827 transitions. Word has length 23 [2021-06-05 13:58:03,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:03,777 INFO L482 AbstractCegarLoop]: Abstraction has 17922 states and 52827 transitions. [2021-06-05 13:58:03,777 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 13:58:03,778 INFO L276 IsEmpty]: Start isEmpty. Operand 17922 states and 52827 transitions. [2021-06-05 13:58:03,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:58:03,796 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:03,796 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:04,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3070 [2021-06-05 13:58:04,019 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:04,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:04,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1092940890, now seen corresponding path program 358 times [2021-06-05 13:58:04,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:04,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325434728] [2021-06-05 13:58:04,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:04,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:04,138 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 13:58:04,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:04,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325434728] [2021-06-05 13:58:04,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325434728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:04,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129441555] [2021-06-05 13:58:04,139 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 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 13:58:04,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:58:04,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:04,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:58:04,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:04,219 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 13:58:04,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129441555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:04,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:04,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2021-06-05 13:58:04,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404339378] [2021-06-05 13:58:04,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:58:04,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:04,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:58:04,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:58:04,220 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 13:58:04,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:04,687 INFO L93 Difference]: Finished difference Result 19475 states and 56422 transitions. [2021-06-05 13:58:04,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 13:58:04,687 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 13:58:04,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:04,709 INFO L225 Difference]: With dead ends: 19475 [2021-06-05 13:58:04,709 INFO L226 Difference]: Without dead ends: 19459 [2021-06-05 13:58:04,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 356.7ms TimeCoverageRelationStatistics Valid=511, Invalid=1049, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 13:58:04,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19459 states. [2021-06-05 13:58:04,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19459 to 17924. [2021-06-05 13:58:04,937 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 13:58:04,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17924 states to 17924 states and 52827 transitions. [2021-06-05 13:58:04,971 INFO L78 Accepts]: Start accepts. Automaton has 17924 states and 52827 transitions. Word has length 23 [2021-06-05 13:58:04,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:04,971 INFO L482 AbstractCegarLoop]: Abstraction has 17924 states and 52827 transitions. [2021-06-05 13:58:04,971 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 13:58:04,971 INFO L276 IsEmpty]: Start isEmpty. Operand 17924 states and 52827 transitions. [2021-06-05 13:58:04,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:58:04,985 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:04,985 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:05,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3071,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:05,186 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:05,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:05,186 INFO L82 PathProgramCache]: Analyzing trace with hash -416621138, now seen corresponding path program 359 times [2021-06-05 13:58:05,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:05,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396757062] [2021-06-05 13:58:05,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:05,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:05,292 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 13:58:05,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:05,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396757062] [2021-06-05 13:58:05,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396757062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:05,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980092245] [2021-06-05 13:58:05,293 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 13:58:05,334 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 13:58:05,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:05,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:58:05,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:05,428 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 13:58:05,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980092245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:05,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:05,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 21 [2021-06-05 13:58:05,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502768505] [2021-06-05 13:58:05,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:58:05,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:05,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:58:05,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:58:05,429 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 13:58:05,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:05,723 INFO L93 Difference]: Finished difference Result 18184 states and 53240 transitions. [2021-06-05 13:58:05,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:58:05,723 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 13:58:05,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:05,757 INFO L225 Difference]: With dead ends: 18184 [2021-06-05 13:58:05,757 INFO L226 Difference]: Without dead ends: 18178 [2021-06-05 13:58:05,757 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 243.7ms TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 13:58:05,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18178 states. [2021-06-05 13:58:05,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18178 to 17931. [2021-06-05 13:58:05,990 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 13:58:06,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17931 states to 17931 states and 52836 transitions. [2021-06-05 13:58:06,021 INFO L78 Accepts]: Start accepts. Automaton has 17931 states and 52836 transitions. Word has length 23 [2021-06-05 13:58:06,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:06,021 INFO L482 AbstractCegarLoop]: Abstraction has 17931 states and 52836 transitions. [2021-06-05 13:58:06,021 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 13:58:06,021 INFO L276 IsEmpty]: Start isEmpty. Operand 17931 states and 52836 transitions. [2021-06-05 13:58:06,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:58:06,035 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:06,035 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:06,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3072 [2021-06-05 13:58:06,236 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:06,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:06,236 INFO L82 PathProgramCache]: Analyzing trace with hash -2006669488, now seen corresponding path program 360 times [2021-06-05 13:58:06,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:06,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010925401] [2021-06-05 13:58:06,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:06,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:06,328 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 13:58:06,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:06,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010925401] [2021-06-05 13:58:06,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010925401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:06,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683083771] [2021-06-05 13:58:06,329 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 13:58:06,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:58:06,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:06,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:58:06,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:06,405 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 13:58:06,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683083771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:06,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:06,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 13:58:06,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335902301] [2021-06-05 13:58:06,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:58:06,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:06,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:58:06,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:58:06,406 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 13:58:06,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:06,648 INFO L93 Difference]: Finished difference Result 18330 states and 53673 transitions. [2021-06-05 13:58:06,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 13:58:06,649 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 13:58:06,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:06,672 INFO L225 Difference]: With dead ends: 18330 [2021-06-05 13:58:06,672 INFO L226 Difference]: Without dead ends: 18316 [2021-06-05 13:58:06,673 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 193.4ms TimeCoverageRelationStatistics Valid=305, Invalid=687, Unknown=0, NotChecked=0, Total=992 [2021-06-05 13:58:06,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18316 states. [2021-06-05 13:58:06,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18316 to 17927. [2021-06-05 13:58:06,914 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 13:58:06,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17927 states to 17927 states and 52811 transitions. [2021-06-05 13:58:06,949 INFO L78 Accepts]: Start accepts. Automaton has 17927 states and 52811 transitions. Word has length 23 [2021-06-05 13:58:06,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:06,949 INFO L482 AbstractCegarLoop]: Abstraction has 17927 states and 52811 transitions. [2021-06-05 13:58:06,949 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 13:58:06,949 INFO L276 IsEmpty]: Start isEmpty. Operand 17927 states and 52811 transitions. [2021-06-05 13:58:06,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:58:06,964 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:06,964 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:07,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3073,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:07,165 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:07,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:07,165 INFO L82 PathProgramCache]: Analyzing trace with hash -2053778322, now seen corresponding path program 361 times [2021-06-05 13:58:07,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:07,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831396684] [2021-06-05 13:58:07,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:07,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:07,242 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 13:58:07,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:07,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831396684] [2021-06-05 13:58:07,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831396684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:07,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236872361] [2021-06-05 13:58:07,242 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 13:58:07,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:07,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:58:07,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:07,325 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 13:58:07,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236872361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:07,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:07,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 16 [2021-06-05 13:58:07,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274633148] [2021-06-05 13:58:07,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 13:58:07,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:07,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 13:58:07,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:58:07,326 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 13:58:07,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:07,570 INFO L93 Difference]: Finished difference Result 18362 states and 53572 transitions. [2021-06-05 13:58:07,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:58:07,570 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 13:58:07,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:07,598 INFO L225 Difference]: With dead ends: 18362 [2021-06-05 13:58:07,598 INFO L226 Difference]: Without dead ends: 18354 [2021-06-05 13:58:07,598 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 161.9ms TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:58:07,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18354 states. [2021-06-05 13:58:07,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18354 to 17927. [2021-06-05 13:58:07,853 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 13:58:07,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17927 states to 17927 states and 52789 transitions. [2021-06-05 13:58:07,889 INFO L78 Accepts]: Start accepts. Automaton has 17927 states and 52789 transitions. Word has length 23 [2021-06-05 13:58:07,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:07,889 INFO L482 AbstractCegarLoop]: Abstraction has 17927 states and 52789 transitions. [2021-06-05 13:58:07,889 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 13:58:07,889 INFO L276 IsEmpty]: Start isEmpty. Operand 17927 states and 52789 transitions. [2021-06-05 13:58:07,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:58:07,906 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:07,906 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:08,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3074 [2021-06-05 13:58:08,107 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:08,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:08,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1798289834, now seen corresponding path program 362 times [2021-06-05 13:58:08,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:08,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176261548] [2021-06-05 13:58:08,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:08,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:08,187 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 13:58:08,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:08,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176261548] [2021-06-05 13:58:08,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176261548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:08,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542063944] [2021-06-05 13:58:08,188 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 13:58:08,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:58:08,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:08,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:58:08,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:08,346 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 13:58:08,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542063944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:08,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:08,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 17 [2021-06-05 13:58:08,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658423891] [2021-06-05 13:58:08,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:58:08,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:08,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:58:08,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:58:08,347 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 13:58:08,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:08,580 INFO L93 Difference]: Finished difference Result 18388 states and 53587 transitions. [2021-06-05 13:58:08,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 13:58:08,581 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 13:58:08,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:08,604 INFO L225 Difference]: With dead ends: 18388 [2021-06-05 13:58:08,604 INFO L226 Difference]: Without dead ends: 18378 [2021-06-05 13:58:08,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 166.8ms TimeCoverageRelationStatistics Valid=271, Invalid=599, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:58:08,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18378 states. [2021-06-05 13:58:08,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18378 to 17952. [2021-06-05 13:58:08,850 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 13:58:08,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17952 states to 17952 states and 52847 transitions. [2021-06-05 13:58:08,887 INFO L78 Accepts]: Start accepts. Automaton has 17952 states and 52847 transitions. Word has length 23 [2021-06-05 13:58:08,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:08,887 INFO L482 AbstractCegarLoop]: Abstraction has 17952 states and 52847 transitions. [2021-06-05 13:58:08,887 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 13:58:08,887 INFO L276 IsEmpty]: Start isEmpty. Operand 17952 states and 52847 transitions. [2021-06-05 13:58:08,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:58:08,904 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:08,904 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:09,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3075 [2021-06-05 13:58:09,104 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:09,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:09,104 INFO L82 PathProgramCache]: Analyzing trace with hash 953318382, now seen corresponding path program 363 times [2021-06-05 13:58:09,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:09,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986826695] [2021-06-05 13:58:09,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:09,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:09,188 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 13:58:09,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:09,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986826695] [2021-06-05 13:58:09,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986826695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:09,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061006137] [2021-06-05 13:58:09,189 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 13:58:09,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:58:09,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:09,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:58:09,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:09,265 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 13:58:09,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061006137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:09,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:09,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 13:58:09,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503633886] [2021-06-05 13:58:09,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:58:09,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:09,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:58:09,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:58:09,266 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 13:58:09,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:09,532 INFO L93 Difference]: Finished difference Result 20163 states and 58154 transitions. [2021-06-05 13:58:09,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 13:58:09,532 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 13:58:09,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:09,557 INFO L225 Difference]: With dead ends: 20163 [2021-06-05 13:58:09,557 INFO L226 Difference]: Without dead ends: 20151 [2021-06-05 13:58:09,558 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 203.5ms TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 13:58:09,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20151 states. [2021-06-05 13:58:09,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20151 to 17952. [2021-06-05 13:58:09,789 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 13:58:09,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17952 states to 17952 states and 52844 transitions. [2021-06-05 13:58:09,822 INFO L78 Accepts]: Start accepts. Automaton has 17952 states and 52844 transitions. Word has length 23 [2021-06-05 13:58:09,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:09,823 INFO L482 AbstractCegarLoop]: Abstraction has 17952 states and 52844 transitions. [2021-06-05 13:58:09,823 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 13:58:09,823 INFO L276 IsEmpty]: Start isEmpty. Operand 17952 states and 52844 transitions. [2021-06-05 13:58:09,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:58:09,837 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:09,837 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:10,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 365 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3076 [2021-06-05 13:58:10,038 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:10,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:10,038 INFO L82 PathProgramCache]: Analyzing trace with hash 529007146, now seen corresponding path program 364 times [2021-06-05 13:58:10,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:10,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244429671] [2021-06-05 13:58:10,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:10,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:10,131 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 13:58:10,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:10,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244429671] [2021-06-05 13:58:10,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244429671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:10,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932648802] [2021-06-05 13:58:10,131 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 13:58:10,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:58:10,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:10,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:58:10,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:10,205 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 13:58:10,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932648802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:10,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:10,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 18 [2021-06-05 13:58:10,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558227815] [2021-06-05 13:58:10,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:58:10,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:10,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:58:10,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:58:10,205 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 13:58:10,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:10,493 INFO L93 Difference]: Finished difference Result 20184 states and 58174 transitions. [2021-06-05 13:58:10,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 13:58:10,494 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 13:58:10,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:10,522 INFO L225 Difference]: With dead ends: 20184 [2021-06-05 13:58:10,523 INFO L226 Difference]: Without dead ends: 20170 [2021-06-05 13:58:10,523 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 225.1ms TimeCoverageRelationStatistics Valid=368, Invalid=822, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 13:58:10,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20170 states. [2021-06-05 13:58:10,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20170 to 17968. [2021-06-05 13:58:10,776 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 13:58:10,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17968 states to 17968 states and 52889 transitions. [2021-06-05 13:58:10,813 INFO L78 Accepts]: Start accepts. Automaton has 17968 states and 52889 transitions. Word has length 23 [2021-06-05 13:58:10,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:10,813 INFO L482 AbstractCegarLoop]: Abstraction has 17968 states and 52889 transitions. [2021-06-05 13:58:10,813 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 13:58:10,813 INFO L276 IsEmpty]: Start isEmpty. Operand 17968 states and 52889 transitions. [2021-06-05 13:58:10,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:58:10,829 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:10,829 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:11,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3077 [2021-06-05 13:58:11,030 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:11,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:11,030 INFO L82 PathProgramCache]: Analyzing trace with hash 260260718, now seen corresponding path program 365 times [2021-06-05 13:58:11,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:11,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560290330] [2021-06-05 13:58:11,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:11,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:11,138 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 13:58:11,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:11,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560290330] [2021-06-05 13:58:11,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560290330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:11,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572884522] [2021-06-05 13:58:11,139 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 13:58:11,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:58:11,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:11,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:58:11,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:11,215 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 13:58:11,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572884522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:11,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:11,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 13:58:11,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794566223] [2021-06-05 13:58:11,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:58:11,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:11,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:58:11,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:58:11,216 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 13:58:11,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:11,575 INFO L93 Difference]: Finished difference Result 19526 states and 56440 transitions. [2021-06-05 13:58:11,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 13:58:11,575 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 13:58:11,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:11,596 INFO L225 Difference]: With dead ends: 19526 [2021-06-05 13:58:11,596 INFO L226 Difference]: Without dead ends: 19510 [2021-06-05 13:58:11,597 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 294.0ms TimeCoverageRelationStatistics Valid=488, Invalid=1072, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 13:58:11,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19510 states. [2021-06-05 13:58:11,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19510 to 17968. [2021-06-05 13:58:11,813 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 13:58:11,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17968 states to 17968 states and 52887 transitions. [2021-06-05 13:58:11,844 INFO L78 Accepts]: Start accepts. Automaton has 17968 states and 52887 transitions. Word has length 23 [2021-06-05 13:58:11,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:11,845 INFO L482 AbstractCegarLoop]: Abstraction has 17968 states and 52887 transitions. [2021-06-05 13:58:11,845 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 13:58:11,845 INFO L276 IsEmpty]: Start isEmpty. Operand 17968 states and 52887 transitions. [2021-06-05 13:58:11,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:58:11,858 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:11,858 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:12,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 367 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3078 [2021-06-05 13:58:12,059 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:12,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:12,059 INFO L82 PathProgramCache]: Analyzing trace with hash -333235662, now seen corresponding path program 366 times [2021-06-05 13:58:12,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:12,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079904940] [2021-06-05 13:58:12,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:12,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:12,143 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 13:58:12,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:12,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079904940] [2021-06-05 13:58:12,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079904940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:12,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544010932] [2021-06-05 13:58:12,143 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 13:58:12,169 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 13:58:12,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:12,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:58:12,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:12,216 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 13:58:12,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544010932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:12,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:12,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2021-06-05 13:58:12,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697211402] [2021-06-05 13:58:12,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:58:12,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:12,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:58:12,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:58:12,217 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 13:58:12,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:12,411 INFO L93 Difference]: Finished difference Result 18372 states and 53657 transitions. [2021-06-05 13:58:12,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:58:12,411 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 13:58:12,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:12,433 INFO L225 Difference]: With dead ends: 18372 [2021-06-05 13:58:12,433 INFO L226 Difference]: Without dead ends: 18368 [2021-06-05 13:58:12,434 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 132.4ms TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:58:12,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18368 states. [2021-06-05 13:58:12,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18368 to 18048. [2021-06-05 13:58:12,708 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 13:58:12,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18048 states to 18048 states and 53150 transitions. [2021-06-05 13:58:12,742 INFO L78 Accepts]: Start accepts. Automaton has 18048 states and 53150 transitions. Word has length 23 [2021-06-05 13:58:12,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:12,742 INFO L482 AbstractCegarLoop]: Abstraction has 18048 states and 53150 transitions. [2021-06-05 13:58:12,742 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 13:58:12,742 INFO L276 IsEmpty]: Start isEmpty. Operand 18048 states and 53150 transitions. [2021-06-05 13:58:12,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:58:12,757 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:12,757 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:12,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3079,368 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:12,957 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:12,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:12,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1411119828, now seen corresponding path program 367 times [2021-06-05 13:58:12,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:12,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34119559] [2021-06-05 13:58:12,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:12,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:13,045 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 13:58:13,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:13,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34119559] [2021-06-05 13:58:13,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34119559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:13,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908982600] [2021-06-05 13:58:13,046 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 13:58:13,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:13,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:58:13,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:13,130 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 13:58:13,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908982600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:13,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:13,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 18 [2021-06-05 13:58:13,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218621282] [2021-06-05 13:58:13,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:58:13,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:13,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:58:13,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:58:13,131 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 13:58:13,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:13,385 INFO L93 Difference]: Finished difference Result 19818 states and 57386 transitions. [2021-06-05 13:58:13,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 13:58:13,386 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 13:58:13,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:13,415 INFO L225 Difference]: With dead ends: 19818 [2021-06-05 13:58:13,416 INFO L226 Difference]: Without dead ends: 19806 [2021-06-05 13:58:13,416 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 189.2ms TimeCoverageRelationStatistics Valid=277, Invalid=653, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:58:13,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19806 states. [2021-06-05 13:58:13,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19806 to 18048. [2021-06-05 13:58:13,673 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 13:58:13,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18048 states to 18048 states and 53138 transitions. [2021-06-05 13:58:13,706 INFO L78 Accepts]: Start accepts. Automaton has 18048 states and 53138 transitions. Word has length 23 [2021-06-05 13:58:13,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:13,706 INFO L482 AbstractCegarLoop]: Abstraction has 18048 states and 53138 transitions. [2021-06-05 13:58:13,706 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 13:58:13,706 INFO L276 IsEmpty]: Start isEmpty. Operand 18048 states and 53138 transitions. [2021-06-05 13:58:13,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:58:13,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:13,722 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:13,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3080,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:13,922 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:13,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:13,922 INFO L82 PathProgramCache]: Analyzing trace with hash 986808592, now seen corresponding path program 368 times [2021-06-05 13:58:13,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:13,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891252702] [2021-06-05 13:58:13,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:13,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:14,017 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 13:58:14,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:14,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891252702] [2021-06-05 13:58:14,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891252702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:14,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999746753] [2021-06-05 13:58:14,017 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 13:58:14,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:58:14,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:14,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:58:14,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:14,101 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 13:58:14,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999746753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:14,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:14,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 19 [2021-06-05 13:58:14,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179024585] [2021-06-05 13:58:14,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:58:14,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:14,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:58:14,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:58:14,102 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 13:58:14,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:14,361 INFO L93 Difference]: Finished difference Result 19833 states and 57393 transitions. [2021-06-05 13:58:14,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 13:58:14,362 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 13:58:14,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:14,386 INFO L225 Difference]: With dead ends: 19833 [2021-06-05 13:58:14,386 INFO L226 Difference]: Without dead ends: 19819 [2021-06-05 13:58:14,386 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 206.7ms TimeCoverageRelationStatistics Valid=314, Invalid=742, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 13:58:14,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19819 states. [2021-06-05 13:58:14,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19819 to 18069. [2021-06-05 13:58:14,628 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 13:58:14,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18069 states to 18069 states and 53190 transitions. [2021-06-05 13:58:14,664 INFO L78 Accepts]: Start accepts. Automaton has 18069 states and 53190 transitions. Word has length 23 [2021-06-05 13:58:14,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:14,664 INFO L482 AbstractCegarLoop]: Abstraction has 18069 states and 53190 transitions. [2021-06-05 13:58:14,664 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 13:58:14,664 INFO L276 IsEmpty]: Start isEmpty. Operand 18069 states and 53190 transitions. [2021-06-05 13:58:14,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:58:14,679 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:14,679 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:14,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3081,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:14,880 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:14,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:14,880 INFO L82 PathProgramCache]: Analyzing trace with hash 718062164, now seen corresponding path program 369 times [2021-06-05 13:58:14,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:14,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547031100] [2021-06-05 13:58:14,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:14,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:14,984 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 13:58:14,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:14,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547031100] [2021-06-05 13:58:14,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547031100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:14,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361430779] [2021-06-05 13:58:14,984 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 13:58:15,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:58:15,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:15,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:58:15,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:15,074 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 13:58:15,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361430779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:15,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:15,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 19 [2021-06-05 13:58:15,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709460939] [2021-06-05 13:58:15,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:58:15,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:15,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:58:15,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:58:15,075 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 13:58:15,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:15,396 INFO L93 Difference]: Finished difference Result 19689 states and 56930 transitions. [2021-06-05 13:58:15,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 13:58:15,397 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 13:58:15,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:15,422 INFO L225 Difference]: With dead ends: 19689 [2021-06-05 13:58:15,422 INFO L226 Difference]: Without dead ends: 19673 [2021-06-05 13:58:15,422 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 271.8ms TimeCoverageRelationStatistics Valid=418, Invalid=988, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 13:58:15,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19673 states. [2021-06-05 13:58:15,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19673 to 18069. [2021-06-05 13:58:15,663 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 13:58:15,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18069 states to 18069 states and 53188 transitions. [2021-06-05 13:58:15,698 INFO L78 Accepts]: Start accepts. Automaton has 18069 states and 53188 transitions. Word has length 23 [2021-06-05 13:58:15,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:15,698 INFO L482 AbstractCegarLoop]: Abstraction has 18069 states and 53188 transitions. [2021-06-05 13:58:15,698 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 13:58:15,698 INFO L276 IsEmpty]: Start isEmpty. Operand 18069 states and 53188 transitions. [2021-06-05 13:58:15,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:58:15,713 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:15,713 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:15,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3082 [2021-06-05 13:58:15,914 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:15,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:15,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1747664174, now seen corresponding path program 370 times [2021-06-05 13:58:15,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:15,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851493110] [2021-06-05 13:58:15,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:15,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:16,001 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 13:58:16,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:16,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851493110] [2021-06-05 13:58:16,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851493110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:16,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852943764] [2021-06-05 13:58:16,001 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 13:58:16,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:58:16,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:16,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:58:16,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:16,073 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 13:58:16,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852943764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:16,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:16,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 17 [2021-06-05 13:58:16,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741943287] [2021-06-05 13:58:16,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:58:16,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:16,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:58:16,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:58:16,074 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 13:58:16,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:16,234 INFO L93 Difference]: Finished difference Result 18782 states and 54828 transitions. [2021-06-05 13:58:16,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:58:16,235 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 13:58:16,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:16,260 INFO L225 Difference]: With dead ends: 18782 [2021-06-05 13:58:16,260 INFO L226 Difference]: Without dead ends: 18782 [2021-06-05 13:58:16,260 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 114.5ms TimeCoverageRelationStatistics Valid=157, Invalid=305, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:58:16,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18782 states. [2021-06-05 13:58:16,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18782 to 18363. [2021-06-05 13:58:16,509 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 13:58:16,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18363 states to 18363 states and 54175 transitions. [2021-06-05 13:58:16,544 INFO L78 Accepts]: Start accepts. Automaton has 18363 states and 54175 transitions. Word has length 23 [2021-06-05 13:58:16,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:16,545 INFO L482 AbstractCegarLoop]: Abstraction has 18363 states and 54175 transitions. [2021-06-05 13:58:16,545 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 13:58:16,545 INFO L276 IsEmpty]: Start isEmpty. Operand 18363 states and 54175 transitions. [2021-06-05 13:58:16,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:58:16,561 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:16,561 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:16,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3083,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:16,761 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:16,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:16,761 INFO L82 PathProgramCache]: Analyzing trace with hash -2038116690, now seen corresponding path program 371 times [2021-06-05 13:58:16,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:16,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469311023] [2021-06-05 13:58:16,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:16,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:16,865 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 13:58:16,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:16,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469311023] [2021-06-05 13:58:16,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469311023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:16,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175844521] [2021-06-05 13:58:16,866 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 13:58:16,891 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:58:16,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:16,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:58:16,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:16,966 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 13:58:16,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175844521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:16,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:16,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 20 [2021-06-05 13:58:16,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48813631] [2021-06-05 13:58:16,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:58:16,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:16,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:58:16,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:58:16,967 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 13:58:17,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:17,279 INFO L93 Difference]: Finished difference Result 20117 states and 58445 transitions. [2021-06-05 13:58:17,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 13:58:17,279 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 13:58:17,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:17,307 INFO L225 Difference]: With dead ends: 20117 [2021-06-05 13:58:17,307 INFO L226 Difference]: Without dead ends: 20101 [2021-06-05 13:58:17,307 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 240.0ms TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 13:58:17,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20101 states. [2021-06-05 13:58:17,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20101 to 18363. [2021-06-05 13:58:17,554 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 13:58:17,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18363 states to 18363 states and 54173 transitions. [2021-06-05 13:58:17,595 INFO L78 Accepts]: Start accepts. Automaton has 18363 states and 54173 transitions. Word has length 23 [2021-06-05 13:58:17,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:17,595 INFO L482 AbstractCegarLoop]: Abstraction has 18363 states and 54173 transitions. [2021-06-05 13:58:17,595 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 13:58:17,595 INFO L276 IsEmpty]: Start isEmpty. Operand 18363 states and 54173 transitions. [2021-06-05 13:58:17,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:58:17,613 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:17,613 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:17,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3084 [2021-06-05 13:58:17,813 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:17,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:17,814 INFO L82 PathProgramCache]: Analyzing trace with hash 567863986, now seen corresponding path program 372 times [2021-06-05 13:58:17,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:17,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575749006] [2021-06-05 13:58:17,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:17,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:17,908 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 13:58:17,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:17,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575749006] [2021-06-05 13:58:17,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575749006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:17,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982414281] [2021-06-05 13:58:17,908 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 13:58:17,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 13:58:17,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:17,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:58:17,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:17,982 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 13:58:17,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982414281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:17,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:17,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 17 [2021-06-05 13:58:17,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509498963] [2021-06-05 13:58:17,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:58:17,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:17,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:58:17,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:58:17,983 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 13:58:18,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:18,123 INFO L93 Difference]: Finished difference Result 21290 states and 62446 transitions. [2021-06-05 13:58:18,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:58:18,124 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 13:58:18,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:18,153 INFO L225 Difference]: With dead ends: 21290 [2021-06-05 13:58:18,153 INFO L226 Difference]: Without dead ends: 21290 [2021-06-05 13:58:18,154 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 100.6ms TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:58:18,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21290 states. [2021-06-05 13:58:18,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21290 to 20833. [2021-06-05 13:58:18,470 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 13:58:18,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20833 states to 20833 states and 61752 transitions. [2021-06-05 13:58:18,518 INFO L78 Accepts]: Start accepts. Automaton has 20833 states and 61752 transitions. Word has length 23 [2021-06-05 13:58:18,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:18,518 INFO L482 AbstractCegarLoop]: Abstraction has 20833 states and 61752 transitions. [2021-06-05 13:58:18,518 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 13:58:18,518 INFO L276 IsEmpty]: Start isEmpty. Operand 20833 states and 61752 transitions. [2021-06-05 13:58:18,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:58:18,539 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:18,539 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:18,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3085 [2021-06-05 13:58:18,739 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:18,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:18,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1981648620, now seen corresponding path program 373 times [2021-06-05 13:58:18,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:18,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72078203] [2021-06-05 13:58:18,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:18,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:18,830 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 13:58:18,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:18,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72078203] [2021-06-05 13:58:18,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72078203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:18,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287972582] [2021-06-05 13:58:18,830 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 13:58:18,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:18,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:58:18,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:18,901 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 13:58:18,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287972582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:18,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:18,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 18 [2021-06-05 13:58:18,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516721674] [2021-06-05 13:58:18,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:58:18,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:18,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:58:18,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:58:18,902 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 13:58:19,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:19,033 INFO L93 Difference]: Finished difference Result 21205 states and 62266 transitions. [2021-06-05 13:58:19,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:58:19,034 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 13:58:19,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:19,061 INFO L225 Difference]: With dead ends: 21205 [2021-06-05 13:58:19,061 INFO L226 Difference]: Without dead ends: 21205 [2021-06-05 13:58:19,062 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 100.3ms TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:58:19,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21205 states. [2021-06-05 13:58:19,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21205 to 20832. [2021-06-05 13:58:19,343 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 13:58:19,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20832 states to 20832 states and 61747 transitions. [2021-06-05 13:58:19,385 INFO L78 Accepts]: Start accepts. Automaton has 20832 states and 61747 transitions. Word has length 23 [2021-06-05 13:58:19,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:19,386 INFO L482 AbstractCegarLoop]: Abstraction has 20832 states and 61747 transitions. [2021-06-05 13:58:19,386 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 13:58:19,386 INFO L276 IsEmpty]: Start isEmpty. Operand 20832 states and 61747 transitions. [2021-06-05 13:58:19,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:58:19,402 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:19,403 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:19,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3086,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:19,603 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:19,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:19,603 INFO L82 PathProgramCache]: Analyzing trace with hash -271035312, now seen corresponding path program 374 times [2021-06-05 13:58:19,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:19,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321597409] [2021-06-05 13:58:19,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:19,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:19,695 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 13:58:19,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:19,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321597409] [2021-06-05 13:58:19,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321597409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:19,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485542283] [2021-06-05 13:58:19,695 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 13:58:19,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:58:19,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:19,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:58:19,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:19,763 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 13:58:19,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485542283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:19,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:19,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 17 [2021-06-05 13:58:19,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607875834] [2021-06-05 13:58:19,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 13:58:19,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:19,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 13:58:19,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:58:19,764 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 13:58:19,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:19,983 INFO L93 Difference]: Finished difference Result 21228 states and 62300 transitions. [2021-06-05 13:58:19,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 13:58:19,984 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 13:58:19,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:20,011 INFO L225 Difference]: With dead ends: 21228 [2021-06-05 13:58:20,012 INFO L226 Difference]: Without dead ends: 21226 [2021-06-05 13:58:20,012 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 158.3ms TimeCoverageRelationStatistics Valid=213, Invalid=489, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:58:20,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21226 states. [2021-06-05 13:58:20,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21226 to 20832. [2021-06-05 13:58:20,287 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 13:58:20,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20832 states to 20832 states and 61745 transitions. [2021-06-05 13:58:20,330 INFO L78 Accepts]: Start accepts. Automaton has 20832 states and 61745 transitions. Word has length 23 [2021-06-05 13:58:20,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:20,331 INFO L482 AbstractCegarLoop]: Abstraction has 20832 states and 61745 transitions. [2021-06-05 13:58:20,331 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 13:58:20,331 INFO L276 IsEmpty]: Start isEmpty. Operand 20832 states and 61745 transitions. [2021-06-05 13:58:20,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:58:20,349 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:20,349 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:20,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3087 [2021-06-05 13:58:20,549 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:20,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:20,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1218369684, now seen corresponding path program 375 times [2021-06-05 13:58:20,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:20,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722134972] [2021-06-05 13:58:20,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:20,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:20,656 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 13:58:20,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:20,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722134972] [2021-06-05 13:58:20,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722134972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:20,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607704502] [2021-06-05 13:58:20,657 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 13:58:20,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:58:20,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:20,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:58:20,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:20,735 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 13:58:20,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607704502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:20,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:20,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 18 [2021-06-05 13:58:20,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081987676] [2021-06-05 13:58:20,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:58:20,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:20,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:58:20,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:58:20,736 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 13:58:20,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:20,973 INFO L93 Difference]: Finished difference Result 21234 states and 62306 transitions. [2021-06-05 13:58:20,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 13:58:20,973 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 13:58:20,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:21,000 INFO L225 Difference]: With dead ends: 21234 [2021-06-05 13:58:21,000 INFO L226 Difference]: Without dead ends: 21230 [2021-06-05 13:58:21,000 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 186.4ms TimeCoverageRelationStatistics Valid=239, Invalid=573, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:58:21,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21230 states. [2021-06-05 13:58:21,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21230 to 20841. [2021-06-05 13:58:21,334 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 13:58:21,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20841 states to 20841 states and 61776 transitions. [2021-06-05 13:58:21,375 INFO L78 Accepts]: Start accepts. Automaton has 20841 states and 61776 transitions. Word has length 23 [2021-06-05 13:58:21,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:21,375 INFO L482 AbstractCegarLoop]: Abstraction has 20841 states and 61776 transitions. [2021-06-05 13:58:21,375 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 13:58:21,375 INFO L276 IsEmpty]: Start isEmpty. Operand 20841 states and 61776 transitions. [2021-06-05 13:58:21,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:58:21,392 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:21,392 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:21,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 377 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3088 [2021-06-05 13:58:21,593 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:21,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:21,593 INFO L82 PathProgramCache]: Analyzing trace with hash 145284304, now seen corresponding path program 376 times [2021-06-05 13:58:21,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:21,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708181714] [2021-06-05 13:58:21,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:21,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:21,680 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 13:58:21,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:21,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708181714] [2021-06-05 13:58:21,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708181714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:21,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425309691] [2021-06-05 13:58:21,681 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 13:58:21,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:58:21,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:21,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:58:21,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:21,754 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 13:58:21,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425309691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:21,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:21,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 18 [2021-06-05 13:58:21,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208843137] [2021-06-05 13:58:21,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 13:58:21,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:21,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 13:58:21,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:58:21,755 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 13:58:22,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:22,006 INFO L93 Difference]: Finished difference Result 25243 states and 73892 transitions. [2021-06-05 13:58:22,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 13:58:22,006 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 13:58:22,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:22,045 INFO L225 Difference]: With dead ends: 25243 [2021-06-05 13:58:22,045 INFO L226 Difference]: Without dead ends: 25237 [2021-06-05 13:58:22,045 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 167.9ms TimeCoverageRelationStatistics Valid=233, Invalid=579, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:58:22,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25237 states. [2021-06-05 13:58:22,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25237 to 20841. [2021-06-05 13:58:22,353 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 13:58:22,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20841 states to 20841 states and 61770 transitions. [2021-06-05 13:58:22,394 INFO L78 Accepts]: Start accepts. Automaton has 20841 states and 61770 transitions. Word has length 23 [2021-06-05 13:58:22,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:22,395 INFO L482 AbstractCegarLoop]: Abstraction has 20841 states and 61770 transitions. [2021-06-05 13:58:22,395 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 13:58:22,395 INFO L276 IsEmpty]: Start isEmpty. Operand 20841 states and 61770 transitions. [2021-06-05 13:58:22,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:58:22,411 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:22,411 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:22,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3089 [2021-06-05 13:58:22,612 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:22,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:22,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1239375892, now seen corresponding path program 377 times [2021-06-05 13:58:22,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:22,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418178532] [2021-06-05 13:58:22,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:22,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:22,704 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 13:58:22,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:22,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418178532] [2021-06-05 13:58:22,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418178532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:22,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468178277] [2021-06-05 13:58:22,704 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 13:58:22,729 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:58:22,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:22,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:58:22,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:22,790 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 13:58:22,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468178277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:22,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:22,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 19 [2021-06-05 13:58:22,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350392929] [2021-06-05 13:58:22,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:58:22,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:22,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:58:22,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:58:22,791 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 13:58:23,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:23,059 INFO L93 Difference]: Finished difference Result 25260 states and 73908 transitions. [2021-06-05 13:58:23,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 13:58:23,059 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 13:58:23,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:23,098 INFO L225 Difference]: With dead ends: 25260 [2021-06-05 13:58:23,098 INFO L226 Difference]: Without dead ends: 25252 [2021-06-05 13:58:23,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 189.5ms TimeCoverageRelationStatistics Valid=263, Invalid=667, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:58:23,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25252 states. [2021-06-05 13:58:23,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25252 to 20870. [2021-06-05 13:58:23,424 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 13:58:23,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20870 states to 20870 states and 61848 transitions. [2021-06-05 13:58:23,473 INFO L78 Accepts]: Start accepts. Automaton has 20870 states and 61848 transitions. Word has length 23 [2021-06-05 13:58:23,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:23,474 INFO L482 AbstractCegarLoop]: Abstraction has 20870 states and 61848 transitions. [2021-06-05 13:58:23,474 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 13:58:23,474 INFO L276 IsEmpty]: Start isEmpty. Operand 20870 states and 61848 transitions. [2021-06-05 13:58:23,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:58:23,493 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:23,493 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:23,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3090,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:23,694 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:23,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:23,694 INFO L82 PathProgramCache]: Analyzing trace with hash 796476752, now seen corresponding path program 378 times [2021-06-05 13:58:23,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:23,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625544597] [2021-06-05 13:58:23,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:23,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:23,803 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 13:58:23,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:23,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625544597] [2021-06-05 13:58:23,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625544597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:23,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353571473] [2021-06-05 13:58:23,804 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 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 13:58:23,829 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:58:23,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:23,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:58:23,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:23,891 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 13:58:23,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353571473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:23,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:23,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 19 [2021-06-05 13:58:23,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746086824] [2021-06-05 13:58:23,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 13:58:23,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:23,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 13:58:23,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:58:23,892 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 13:58:24,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:24,162 INFO L93 Difference]: Finished difference Result 24954 states and 72952 transitions. [2021-06-05 13:58:24,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 13:58:24,163 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 13:58:24,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:24,200 INFO L225 Difference]: With dead ends: 24954 [2021-06-05 13:58:24,200 INFO L226 Difference]: Without dead ends: 24944 [2021-06-05 13:58:24,201 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 212.4ms TimeCoverageRelationStatistics Valid=259, Invalid=671, Unknown=0, NotChecked=0, Total=930 [2021-06-05 13:58:24,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24944 states. [2021-06-05 13:58:24,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24944 to 20870. [2021-06-05 13:58:24,513 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 13:58:24,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20870 states to 20870 states and 61842 transitions. [2021-06-05 13:58:24,552 INFO L78 Accepts]: Start accepts. Automaton has 20870 states and 61842 transitions. Word has length 23 [2021-06-05 13:58:24,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:24,552 INFO L482 AbstractCegarLoop]: Abstraction has 20870 states and 61842 transitions. [2021-06-05 13:58:24,552 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 13:58:24,552 INFO L276 IsEmpty]: Start isEmpty. Operand 20870 states and 61842 transitions. [2021-06-05 13:58:24,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:58:24,568 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:24,568 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:24,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3091,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:24,773 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:24,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:24,775 INFO L82 PathProgramCache]: Analyzing trace with hash -48494700, now seen corresponding path program 379 times [2021-06-05 13:58:24,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:24,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422267512] [2021-06-05 13:58:24,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:24,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:24,870 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 13:58:24,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:24,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422267512] [2021-06-05 13:58:24,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422267512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:24,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406232484] [2021-06-05 13:58:24,870 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 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 13:58:24,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:24,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:58:24,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:24,965 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 13:58:24,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406232484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:24,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:24,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 20 [2021-06-05 13:58:24,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394273676] [2021-06-05 13:58:24,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:58:24,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:24,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:58:24,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:58:24,966 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 13:58:25,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:25,246 INFO L93 Difference]: Finished difference Result 24983 states and 72980 transitions. [2021-06-05 13:58:25,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 13:58:25,246 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 13:58:25,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:25,283 INFO L225 Difference]: With dead ends: 24983 [2021-06-05 13:58:25,283 INFO L226 Difference]: Without dead ends: 24971 [2021-06-05 13:58:25,283 INFO L777 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 13:58:25,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24971 states. [2021-06-05 13:58:25,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24971 to 20967. [2021-06-05 13:58:25,637 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 13:58:25,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20967 states to 20967 states and 62125 transitions. [2021-06-05 13:58:25,678 INFO L78 Accepts]: Start accepts. Automaton has 20967 states and 62125 transitions. Word has length 23 [2021-06-05 13:58:25,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:25,678 INFO L482 AbstractCegarLoop]: Abstraction has 20967 states and 62125 transitions. [2021-06-05 13:58:25,678 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 13:58:25,678 INFO L276 IsEmpty]: Start isEmpty. Operand 20967 states and 62125 transitions. [2021-06-05 13:58:25,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:58:25,695 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:25,695 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:25,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3092 [2021-06-05 13:58:25,896 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:25,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:25,896 INFO L82 PathProgramCache]: Analyzing trace with hash -472805936, now seen corresponding path program 380 times [2021-06-05 13:58:25,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:25,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733200993] [2021-06-05 13:58:25,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:25,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:26,009 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 13:58:26,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:26,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733200993] [2021-06-05 13:58:26,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733200993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:26,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107363175] [2021-06-05 13:58:26,010 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 13:58:26,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:58:26,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:26,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:58:26,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:26,110 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 13:58:26,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107363175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:26,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:26,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 20 [2021-06-05 13:58:26,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242233546] [2021-06-05 13:58:26,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:58:26,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:26,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:58:26,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:58:26,111 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 13:58:26,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:26,395 INFO L93 Difference]: Finished difference Result 23366 states and 68426 transitions. [2021-06-05 13:58:26,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 13:58:26,396 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 13:58:26,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:26,432 INFO L225 Difference]: With dead ends: 23366 [2021-06-05 13:58:26,433 INFO L226 Difference]: Without dead ends: 23352 [2021-06-05 13:58:26,433 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 242.9ms TimeCoverageRelationStatistics Valid=291, Invalid=765, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 13:58:26,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23352 states. [2021-06-05 13:58:26,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23352 to 20967. [2021-06-05 13:58:26,724 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 13:58:26,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20967 states to 20967 states and 62123 transitions. [2021-06-05 13:58:26,766 INFO L78 Accepts]: Start accepts. Automaton has 20967 states and 62123 transitions. Word has length 23 [2021-06-05 13:58:26,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:26,767 INFO L482 AbstractCegarLoop]: Abstraction has 20967 states and 62123 transitions. [2021-06-05 13:58:26,767 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 13:58:26,767 INFO L276 IsEmpty]: Start isEmpty. Operand 20967 states and 62123 transitions. [2021-06-05 13:58:26,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:58:26,785 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:26,785 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:26,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3093,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:26,986 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:26,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:26,986 INFO L82 PathProgramCache]: Analyzing trace with hash -741552364, now seen corresponding path program 381 times [2021-06-05 13:58:26,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:26,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184781166] [2021-06-05 13:58:26,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:26,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:27,089 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 13:58:27,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:27,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184781166] [2021-06-05 13:58:27,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184781166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:27,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56931809] [2021-06-05 13:58:27,090 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 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 13:58:27,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:58:27,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:27,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 13:58:27,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:27,202 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 13:58:27,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56931809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:27,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:27,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 21 [2021-06-05 13:58:27,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216716357] [2021-06-05 13:58:27,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:58:27,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:27,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:58:27,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:58:27,203 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 13:58:27,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:27,507 INFO L93 Difference]: Finished difference Result 23400 states and 68462 transitions. [2021-06-05 13:58:27,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 13:58:27,507 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 13:58:27,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:27,539 INFO L225 Difference]: With dead ends: 23400 [2021-06-05 13:58:27,539 INFO L226 Difference]: Without dead ends: 23384 [2021-06-05 13:58:27,539 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 257.8ms TimeCoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 13:58:27,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23384 states. [2021-06-05 13:58:27,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23384 to 20978. [2021-06-05 13:58:27,830 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 13:58:27,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20978 states to 20978 states and 62154 transitions. [2021-06-05 13:58:27,878 INFO L78 Accepts]: Start accepts. Automaton has 20978 states and 62154 transitions. Word has length 23 [2021-06-05 13:58:27,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:27,878 INFO L482 AbstractCegarLoop]: Abstraction has 20978 states and 62154 transitions. [2021-06-05 13:58:27,878 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 13:58:27,878 INFO L276 IsEmpty]: Start isEmpty. Operand 20978 states and 62154 transitions. [2021-06-05 13:58:27,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:58:27,897 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:27,897 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:28,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3094 [2021-06-05 13:58:28,097 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:28,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:28,098 INFO L82 PathProgramCache]: Analyzing trace with hash -482757040, now seen corresponding path program 382 times [2021-06-05 13:58:28,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:28,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403777339] [2021-06-05 13:58:28,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:28,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:28,201 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 13:58:28,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:28,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403777339] [2021-06-05 13:58:28,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403777339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:28,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323924228] [2021-06-05 13:58:28,202 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 13:58:28,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:58:28,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:28,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 13:58:28,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:28,332 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 13:58:28,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323924228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:28,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:28,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-06-05 13:58:28,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952990785] [2021-06-05 13:58:28,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 13:58:28,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:28,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 13:58:28,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2021-06-05 13:58:28,332 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 13:58:28,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:28,598 INFO L93 Difference]: Finished difference Result 21340 states and 63016 transitions. [2021-06-05 13:58:28,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 13:58:28,599 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 13:58:28,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:28,626 INFO L225 Difference]: With dead ends: 21340 [2021-06-05 13:58:28,626 INFO L226 Difference]: Without dead ends: 21331 [2021-06-05 13:58:28,626 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 279.1ms TimeCoverageRelationStatistics Valid=322, Invalid=938, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 13:58:28,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21331 states. [2021-06-05 13:58:28,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21331 to 20978. [2021-06-05 13:58:28,894 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 13:58:28,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20978 states to 20978 states and 62153 transitions. [2021-06-05 13:58:28,934 INFO L78 Accepts]: Start accepts. Automaton has 20978 states and 62153 transitions. Word has length 23 [2021-06-05 13:58:28,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:28,934 INFO L482 AbstractCegarLoop]: Abstraction has 20978 states and 62153 transitions. [2021-06-05 13:58:28,934 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 13:58:28,934 INFO L276 IsEmpty]: Start isEmpty. Operand 20978 states and 62153 transitions. [2021-06-05 13:58:28,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:58:28,951 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:28,951 INFO L521 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:29,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3095 [2021-06-05 13:58:29,152 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:29,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:29,152 INFO L82 PathProgramCache]: Analyzing trace with hash 782455791, now seen corresponding path program 383 times [2021-06-05 13:58:29,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:29,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359342828] [2021-06-05 13:58:29,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:29,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:29,220 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 13:58:29,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:29,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359342828] [2021-06-05 13:58:29,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359342828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:29,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118447770] [2021-06-05 13:58:29,221 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 13:58:29,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:58:29,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:29,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:58:29,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:29,684 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 13:58:29,684 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:58:29,685 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 13:58:29,855 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 115 [2021-06-05 13:58:30,833 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 437 [2021-06-05 13:58:31,085 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2021-06-05 13:58:31,615 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 341 [2021-06-05 13:58:32,014 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 774 DAG size of output: 677 [2021-06-05 13:58:32,596 WARN L205 SmtUtils]: Spent 577.00 ms on a formula simplification. DAG size of input: 796 DAG size of output: 685 [2021-06-05 13:58:33,501 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 135 [2021-06-05 13:58:33,930 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 407 DAG size of output: 358 [2021-06-05 13:58:34,105 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 361 [2021-06-05 13:58:34,410 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 569 DAG size of output: 479 [2021-06-05 13:58:34,880 WARN L205 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 601 DAG size of output: 509 [2021-06-05 13:58:35,909 WARN L205 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 1270 DAG size of output: 1042 [2021-06-05 13:58:36,953 WARN L205 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 1270 DAG size of output: 1042 [2021-06-05 13:58:38,108 WARN L205 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 1281 DAG size of output: 1053 [2021-06-05 13:58:39,233 WARN L205 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 1055 DAG size of output: 1466 [2021-06-05 13:58:39,448 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 1050 DAG size of output: 1118 [2021-06-05 13:58:39,909 WARN L205 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 1045 DAG size of output: 1044 [2021-06-05 13:58:40,297 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 471 DAG size of output: 468 [2021-06-05 13:58:40,656 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 465 DAG size of output: 434 [2021-06-05 13:58:40,852 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 425 DAG size of output: 394 [2021-06-05 13:58:41,664 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 457 DAG size of output: 255 [2021-06-05 13:58:41,925 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 474 DAG size of output: 270 [2021-06-05 13:58:42,377 WARN L205 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 687 DAG size of output: 634 [2021-06-05 13:58:42,687 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 631 DAG size of output: 523 [2021-06-05 13:58:43,833 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 503 DAG size of output: 269 [2021-06-05 13:58:44,030 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 514 DAG size of output: 274 [2021-06-05 13:58:44,397 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 843 DAG size of output: 434 [2021-06-05 13:58:44,962 WARN L205 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 931 DAG size of output: 521 [2021-06-05 13:58:45,864 WARN L205 SmtUtils]: Spent 895.00 ms on a formula simplification. DAG size of input: 1380 DAG size of output: 888 [2021-06-05 13:58:47,176 WARN L205 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 1380 DAG size of output: 888 [2021-06-05 13:58:48,277 WARN L205 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 1386 DAG size of output: 895 [2021-06-05 13:58:49,418 WARN L205 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 897 DAG size of output: 597 [2021-06-05 13:58:49,789 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 443 [2021-06-05 13:58:50,070 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 467 [2021-06-05 13:58:50,412 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 279 [2021-06-05 13:58:51,094 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 386 [2021-06-05 13:58:51,463 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 306 [2021-06-05 13:58:52,178 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 227 [2021-06-05 13:58:52,381 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 538 DAG size of output: 292 [2021-06-05 13:58:52,612 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 298 [2021-06-05 13:58:53,117 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 195 [2021-06-05 13:58:53,954 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 752 DAG size of output: 373 [2021-06-05 13:58:54,408 WARN L205 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 950 DAG size of output: 544 [2021-06-05 13:58:54,884 WARN L205 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 950 DAG size of output: 544 [2021-06-05 13:58:55,503 WARN L205 SmtUtils]: Spent 616.00 ms on a formula simplification. DAG size of input: 957 DAG size of output: 550 [2021-06-05 13:58:56,017 WARN L205 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 549 DAG size of output: 630 [2021-06-05 13:58:56,167 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 238 [2021-06-05 13:58:56,806 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 331 [2021-06-05 13:58:56,929 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 222 [2021-06-05 13:58:57,271 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 301 [2021-06-05 13:58:57,425 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 343 [2021-06-05 13:58:57,580 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 343 [2021-06-05 13:58:57,735 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 445 DAG size of output: 242 [2021-06-05 13:58:58,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:58:58,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:58:58,355 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:58:58,355 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 13:58:58,360 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 13:58:58,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118447770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:58,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:58,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-06-05 13:58:58,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519873225] [2021-06-05 13:58:58,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 13:58:58,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:58,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 13:58:58,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:58:58,361 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 13:58:58,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:58,813 INFO L93 Difference]: Finished difference Result 21192 states and 62579 transitions. [2021-06-05 13:58:58,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 13:58:58,813 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 13:58:58,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:58,887 INFO L225 Difference]: With dead ends: 21192 [2021-06-05 13:58:58,887 INFO L226 Difference]: Without dead ends: 21189 [2021-06-05 13:58:58,888 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 283.0ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:58:58,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21189 states. [2021-06-05 13:58:59,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21189 to 21059. [2021-06-05 13:58:59,133 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 13:58:59,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21059 states to 21059 states and 62393 transitions. [2021-06-05 13:58:59,175 INFO L78 Accepts]: Start accepts. Automaton has 21059 states and 62393 transitions. Word has length 24 [2021-06-05 13:58:59,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:59,175 INFO L482 AbstractCegarLoop]: Abstraction has 21059 states and 62393 transitions. [2021-06-05 13:58:59,176 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 13:58:59,176 INFO L276 IsEmpty]: Start isEmpty. Operand 21059 states and 62393 transitions. [2021-06-05 13:58:59,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:58:59,193 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:59,193 INFO L521 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:59,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3096,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:59,394 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:59,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:59,398 INFO L82 PathProgramCache]: Analyzing trace with hash -840131025, now seen corresponding path program 384 times [2021-06-05 13:58:59,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:59,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638468975] [2021-06-05 13:58:59,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:59,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:59,465 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 13:58:59,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:59,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638468975] [2021-06-05 13:58:59,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638468975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:59,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774365807] [2021-06-05 13:58:59,465 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 13:58:59,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:58:59,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:59,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:58:59,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:59,930 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 13:58:59,930 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:58:59,931 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 13:59:00,923 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 481 DAG size of output: 380 [2021-06-05 13:59:01,112 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 497 DAG size of output: 396 [2021-06-05 13:59:01,347 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 518 DAG size of output: 419 [2021-06-05 13:59:01,703 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 528 DAG size of output: 428 [2021-06-05 13:59:02,398 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 339 [2021-06-05 13:59:03,131 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 399 DAG size of output: 350 [2021-06-05 13:59:03,399 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 686 DAG size of output: 589 [2021-06-05 13:59:03,804 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 700 DAG size of output: 601 [2021-06-05 13:59:04,200 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 720 DAG size of output: 611 [2021-06-05 13:59:04,678 WARN L205 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 730 DAG size of output: 624 [2021-06-05 13:59:05,620 WARN L205 SmtUtils]: Spent 938.00 ms on a formula simplification. DAG size of input: 1119 DAG size of output: 918 [2021-06-05 13:59:06,495 WARN L205 SmtUtils]: Spent 869.00 ms on a formula simplification. DAG size of input: 1119 DAG size of output: 918 [2021-06-05 13:59:07,521 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 1128 DAG size of output: 927 [2021-06-05 13:59:08,403 WARN L205 SmtUtils]: Spent 875.00 ms on a formula simplification. DAG size of input: 929 DAG size of output: 788 [2021-06-05 13:59:08,968 WARN L205 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 634 DAG size of output: 661 [2021-06-05 13:59:09,499 WARN L205 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 577 DAG size of output: 643 [2021-06-05 13:59:09,658 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 502 DAG size of output: 486 [2021-06-05 13:59:10,199 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 468 DAG size of output: 324 [2021-06-05 13:59:10,403 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 382 [2021-06-05 13:59:10,514 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 274 [2021-06-05 13:59:11,269 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 281 [2021-06-05 13:59:11,665 WARN L205 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 671 DAG size of output: 480 [2021-06-05 13:59:12,387 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 173 [2021-06-05 13:59:12,525 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 252 [2021-06-05 13:59:13,021 WARN L205 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 866 DAG size of output: 528 [2021-06-05 13:59:13,636 WARN L205 SmtUtils]: Spent 610.00 ms on a formula simplification. DAG size of input: 1012 DAG size of output: 622 [2021-06-05 13:59:14,299 WARN L205 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 1012 DAG size of output: 622 [2021-06-05 13:59:15,013 WARN L205 SmtUtils]: Spent 709.00 ms on a formula simplification. DAG size of input: 1024 DAG size of output: 634 [2021-06-05 13:59:15,769 WARN L205 SmtUtils]: Spent 691.00 ms on a formula simplification. DAG size of input: 631 DAG size of output: 668 [2021-06-05 13:59:16,216 WARN L205 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 505 DAG size of output: 512 [2021-06-05 13:59:16,611 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 469 DAG size of output: 496 [2021-06-05 13:59:17,352 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 401 DAG size of output: 496 [2021-06-05 13:59:17,505 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 364 [2021-06-05 13:59:17,644 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 168 [2021-06-05 13:59:17,848 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 357 [2021-06-05 13:59:18,192 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 412 DAG size of output: 225 [2021-06-05 13:59:18,486 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 508 DAG size of output: 303 [2021-06-05 13:59:18,789 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 553 DAG size of output: 337 [2021-06-05 13:59:18,977 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 320 [2021-06-05 13:59:19,783 WARN L205 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 691 DAG size of output: 398 [2021-06-05 13:59:20,161 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 691 DAG size of output: 398 [2021-06-05 13:59:20,760 WARN L205 SmtUtils]: Spent 594.00 ms on a formula simplification. DAG size of input: 700 DAG size of output: 468 [2021-06-05 13:59:21,091 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 404 DAG size of output: 400 [2021-06-05 13:59:21,211 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 198 [2021-06-05 13:59:21,963 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 259 [2021-06-05 13:59:22,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 13:59:22,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:22,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 13:59:22,693 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 13:59:22,699 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 13:59:22,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774365807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:22,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:22,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-06-05 13:59:22,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691711002] [2021-06-05 13:59:22,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 13:59:22,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:22,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 13:59:22,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:59:22,700 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 13:59:22,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:22,975 INFO L93 Difference]: Finished difference Result 21285 states and 62822 transitions. [2021-06-05 13:59:22,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 13:59:22,976 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 13:59:22,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:23,004 INFO L225 Difference]: With dead ends: 21285 [2021-06-05 13:59:23,004 INFO L226 Difference]: Without dead ends: 21282 [2021-06-05 13:59:23,004 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 282.2ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:59:23,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21282 states. [2021-06-05 13:59:23,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21282 to 21109. [2021-06-05 13:59:23,286 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 13:59:23,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21109 states to 21109 states and 62564 transitions. [2021-06-05 13:59:23,327 INFO L78 Accepts]: Start accepts. Automaton has 21109 states and 62564 transitions. Word has length 24 [2021-06-05 13:59:23,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:23,327 INFO L482 AbstractCegarLoop]: Abstraction has 21109 states and 62564 transitions. [2021-06-05 13:59:23,327 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 13:59:23,327 INFO L276 IsEmpty]: Start isEmpty. Operand 21109 states and 62564 transitions. [2021-06-05 13:59:23,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 13:59:23,344 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:23,344 INFO L521 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:23,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4419 [2021-06-05 13:59:23,545 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:23,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:23,545 INFO L82 PathProgramCache]: Analyzing trace with hash 156074215, now seen corresponding path program 385 times [2021-06-05 13:59:23,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:23,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360778018] [2021-06-05 13:59:23,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:23,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:23,610 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 13:59:23,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:23,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360778018] [2021-06-05 13:59:23,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360778018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:23,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209213367] [2021-06-05 13:59:23,611 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 13:59:23,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:23,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 13:59:23,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:24,182 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 13:59:24,182 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 13:59:24,182 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 13:59:24,912 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 403 DAG size of output: 351 [2021-06-05 13:59:25,067 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 420 DAG size of output: 358 [2021-06-05 13:59:25,256 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 434 DAG size of output: 372 [2021-06-05 13:59:25,479 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 405 [2021-06-05 13:59:26,223 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 374 DAG size of output: 319 [2021-06-05 13:59:26,364 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 328 [2021-06-05 13:59:26,532 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 407 DAG size of output: 342 [2021-06-05 13:59:26,733 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 377 [2021-06-05 13:59:27,200 WARN L205 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 775 DAG size of output: 656 [2021-06-05 13:59:27,678 WARN L205 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 775 DAG size of output: 656 [2021-06-05 13:59:28,304 WARN L205 SmtUtils]: Spent 622.00 ms on a formula simplification. DAG size of input: 784 DAG size of output: 665 [2021-06-05 13:59:28,875 WARN L205 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 667 DAG size of output: 655 [2021-06-05 13:59:29,038 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 576 DAG size of output: 536 [2021-06-05 13:59:29,183 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 345 [2021-06-05 13:59:29,330 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 295 [2021-06-05 13:59:29,615 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 103 [2021-06-05 13:59:29,807 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 272 [2021-06-05 13:59:30,425 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 195 [2021-06-05 13:59:30,545 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 222 [2021-06-05 13:59:30,890 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 394 DAG size of output: 266 [2021-06-05 13:59:31,086 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 407 DAG size of output: 269 [2021-06-05 13:59:31,891 WARN L205 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 704 DAG size of output: 471 [2021-06-05 13:59:32,005 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 277 [2021-06-05 13:59:32,635 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 262 [2021-06-05 13:59:32,738 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 265 [2021-06-05 13:59:33,343 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 249 [2021-06-05 13:59:33,565 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 306 [2021-06-05 13:59:34,256 WARN L205 SmtUtils]: Spent 688.00 ms on a formula simplification. DAG size of input: 924 DAG size of output: 626 [2021-06-05 13:59:34,889 WARN L205 SmtUtils]: Spent 628.00 ms on a formula simplification. DAG size of input: 924 DAG size of output: 626 [2021-06-05 13:59:35,629 WARN L205 SmtUtils]: Spent 736.00 ms on a formula simplification. DAG size of input: 933 DAG size of output: 635 [2021-06-05 13:59:36,701 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 637 DAG size of output: 794 [2021-06-05 13:59:37,582 WARN L205 SmtUtils]: Spent 876.00 ms on a formula simplification. DAG size of input: 524 DAG size of output: 681 [2021-06-05 13:59:38,030 WARN L205 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 468 DAG size of output: 500 [2021-06-05 13:59:38,174 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 455 DAG size of output: 410 [2021-06-05 13:59:38,291 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 249 [2021-06-05 13:59:39,527 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 249 [2021-06-05 13:59:39,782 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 388 DAG size of output: 305 [2021-06-05 13:59:39,887 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 229 [2021-06-05 13:59:40,648 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 228 [2021-06-05 13:59:41,520 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 249 [2021-06-05 13:59:41,736 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 281 [2021-06-05 13:59:42,025 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 523 DAG size of output: 396 [2021-06-05 13:59:42,554 WARN L205 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 805 DAG size of output: 595 [2021-06-05 13:59:43,794 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 274 [2021-06-05 13:59:45,785 WARN L205 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 1266 DAG size of output: 944 [2021-06-05 13:59:47,020 WARN L205 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 1366 DAG size of output: 988 [2021-06-05 13:59:48,643 WARN L205 SmtUtils]: Spent 1.62 s on a formula simplification. DAG size of input: 1585 DAG size of output: 1151 [2021-06-05 13:59:50,478 WARN L205 SmtUtils]: Spent 1.83 s on a formula simplification. DAG size of input: 1856 DAG size of output: 1314 [2021-06-05 13:59:52,300 WARN L205 SmtUtils]: Spent 1.81 s on a formula simplification. DAG size of input: 1856 DAG size of output: 1314 [2021-06-05 13:59:54,293 WARN L205 SmtUtils]: Spent 1.99 s on a formula simplification. DAG size of input: 1862 DAG size of output: 1320 [2021-06-05 13:59:54,925 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 934 DAG size of output: 951 [2021-06-05 13:59:55,646 WARN L205 SmtUtils]: Spent 714.00 ms on a formula simplification. DAG size of input: 929 DAG size of output: 928 [2021-06-05 13:59:56,031 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 862 DAG size of output: 534 [2021-06-05 13:59:56,616 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 441 DAG size of output: 233 [2021-06-05 13:59:56,846 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 614 DAG size of output: 396 [2021-06-05 13:59:57,494 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 687 DAG size of output: 419 [2021-06-05 13:59:57,773 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 687 DAG size of output: 419 [2021-06-05 13:59:58,083 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 694 DAG size of output: 426 [2021-06-05 13:59:58,345 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 428 DAG size of output: 391 [2021-06-05 13:59:58,679 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 366 [2021-06-05 13:59:59,082 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 205 [2021-06-05 13:59:59,193 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 209 [2021-06-05 13:59:59,734 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 271 [2021-06-05 13:59:59,883 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 404 DAG size of output: 295 [2021-06-05 14:00:00,069 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 538 DAG size of output: 360 [2021-06-05 14:00:00,256 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 538 DAG size of output: 360 [2021-06-05 14:00:00,450 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 363 [2021-06-05 14:00:00,614 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 201 [2021-06-05 14:00:00,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:00,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:00,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:00:00,763 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 14:00:00,769 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 14:00:00,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209213367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:00,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:00,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-06-05 14:00:00,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168239493] [2021-06-05 14:00:00,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 14:00:00,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:00,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 14:00:00,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:00:00,770 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 14:00:01,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:01,134 INFO L93 Difference]: Finished difference Result 21361 states and 63065 transitions. [2021-06-05 14:00:01,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:00:01,134 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 14:00:01,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:01,162 INFO L225 Difference]: With dead ends: 21361 [2021-06-05 14:00:01,162 INFO L226 Difference]: Without dead ends: 21358 [2021-06-05 14:00:01,162 INFO L777 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 14:00:01,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21358 states. [2021-06-05 14:00:01,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21358 to 21176. [2021-06-05 14:00:01,439 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 14:00:01,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21176 states to 21176 states and 62792 transitions. [2021-06-05 14:00:01,490 INFO L78 Accepts]: Start accepts. Automaton has 21176 states and 62792 transitions. Word has length 24 [2021-06-05 14:00:01,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:01,490 INFO L482 AbstractCegarLoop]: Abstraction has 21176 states and 62792 transitions. [2021-06-05 14:00:01,490 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 14:00:01,490 INFO L276 IsEmpty]: Start isEmpty. Operand 21176 states and 62792 transitions. [2021-06-05 14:00:01,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:00:01,511 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:01,511 INFO L521 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:01,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 387 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5277 [2021-06-05 14:00:01,712 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:01,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:01,712 INFO L82 PathProgramCache]: Analyzing trace with hash 973665583, now seen corresponding path program 386 times [2021-06-05 14:00:01,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:01,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063681129] [2021-06-05 14:00:01,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:01,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:01,781 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 14:00:01,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:01,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063681129] [2021-06-05 14:00:01,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063681129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:01,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470044403] [2021-06-05 14:00:01,781 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 14:00:01,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:00:01,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:01,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:00:01,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:02,333 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 14:00:02,334 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:02,334 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 14:00:03,205 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 420 DAG size of output: 360 [2021-06-05 14:00:03,386 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 443 DAG size of output: 382 [2021-06-05 14:00:03,614 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 465 DAG size of output: 404 [2021-06-05 14:00:03,900 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 484 DAG size of output: 416 [2021-06-05 14:00:05,080 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 325 [2021-06-05 14:00:05,244 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 343 [2021-06-05 14:00:05,506 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 564 DAG size of output: 465 [2021-06-05 14:00:05,828 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 585 DAG size of output: 486 [2021-06-05 14:00:06,230 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 603 DAG size of output: 498 [2021-06-05 14:00:07,072 WARN L205 SmtUtils]: Spent 838.00 ms on a formula simplification. DAG size of input: 950 DAG size of output: 770 [2021-06-05 14:00:07,839 WARN L205 SmtUtils]: Spent 762.00 ms on a formula simplification. DAG size of input: 950 DAG size of output: 770 [2021-06-05 14:00:08,747 WARN L205 SmtUtils]: Spent 905.00 ms on a formula simplification. DAG size of input: 962 DAG size of output: 782 [2021-06-05 14:00:09,963 WARN L205 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 784 DAG size of output: 877 [2021-06-05 14:00:10,507 WARN L205 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 696 DAG size of output: 712 [2021-06-05 14:00:10,930 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 450 DAG size of output: 523 [2021-06-05 14:00:11,053 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 445 DAG size of output: 283 [2021-06-05 14:00:11,741 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 514 DAG size of output: 386 [2021-06-05 14:00:11,857 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 374 DAG size of output: 371 [2021-06-05 14:00:12,697 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 248 [2021-06-05 14:00:12,834 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 257 [2021-06-05 14:00:13,205 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 734 DAG size of output: 546 [2021-06-05 14:00:13,660 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 776 DAG size of output: 588 [2021-06-05 14:00:14,545 WARN L205 SmtUtils]: Spent 880.00 ms on a formula simplification. DAG size of input: 991 DAG size of output: 776 [2021-06-05 14:00:15,363 WARN L205 SmtUtils]: Spent 813.00 ms on a formula simplification. DAG size of input: 991 DAG size of output: 776 [2021-06-05 14:00:16,244 WARN L205 SmtUtils]: Spent 876.00 ms on a formula simplification. DAG size of input: 994 DAG size of output: 780 [2021-06-05 14:00:17,092 WARN L205 SmtUtils]: Spent 842.00 ms on a formula simplification. DAG size of input: 782 DAG size of output: 746 [2021-06-05 14:00:17,533 WARN L205 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 482 DAG size of output: 554 [2021-06-05 14:00:17,887 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 481 DAG size of output: 429 [2021-06-05 14:00:19,229 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 552 DAG size of output: 258 [2021-06-05 14:00:19,374 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 390 DAG size of output: 434 [2021-06-05 14:00:19,484 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 310 [2021-06-05 14:00:20,237 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 338 [2021-06-05 14:00:20,343 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 288 [2021-06-05 14:00:21,166 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 242 [2021-06-05 14:00:21,445 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 808 DAG size of output: 385 [2021-06-05 14:00:21,726 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 808 DAG size of output: 385 [2021-06-05 14:00:22,041 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 811 DAG size of output: 392 [2021-06-05 14:00:22,327 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 390 DAG size of output: 452 [2021-06-05 14:00:22,490 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 126 [2021-06-05 14:00:22,830 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 308 [2021-06-05 14:00:22,967 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 264 [2021-06-05 14:00:23,465 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 245 [2021-06-05 14:00:23,574 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 245 [2021-06-05 14:00:23,768 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 299 [2021-06-05 14:00:24,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:24,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:24,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:00:24,854 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 14:00:24,860 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 14:00:24,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470044403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:24,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:24,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-06-05 14:00:24,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128682022] [2021-06-05 14:00:24,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 14:00:24,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:24,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 14:00:24,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:00:24,861 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 14:00:25,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:25,253 INFO L93 Difference]: Finished difference Result 21460 states and 63374 transitions. [2021-06-05 14:00:25,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:00:25,254 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 14:00:25,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:25,288 INFO L225 Difference]: With dead ends: 21460 [2021-06-05 14:00:25,288 INFO L226 Difference]: Without dead ends: 21457 [2021-06-05 14:00:25,288 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 286.5ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:00:25,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21457 states. [2021-06-05 14:00:25,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21457 to 21256. [2021-06-05 14:00:25,581 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 14:00:25,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21256 states to 21256 states and 63069 transitions. [2021-06-05 14:00:25,628 INFO L78 Accepts]: Start accepts. Automaton has 21256 states and 63069 transitions. Word has length 24 [2021-06-05 14:00:25,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:25,629 INFO L482 AbstractCegarLoop]: Abstraction has 21256 states and 63069 transitions. [2021-06-05 14:00:25,629 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 14:00:25,629 INFO L276 IsEmpty]: Start isEmpty. Operand 21256 states and 63069 transitions. [2021-06-05 14:00:25,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:00:25,648 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:25,648 INFO L521 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:25,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7738,388 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:25,859 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:25,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:25,859 INFO L82 PathProgramCache]: Analyzing trace with hash 549194215, now seen corresponding path program 387 times [2021-06-05 14:00:25,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:25,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523398154] [2021-06-05 14:00:25,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:25,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:25,927 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 14:00:25,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:25,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523398154] [2021-06-05 14:00:25,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523398154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:25,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784078959] [2021-06-05 14:00:25,927 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 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 14:00:25,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 14:00:25,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:25,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:00:25,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:26,408 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 14:00:26,408 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:26,409 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 14:00:27,629 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 330 [2021-06-05 14:00:27,759 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 435 DAG size of output: 340 [2021-06-05 14:00:27,923 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 441 DAG size of output: 346 [2021-06-05 14:00:28,326 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 583 DAG size of output: 458 [2021-06-05 14:00:28,676 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 618 DAG size of output: 490 [2021-06-05 14:00:29,025 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 618 DAG size of output: 490 [2021-06-05 14:00:29,442 WARN L205 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 629 DAG size of output: 501 [2021-06-05 14:00:30,090 WARN L205 SmtUtils]: Spent 644.00 ms on a formula simplification. DAG size of input: 503 DAG size of output: 659 [2021-06-05 14:00:30,206 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 500 DAG size of output: 552 [2021-06-05 14:00:30,649 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 497 DAG size of output: 624 [2021-06-05 14:00:30,846 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 491 DAG size of output: 491 [2021-06-05 14:00:31,822 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 546 DAG size of output: 370 [2021-06-05 14:00:32,226 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 457 DAG size of output: 453 [2021-06-05 14:00:33,264 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 291 [2021-06-05 14:00:33,494 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 461 DAG size of output: 294 [2021-06-05 14:00:33,912 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 959 DAG size of output: 615 [2021-06-05 14:00:34,533 WARN L205 SmtUtils]: Spent 616.00 ms on a formula simplification. DAG size of input: 1122 DAG size of output: 703 [2021-06-05 14:00:35,194 WARN L205 SmtUtils]: Spent 655.00 ms on a formula simplification. DAG size of input: 1197 DAG size of output: 753 [2021-06-05 14:00:36,027 WARN L205 SmtUtils]: Spent 827.00 ms on a formula simplification. DAG size of input: 1412 DAG size of output: 864 [2021-06-05 14:00:36,897 WARN L205 SmtUtils]: Spent 863.00 ms on a formula simplification. DAG size of input: 1412 DAG size of output: 864 [2021-06-05 14:00:37,762 WARN L205 SmtUtils]: Spent 860.00 ms on a formula simplification. DAG size of input: 1418 DAG size of output: 870 [2021-06-05 14:00:38,745 WARN L205 SmtUtils]: Spent 975.00 ms on a formula simplification. DAG size of input: 872 DAG size of output: 996 [2021-06-05 14:00:39,038 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 450 DAG size of output: 236 [2021-06-05 14:00:39,508 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 258 [2021-06-05 14:00:40,487 WARN L205 SmtUtils]: Spent 973.00 ms on a formula simplification. DAG size of input: 814 DAG size of output: 794 [2021-06-05 14:00:41,024 WARN L205 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 508 DAG size of output: 519 [2021-06-05 14:00:41,534 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 410 [2021-06-05 14:00:41,713 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 220 [2021-06-05 14:00:42,040 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 394 DAG size of output: 238 [2021-06-05 14:00:42,376 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 344 [2021-06-05 14:00:42,821 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 462 DAG size of output: 266 [2021-06-05 14:00:43,110 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 696 DAG size of output: 386 [2021-06-05 14:00:43,563 WARN L205 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 863 DAG size of output: 462 [2021-06-05 14:00:44,012 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 863 DAG size of output: 462 [2021-06-05 14:00:44,581 WARN L205 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 869 DAG size of output: 469 [2021-06-05 14:00:44,986 WARN L205 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 471 DAG size of output: 413 [2021-06-05 14:00:45,320 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 385 [2021-06-05 14:00:45,479 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 256 [2021-06-05 14:00:46,168 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 199 [2021-06-05 14:00:47,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:00:47,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:47,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:00:47,145 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 14:00:47,151 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 14:00:47,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784078959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:47,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:47,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-06-05 14:00:47,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846858055] [2021-06-05 14:00:47,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 14:00:47,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:47,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 14:00:47,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:00:47,152 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 14:00:47,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:47,478 INFO L93 Difference]: Finished difference Result 21580 states and 63776 transitions. [2021-06-05 14:00:47,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:00:47,478 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 14:00:47,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:47,509 INFO L225 Difference]: With dead ends: 21580 [2021-06-05 14:00:47,509 INFO L226 Difference]: Without dead ends: 21577 [2021-06-05 14:00:47,509 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 282.8ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:00:47,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21577 states. [2021-06-05 14:00:47,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21577 to 21367. [2021-06-05 14:00:47,805 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 14:00:47,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21367 states to 21367 states and 63463 transitions. [2021-06-05 14:00:47,848 INFO L78 Accepts]: Start accepts. Automaton has 21367 states and 63463 transitions. Word has length 24 [2021-06-05 14:00:47,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:47,849 INFO L482 AbstractCegarLoop]: Abstraction has 21367 states and 63463 transitions. [2021-06-05 14:00:47,849 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 14:00:47,849 INFO L276 IsEmpty]: Start isEmpty. Operand 21367 states and 63463 transitions. [2021-06-05 14:00:47,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:00:47,866 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:47,866 INFO L521 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:48,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8931,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:48,067 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:48,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:48,067 INFO L82 PathProgramCache]: Analyzing trace with hash 275483695, now seen corresponding path program 388 times [2021-06-05 14:00:48,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:48,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141567647] [2021-06-05 14:00:48,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:48,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:48,134 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 14:00:48,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:48,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141567647] [2021-06-05 14:00:48,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141567647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:48,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125632201] [2021-06-05 14:00:48,135 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 14:00:48,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:00:48,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:48,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:00:48,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:48,608 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 14:00:48,609 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:00:48,609 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 14:00:49,457 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 258 [2021-06-05 14:00:49,673 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 278 [2021-06-05 14:00:49,827 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 431 DAG size of output: 299 [2021-06-05 14:00:49,982 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 431 DAG size of output: 299 [2021-06-05 14:00:50,167 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 446 DAG size of output: 314 [2021-06-05 14:00:50,395 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 354 [2021-06-05 14:00:50,524 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 210 [2021-06-05 14:00:51,473 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 213 [2021-06-05 14:00:51,838 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 254 [2021-06-05 14:00:52,075 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 436 DAG size of output: 347 [2021-06-05 14:00:52,525 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 501 DAG size of output: 387 [2021-06-05 14:00:52,709 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 253 DAG size of output: 321 [2021-06-05 14:00:52,961 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 246 [2021-06-05 14:00:54,063 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 203 [2021-06-05 14:00:54,188 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 206 [2021-06-05 14:00:54,328 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 265 [2021-06-05 14:00:54,507 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 282 [2021-06-05 14:00:54,718 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 263 [2021-06-05 14:00:55,041 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 515 DAG size of output: 374 [2021-06-05 14:00:55,800 WARN L205 SmtUtils]: Spent 756.00 ms on a formula simplification. DAG size of input: 853 DAG size of output: 595 [2021-06-05 14:00:56,416 WARN L205 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 853 DAG size of output: 595 [2021-06-05 14:00:57,121 WARN L205 SmtUtils]: Spent 702.00 ms on a formula simplification. DAG size of input: 860 DAG size of output: 602 [2021-06-05 14:00:57,872 WARN L205 SmtUtils]: Spent 746.00 ms on a formula simplification. DAG size of input: 604 DAG size of output: 658 [2021-06-05 14:00:58,348 WARN L205 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 457 DAG size of output: 529 [2021-06-05 14:00:58,858 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 201 [2021-06-05 14:00:59,137 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 326 [2021-06-05 14:00:59,781 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 464 DAG size of output: 306 [2021-06-05 14:01:00,160 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 460 [2021-06-05 14:01:00,345 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 280 [2021-06-05 14:01:00,945 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 209 [2021-06-05 14:01:01,181 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 289 [2021-06-05 14:01:01,889 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 189 [2021-06-05 14:01:02,050 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 313 [2021-06-05 14:01:02,420 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 828 DAG size of output: 494 [2021-06-05 14:01:02,794 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 828 DAG size of output: 494 [2021-06-05 14:01:03,210 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 830 DAG size of output: 497 [2021-06-05 14:01:03,679 WARN L205 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 499 DAG size of output: 540 [2021-06-05 14:01:03,956 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 227 [2021-06-05 14:01:04,228 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 252 [2021-06-05 14:01:04,414 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 433 DAG size of output: 318 [2021-06-05 14:01:04,603 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 433 DAG size of output: 318 [2021-06-05 14:01:04,819 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 438 DAG size of output: 324 [2021-06-05 14:01:04,935 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 342 [2021-06-05 14:01:05,126 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 348 [2021-06-05 14:01:05,974 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 434 DAG size of output: 294 [2021-06-05 14:01:06,166 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 434 DAG size of output: 294 [2021-06-05 14:01:06,330 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 439 DAG size of output: 241 [2021-06-05 14:01:06,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:06,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:06,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:01:06,444 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 14:01:06,450 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 14:01:06,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125632201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:06,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:06,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-06-05 14:01:06,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370924211] [2021-06-05 14:01:06,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 14:01:06,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:06,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 14:01:06,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:01:06,451 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 14:01:06,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:06,967 INFO L93 Difference]: Finished difference Result 21704 states and 64205 transitions. [2021-06-05 14:01:06,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:01:06,967 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 14:01:06,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:06,997 INFO L225 Difference]: With dead ends: 21704 [2021-06-05 14:01:06,997 INFO L226 Difference]: Without dead ends: 21701 [2021-06-05 14:01:06,997 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 286.9ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:01:07,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21701 states. [2021-06-05 14:01:07,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21701 to 21484. [2021-06-05 14:01:07,305 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 14:01:07,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21484 states to 21484 states and 63885 transitions. [2021-06-05 14:01:07,352 INFO L78 Accepts]: Start accepts. Automaton has 21484 states and 63885 transitions. Word has length 24 [2021-06-05 14:01:07,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:07,352 INFO L482 AbstractCegarLoop]: Abstraction has 21484 states and 63885 transitions. [2021-06-05 14:01:07,352 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 14:01:07,352 INFO L276 IsEmpty]: Start isEmpty. Operand 21484 states and 63885 transitions. [2021-06-05 14:01:07,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:01:07,372 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:07,372 INFO L521 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:07,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9870 [2021-06-05 14:01:07,573 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:07,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:07,573 INFO L82 PathProgramCache]: Analyzing trace with hash 380392167, now seen corresponding path program 389 times [2021-06-05 14:01:07,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:07,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367740826] [2021-06-05 14:01:07,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:07,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:07,641 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 14:01:07,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:07,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367740826] [2021-06-05 14:01:07,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367740826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:07,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260476617] [2021-06-05 14:01:07,641 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 14:01:07,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 14:01:07,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:07,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:01:07,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:08,120 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 14:01:08,121 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:08,121 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 14:01:08,959 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 429 DAG size of output: 315 [2021-06-05 14:01:09,142 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 452 DAG size of output: 339 [2021-06-05 14:01:09,925 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 580 DAG size of output: 425 [2021-06-05 14:01:10,249 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 601 DAG size of output: 445 [2021-06-05 14:01:10,622 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 621 DAG size of output: 466 [2021-06-05 14:01:10,996 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 621 DAG size of output: 466 [2021-06-05 14:01:11,456 WARN L205 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 636 DAG size of output: 481 [2021-06-05 14:01:11,988 WARN L205 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 483 DAG size of output: 611 [2021-06-05 14:01:12,498 WARN L205 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 477 DAG size of output: 605 [2021-06-05 14:01:12,681 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 330 [2021-06-05 14:01:14,162 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 260 [2021-06-05 14:01:14,308 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 271 [2021-06-05 14:01:14,620 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 470 DAG size of output: 386 [2021-06-05 14:01:14,982 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 506 DAG size of output: 423 [2021-06-05 14:01:15,855 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 125 [2021-06-05 14:01:16,229 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 309 DAG size of output: 263 [2021-06-05 14:01:16,435 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 286 [2021-06-05 14:01:16,684 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 444 DAG size of output: 344 [2021-06-05 14:01:17,014 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 490 DAG size of output: 380 [2021-06-05 14:01:17,896 WARN L205 SmtUtils]: Spent 879.00 ms on a formula simplification. DAG size of input: 850 DAG size of output: 662 [2021-06-05 14:01:18,977 WARN L205 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 976 DAG size of output: 744 [2021-06-05 14:01:20,445 WARN L205 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 1212 DAG size of output: 935 [2021-06-05 14:01:20,634 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 332 [2021-06-05 14:01:22,046 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 279 [2021-06-05 14:01:22,343 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 388 DAG size of output: 319 [2021-06-05 14:01:22,751 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 341 [2021-06-05 14:01:23,137 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 478 DAG size of output: 374 [2021-06-05 14:01:24,112 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 182 [2021-06-05 14:01:24,372 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 286 DAG size of output: 286 [2021-06-05 14:01:24,598 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 328 [2021-06-05 14:01:24,904 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 392 DAG size of output: 367 [2021-06-05 14:01:25,664 WARN L205 SmtUtils]: Spent 756.00 ms on a formula simplification. DAG size of input: 730 DAG size of output: 617 [2021-06-05 14:01:26,579 WARN L205 SmtUtils]: Spent 911.00 ms on a formula simplification. DAG size of input: 733 DAG size of output: 620 [2021-06-05 14:01:29,124 WARN L205 SmtUtils]: Spent 2.53 s on a formula simplification. DAG size of input: 1662 DAG size of output: 1295 [2021-06-05 14:01:31,623 WARN L205 SmtUtils]: Spent 2.49 s on a formula simplification. DAG size of input: 1662 DAG size of output: 1295 [2021-06-05 14:01:34,324 WARN L205 SmtUtils]: Spent 2.70 s on a formula simplification. DAG size of input: 1669 DAG size of output: 1302 [2021-06-05 14:01:37,595 WARN L205 SmtUtils]: Spent 3.26 s on a formula simplification. DAG size of input: 1304 DAG size of output: 1641 [2021-06-05 14:01:37,729 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 957 [2021-06-05 14:01:38,514 WARN L205 SmtUtils]: Spent 697.00 ms on a formula simplification. DAG size of input: 519 DAG size of output: 518 [2021-06-05 14:01:38,642 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 358 [2021-06-05 14:01:39,781 WARN L205 SmtUtils]: Spent 764.00 ms on a formula simplification. DAG size of input: 632 DAG size of output: 526 [2021-06-05 14:01:40,021 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 402 DAG size of output: 338 [2021-06-05 14:01:40,169 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 285 DAG size of output: 248 [2021-06-05 14:01:40,645 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 411 DAG size of output: 225 [2021-06-05 14:01:40,843 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 617 DAG size of output: 295 [2021-06-05 14:01:41,061 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 617 DAG size of output: 295 [2021-06-05 14:01:41,273 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 620 DAG size of output: 297 [2021-06-05 14:01:42,118 WARN L205 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 972 DAG size of output: 470 [2021-06-05 14:01:42,539 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 293 [2021-06-05 14:01:43,096 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 455 DAG size of output: 291 [2021-06-05 14:01:43,217 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 455 DAG size of output: 291 [2021-06-05 14:01:43,355 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 295 [2021-06-05 14:01:43,521 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 249 [2021-06-05 14:01:44,149 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:01:44,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:44,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:01:44,151 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 14:01:44,156 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 14:01:44,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260476617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:44,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:44,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-06-05 14:01:44,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993600845] [2021-06-05 14:01:44,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 14:01:44,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:44,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 14:01:44,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:01:44,157 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 14:01:44,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:44,640 INFO L93 Difference]: Finished difference Result 21935 states and 64985 transitions. [2021-06-05 14:01:44,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:01:44,640 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 14:01:44,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:44,672 INFO L225 Difference]: With dead ends: 21935 [2021-06-05 14:01:44,673 INFO L226 Difference]: Without dead ends: 21932 [2021-06-05 14:01:44,673 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 288.3ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:01:44,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21932 states. [2021-06-05 14:01:44,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21932 to 21709. [2021-06-05 14:01:45,004 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 14:01:45,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21709 states to 21709 states and 64669 transitions. [2021-06-05 14:01:45,057 INFO L78 Accepts]: Start accepts. Automaton has 21709 states and 64669 transitions. Word has length 24 [2021-06-05 14:01:45,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:45,057 INFO L482 AbstractCegarLoop]: Abstraction has 21709 states and 64669 transitions. [2021-06-05 14:01:45,057 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 14:01:45,058 INFO L276 IsEmpty]: Start isEmpty. Operand 21709 states and 64669 transitions. [2021-06-05 14:01:45,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:01:45,080 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:45,081 INFO L521 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:45,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 391 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11112 [2021-06-05 14:01:45,281 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:45,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:45,281 INFO L82 PathProgramCache]: Analyzing trace with hash -662412497, now seen corresponding path program 390 times [2021-06-05 14:01:45,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:45,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966320181] [2021-06-05 14:01:45,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:45,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:45,349 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 14:01:45,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:45,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966320181] [2021-06-05 14:01:45,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966320181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:45,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347403929] [2021-06-05 14:01:45,349 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 14:01:45,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:01:45,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:45,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:01:45,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:45,821 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 14:01:45,821 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:01:45,821 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 14:01:47,055 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 499 DAG size of output: 350 [2021-06-05 14:01:47,262 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 519 DAG size of output: 370 [2021-06-05 14:01:47,587 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 387 [2021-06-05 14:01:47,833 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 387 [2021-06-05 14:01:48,105 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 548 DAG size of output: 396 [2021-06-05 14:01:48,375 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 404 [2021-06-05 14:01:50,011 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 336 [2021-06-05 14:01:50,286 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 605 DAG size of output: 522 [2021-06-05 14:01:50,705 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 873 DAG size of output: 706 [2021-06-05 14:01:50,868 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 398 [2021-06-05 14:01:51,023 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 429 [2021-06-05 14:01:51,202 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 355 [2021-06-05 14:01:51,422 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 253 [2021-06-05 14:01:52,189 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 464 DAG size of output: 277 [2021-06-05 14:01:52,333 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 484 DAG size of output: 289 [2021-06-05 14:01:52,535 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 583 DAG size of output: 342 [2021-06-05 14:01:53,517 WARN L205 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 838 DAG size of output: 532 [2021-06-05 14:01:53,984 WARN L205 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 887 DAG size of output: 560 [2021-06-05 14:01:54,982 WARN L205 SmtUtils]: Spent 992.00 ms on a formula simplification. DAG size of input: 1676 DAG size of output: 1187 [2021-06-05 14:01:56,231 WARN L205 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 1712 DAG size of output: 1211 [2021-06-05 14:01:57,459 WARN L205 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 1712 DAG size of output: 1211 [2021-06-05 14:01:58,804 WARN L205 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 1718 DAG size of output: 1220 [2021-06-05 14:02:00,685 WARN L205 SmtUtils]: Spent 1.87 s on a formula simplification. DAG size of input: 1222 DAG size of output: 1489 [2021-06-05 14:02:03,014 WARN L205 SmtUtils]: Spent 2.32 s on a formula simplification. DAG size of input: 1124 DAG size of output: 1154 [2021-06-05 14:02:03,846 WARN L205 SmtUtils]: Spent 826.00 ms on a formula simplification. DAG size of input: 744 DAG size of output: 817 [2021-06-05 14:02:04,590 WARN L205 SmtUtils]: Spent 738.00 ms on a formula simplification. DAG size of input: 436 DAG size of output: 534 [2021-06-05 14:02:05,181 WARN L205 SmtUtils]: Spent 587.00 ms on a formula simplification. DAG size of input: 407 DAG size of output: 495 [2021-06-05 14:02:05,526 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 423 [2021-06-05 14:02:05,758 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 325 [2021-06-05 14:02:06,003 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 325 [2021-06-05 14:02:06,134 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 225 [2021-06-05 14:02:06,849 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 226 [2021-06-05 14:02:07,678 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 455 DAG size of output: 323 [2021-06-05 14:02:08,989 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 291 [2021-06-05 14:02:09,468 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 706 DAG size of output: 519 [2021-06-05 14:02:09,667 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 336 [2021-06-05 14:02:11,068 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 258 DAG size of output: 227 [2021-06-05 14:02:11,752 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 290 [2021-06-05 14:02:12,188 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 492 DAG size of output: 395 [2021-06-05 14:02:12,443 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 250 DAG size of output: 302 [2021-06-05 14:02:13,109 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 164 [2021-06-05 14:02:13,477 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 214 [2021-06-05 14:02:13,675 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 262 [2021-06-05 14:02:14,498 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 221 [2021-06-05 14:02:14,843 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 277 [2021-06-05 14:02:15,329 WARN L205 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 547 DAG size of output: 443 [2021-06-05 14:02:16,213 WARN L205 SmtUtils]: Spent 881.00 ms on a formula simplification. DAG size of input: 890 DAG size of output: 689 [2021-06-05 14:02:17,890 WARN L205 SmtUtils]: Spent 1.67 s on a formula simplification. DAG size of input: 1320 DAG size of output: 996 [2021-06-05 14:02:19,581 WARN L205 SmtUtils]: Spent 1.66 s on a formula simplification. DAG size of input: 1342 DAG size of output: 1007 [2021-06-05 14:02:21,597 WARN L205 SmtUtils]: Spent 2.01 s on a formula simplification. DAG size of input: 1463 DAG size of output: 1096 [2021-06-05 14:02:23,725 WARN L205 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 1605 DAG size of output: 1168 [2021-06-05 14:02:26,581 WARN L205 SmtUtils]: Spent 2.85 s on a formula simplification. DAG size of input: 1995 DAG size of output: 1476 [2021-06-05 14:02:30,153 WARN L205 SmtUtils]: Spent 3.56 s on a formula simplification. DAG size of input: 2414 DAG size of output: 1726 [2021-06-05 14:02:34,699 WARN L205 SmtUtils]: Spent 4.53 s on a formula simplification. DAG size of input: 2846 DAG size of output: 1951 [2021-06-05 14:02:39,161 WARN L205 SmtUtils]: Spent 4.45 s on a formula simplification. DAG size of input: 2846 DAG size of output: 1951 [2021-06-05 14:02:43,980 WARN L205 SmtUtils]: Spent 4.81 s on a formula simplification. DAG size of input: 2852 DAG size of output: 1957 [2021-06-05 14:02:50,317 WARN L205 SmtUtils]: Spent 6.32 s on a formula simplification. DAG size of input: 1959 DAG size of output: 2569 [2021-06-05 14:02:51,233 WARN L205 SmtUtils]: Spent 906.00 ms on a formula simplification. DAG size of input: 1698 DAG size of output: 808 [2021-06-05 14:02:51,668 WARN L205 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 488 DAG size of output: 452 [2021-06-05 14:02:52,262 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 379 DAG size of output: 232 [2021-06-05 14:02:52,544 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 682 DAG size of output: 377 [2021-06-05 14:02:53,773 WARN L205 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 1785 DAG size of output: 947 [2021-06-05 14:02:54,976 WARN L205 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 1785 DAG size of output: 947 [2021-06-05 14:02:56,250 WARN L205 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 1790 DAG size of output: 952 [2021-06-05 14:02:56,762 WARN L205 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 676 DAG size of output: 433 [2021-06-05 14:02:57,915 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 378 [2021-06-05 14:02:58,639 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 255 [2021-06-05 14:02:58,769 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 255 [2021-06-05 14:02:58,913 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 259 [2021-06-05 14:02:59,033 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 257 [2021-06-05 14:02:59,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:02:59,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:02:59,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:02:59,317 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 14:02:59,323 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 14:02:59,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347403929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:59,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:59,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-06-05 14:02:59,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598587101] [2021-06-05 14:02:59,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 14:02:59,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:59,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 14:02:59,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:02:59,323 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 14:02:59,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:59,704 INFO L93 Difference]: Finished difference Result 22176 states and 65792 transitions. [2021-06-05 14:02:59,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:02:59,704 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 14:02:59,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:59,734 INFO L225 Difference]: With dead ends: 22176 [2021-06-05 14:02:59,734 INFO L226 Difference]: Without dead ends: 22173 [2021-06-05 14:02:59,734 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 286.9ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:02:59,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22173 states. [2021-06-05 14:02:59,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22173 to 21946. [2021-06-05 14:03:00,021 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 14:03:00,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21946 states to 21946 states and 65478 transitions. [2021-06-05 14:03:00,065 INFO L78 Accepts]: Start accepts. Automaton has 21946 states and 65478 transitions. Word has length 24 [2021-06-05 14:03:00,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:00,066 INFO L482 AbstractCegarLoop]: Abstraction has 21946 states and 65478 transitions. [2021-06-05 14:03:00,066 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 14:03:00,066 INFO L276 IsEmpty]: Start isEmpty. Operand 21946 states and 65478 transitions. [2021-06-05 14:03:00,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:03:00,085 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:00,085 INFO L521 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:00,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12515 [2021-06-05 14:03:00,285 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:00,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:00,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1370381287, now seen corresponding path program 391 times [2021-06-05 14:03:00,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:00,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714907459] [2021-06-05 14:03:00,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:00,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:00,353 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 14:03:00,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:00,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714907459] [2021-06-05 14:03:00,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714907459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:00,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194280930] [2021-06-05 14:03:00,353 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 14:03:00,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:00,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:03:00,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:00,814 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 14:03:00,814 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:00,814 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 14:03:01,624 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 143 [2021-06-05 14:03:02,119 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 254 [2021-06-05 14:03:02,269 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 274 [2021-06-05 14:03:02,524 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 479 DAG size of output: 335 [2021-06-05 14:03:02,778 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 479 DAG size of output: 335 [2021-06-05 14:03:03,078 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 494 DAG size of output: 351 [2021-06-05 14:03:03,732 WARN L205 SmtUtils]: Spent 650.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 422 [2021-06-05 14:03:04,593 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 197 [2021-06-05 14:03:04,719 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 200 [2021-06-05 14:03:04,876 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 213 [2021-06-05 14:03:05,068 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 234 [2021-06-05 14:03:05,815 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 242 [2021-06-05 14:03:06,133 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 330 [2021-06-05 14:03:06,361 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 370 [2021-06-05 14:03:06,774 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 369 [2021-06-05 14:03:07,427 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 241 [2021-06-05 14:03:07,664 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 246 [2021-06-05 14:03:08,252 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 184 [2021-06-05 14:03:08,497 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 234 [2021-06-05 14:03:09,072 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 240 [2021-06-05 14:03:09,340 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 448 DAG size of output: 332 [2021-06-05 14:03:09,782 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 535 DAG size of output: 401 [2021-06-05 14:03:10,208 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 598 DAG size of output: 461 [2021-06-05 14:03:10,713 WARN L205 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 693 DAG size of output: 515 [2021-06-05 14:03:11,711 WARN L205 SmtUtils]: Spent 994.00 ms on a formula simplification. DAG size of input: 847 DAG size of output: 607 [2021-06-05 14:03:12,815 WARN L205 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 901 DAG size of output: 655 [2021-06-05 14:03:14,390 WARN L205 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 1179 DAG size of output: 795 [2021-06-05 14:03:15,973 WARN L205 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 1179 DAG size of output: 795 [2021-06-05 14:03:17,726 WARN L205 SmtUtils]: Spent 1.75 s on a formula simplification. DAG size of input: 1190 DAG size of output: 806 [2021-06-05 14:03:18,854 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 804 DAG size of output: 823 [2021-06-05 14:03:19,581 WARN L205 SmtUtils]: Spent 721.00 ms on a formula simplification. DAG size of input: 665 DAG size of output: 637 [2021-06-05 14:03:20,339 WARN L205 SmtUtils]: Spent 753.00 ms on a formula simplification. DAG size of input: 532 DAG size of output: 651 [2021-06-05 14:03:20,901 WARN L205 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 422 DAG size of output: 488 [2021-06-05 14:03:21,223 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 402 DAG size of output: 271 [2021-06-05 14:03:21,432 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 307 [2021-06-05 14:03:21,858 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 537 DAG size of output: 360 [2021-06-05 14:03:22,266 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 468 [2021-06-05 14:03:22,817 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 266 [2021-06-05 14:03:22,952 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 220 [2021-06-05 14:03:23,318 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 332 [2021-06-05 14:03:23,743 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 838 DAG size of output: 516 [2021-06-05 14:03:24,334 WARN L205 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 935 DAG size of output: 579 [2021-06-05 14:03:24,560 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 246 [2021-06-05 14:03:24,818 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 204 [2021-06-05 14:03:25,704 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 190 [2021-06-05 14:03:26,424 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 249 [2021-06-05 14:03:26,693 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 258 [2021-06-05 14:03:27,421 WARN L205 SmtUtils]: Spent 726.00 ms on a formula simplification. DAG size of input: 1137 DAG size of output: 684 [2021-06-05 14:03:28,154 WARN L205 SmtUtils]: Spent 727.00 ms on a formula simplification. DAG size of input: 1137 DAG size of output: 684 [2021-06-05 14:03:29,274 WARN L205 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 1143 DAG size of output: 758 [2021-06-05 14:03:29,736 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 549 DAG size of output: 437 [2021-06-05 14:03:30,040 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 433 DAG size of output: 377 [2021-06-05 14:03:30,644 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 379 DAG size of output: 242 [2021-06-05 14:03:31,005 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 811 DAG size of output: 479 [2021-06-05 14:03:31,366 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 811 DAG size of output: 479 [2021-06-05 14:03:31,760 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 813 DAG size of output: 481 [2021-06-05 14:03:32,178 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 483 DAG size of output: 569 [2021-06-05 14:03:32,442 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 475 DAG size of output: 394 [2021-06-05 14:03:32,582 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 260 [2021-06-05 14:03:32,885 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 320 [2021-06-05 14:03:33,636 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 560 DAG size of output: 246 [2021-06-05 14:03:33,771 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 560 DAG size of output: 246 [2021-06-05 14:03:33,922 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 564 DAG size of output: 250 [2021-06-05 14:03:34,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:34,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:34,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:03:34,127 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 14:03:34,133 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 14:03:34,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194280930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:34,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:34,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-06-05 14:03:34,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078448314] [2021-06-05 14:03:34,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 14:03:34,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:34,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 14:03:34,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:03:34,134 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 14:03:34,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:34,562 INFO L93 Difference]: Finished difference Result 23670 states and 70444 transitions. [2021-06-05 14:03:34,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:03:34,562 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 14:03:34,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:34,600 INFO L225 Difference]: With dead ends: 23670 [2021-06-05 14:03:34,600 INFO L226 Difference]: Without dead ends: 23667 [2021-06-05 14:03:34,600 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 281.8ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:03:34,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23667 states. [2021-06-05 14:03:34,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23667 to 23451. [2021-06-05 14:03:34,924 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 14:03:34,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23451 states to 23451 states and 70158 transitions. [2021-06-05 14:03:34,978 INFO L78 Accepts]: Start accepts. Automaton has 23451 states and 70158 transitions. Word has length 24 [2021-06-05 14:03:34,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:34,978 INFO L482 AbstractCegarLoop]: Abstraction has 23451 states and 70158 transitions. [2021-06-05 14:03:34,978 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 14:03:34,978 INFO L276 IsEmpty]: Start isEmpty. Operand 23451 states and 70158 transitions. [2021-06-05 14:03:34,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:03:35,000 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:35,000 INFO L521 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:35,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15472,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:35,200 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:35,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:35,201 INFO L82 PathProgramCache]: Analyzing trace with hash -37520849, now seen corresponding path program 392 times [2021-06-05 14:03:35,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:35,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15948120] [2021-06-05 14:03:35,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:35,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:35,283 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 14:03:35,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:35,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15948120] [2021-06-05 14:03:35,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15948120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:35,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674213647] [2021-06-05 14:03:35,283 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 14:03:35,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:03:35,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:35,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:03:35,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:35,749 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 14:03:35,750 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:35,750 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 14:03:36,577 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 276 [2021-06-05 14:03:36,690 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 276 [2021-06-05 14:03:36,824 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 291 [2021-06-05 14:03:37,047 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 288 [2021-06-05 14:03:37,183 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 282 [2021-06-05 14:03:37,377 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 254 [2021-06-05 14:03:38,501 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 198 [2021-06-05 14:03:38,713 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 271 [2021-06-05 14:03:39,156 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 381 DAG size of output: 315 [2021-06-05 14:03:39,540 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 411 DAG size of output: 341 [2021-06-05 14:03:40,032 WARN L205 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 450 DAG size of output: 369 [2021-06-05 14:03:40,534 WARN L205 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 376 [2021-06-05 14:03:41,130 WARN L205 SmtUtils]: Spent 593.00 ms on a formula simplification. DAG size of input: 492 DAG size of output: 399 [2021-06-05 14:03:41,319 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 223 [2021-06-05 14:03:41,931 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 131 [2021-06-05 14:03:42,839 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 240 [2021-06-05 14:03:43,084 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 306 [2021-06-05 14:03:43,404 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 545 DAG size of output: 356 [2021-06-05 14:03:43,819 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 619 DAG size of output: 423 [2021-06-05 14:03:44,373 WARN L205 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 626 DAG size of output: 430 [2021-06-05 14:03:44,969 WARN L205 SmtUtils]: Spent 593.00 ms on a formula simplification. DAG size of input: 670 DAG size of output: 466 [2021-06-05 14:03:45,668 WARN L205 SmtUtils]: Spent 696.00 ms on a formula simplification. DAG size of input: 709 DAG size of output: 496 [2021-06-05 14:03:47,089 WARN L205 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 1004 DAG size of output: 698 [2021-06-05 14:03:48,732 WARN L205 SmtUtils]: Spent 1.64 s on a formula simplification. DAG size of input: 1052 DAG size of output: 715 [2021-06-05 14:03:50,308 WARN L205 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 1052 DAG size of output: 715 [2021-06-05 14:03:51,998 WARN L205 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 1059 DAG size of output: 722 [2021-06-05 14:03:52,800 WARN L205 SmtUtils]: Spent 796.00 ms on a formula simplification. DAG size of input: 724 DAG size of output: 433 [2021-06-05 14:03:53,184 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 408 DAG size of output: 342 [2021-06-05 14:03:53,456 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 332 [2021-06-05 14:03:53,707 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 238 [2021-06-05 14:03:54,322 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 231 [2021-06-05 14:03:54,446 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 231 [2021-06-05 14:03:54,576 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 374 DAG size of output: 231 [2021-06-05 14:03:55,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:03:55,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:55,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:03:55,051 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 14:03:55,057 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 14:03:55,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674213647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:55,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:03:55,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-06-05 14:03:55,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132672785] [2021-06-05 14:03:55,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 14:03:55,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:03:55,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 14:03:55,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:03:55,058 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 14:03:55,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:03:55,409 INFO L93 Difference]: Finished difference Result 29480 states and 87930 transitions. [2021-06-05 14:03:55,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:03:55,409 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 14:03:55,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:03:55,454 INFO L225 Difference]: With dead ends: 29480 [2021-06-05 14:03:55,454 INFO L226 Difference]: Without dead ends: 29477 [2021-06-05 14:03:55,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 290.5ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:03:55,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29477 states. [2021-06-05 14:03:56,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29477 to 29259. [2021-06-05 14:03:56,031 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 14:03:56,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29259 states to 29259 states and 87652 transitions. [2021-06-05 14:03:56,107 INFO L78 Accepts]: Start accepts. Automaton has 29259 states and 87652 transitions. Word has length 24 [2021-06-05 14:03:56,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:03:56,107 INFO L482 AbstractCegarLoop]: Abstraction has 29259 states and 87652 transitions. [2021-06-05 14:03:56,108 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 14:03:56,108 INFO L276 IsEmpty]: Start isEmpty. Operand 29259 states and 87652 transitions. [2021-06-05 14:03:56,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:03:56,136 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:03:56,136 INFO L521 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:03:56,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16711,394 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:03:56,336 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:03:56,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:03:56,339 INFO L82 PathProgramCache]: Analyzing trace with hash -732814105, now seen corresponding path program 393 times [2021-06-05 14:03:56,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:03:56,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216216199] [2021-06-05 14:03:56,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:03:56,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:03:56,407 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 14:03:56,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:03:56,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216216199] [2021-06-05 14:03:56,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216216199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:03:56,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234339010] [2021-06-05 14:03:56,408 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 14:03:56,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 14:03:56,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:03:56,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 14:03:56,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:03:56,878 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 14:03:56,879 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:03:56,879 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 14:03:57,478 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 343 [2021-06-05 14:03:57,618 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 351 [2021-06-05 14:03:58,236 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 336 [2021-06-05 14:03:58,552 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 614 DAG size of output: 559 [2021-06-05 14:03:59,225 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 309 [2021-06-05 14:03:59,835 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 336 [2021-06-05 14:04:00,102 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 577 DAG size of output: 525 [2021-06-05 14:04:00,899 WARN L205 SmtUtils]: Spent 793.00 ms on a formula simplification. DAG size of input: 1056 DAG size of output: 946 [2021-06-05 14:04:01,481 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 390 DAG size of output: 353 [2021-06-05 14:04:01,607 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 370 [2021-06-05 14:04:02,402 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 665 DAG size of output: 595 [2021-06-05 14:04:02,818 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 196 [2021-06-05 14:04:03,274 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 438 DAG size of output: 400 [2021-06-05 14:04:03,443 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 456 DAG size of output: 414 [2021-06-05 14:04:04,021 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 390 DAG size of output: 353 [2021-06-05 14:04:04,147 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 369 [2021-06-05 14:04:04,509 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 749 DAG size of output: 666 [2021-06-05 14:04:05,516 WARN L205 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 1296 DAG size of output: 1127 [2021-06-05 14:04:07,325 WARN L205 SmtUtils]: Spent 1.80 s on a formula simplification. DAG size of input: 2221 DAG size of output: 1934 [2021-06-05 14:04:09,069 WARN L205 SmtUtils]: Spent 1.73 s on a formula simplification. DAG size of input: 2221 DAG size of output: 1934 [2021-06-05 14:04:11,079 WARN L205 SmtUtils]: Spent 2.00 s on a formula simplification. DAG size of input: 2236 DAG size of output: 1949 [2021-06-05 14:04:12,160 WARN L205 SmtUtils]: Spent 982.00 ms on a formula simplification. DAG size of input: 1943 DAG size of output: 1870 [2021-06-05 14:04:12,608 WARN L205 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 953 DAG size of output: 1006 [2021-06-05 14:04:13,552 WARN L205 SmtUtils]: Spent 938.00 ms on a formula simplification. DAG size of input: 946 DAG size of output: 1093 [2021-06-05 14:04:14,227 WARN L205 SmtUtils]: Spent 667.00 ms on a formula simplification. DAG size of input: 888 DAG size of output: 792 [2021-06-05 14:04:14,501 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 766 DAG size of output: 748 [2021-06-05 14:04:14,768 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 450 DAG size of output: 450 [2021-06-05 14:04:14,970 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 329 [2021-06-05 14:04:15,572 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 344 [2021-06-05 14:04:15,681 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 278 [2021-06-05 14:04:16,438 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 537 DAG size of output: 317 [2021-06-05 14:04:16,637 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 556 DAG size of output: 335 [2021-06-05 14:04:17,860 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 450 DAG size of output: 267 [2021-06-05 14:04:18,234 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 880 DAG size of output: 518 [2021-06-05 14:04:18,703 WARN L205 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 911 DAG size of output: 550 [2021-06-05 14:04:19,478 WARN L205 SmtUtils]: Spent 771.00 ms on a formula simplification. DAG size of input: 1111 DAG size of output: 698 [2021-06-05 14:04:20,306 WARN L205 SmtUtils]: Spent 822.00 ms on a formula simplification. DAG size of input: 1185 DAG size of output: 735 [2021-06-05 14:04:20,566 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 1039 DAG size of output: 1023 [2021-06-05 14:04:21,065 WARN L205 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 616 DAG size of output: 721 [2021-06-05 14:04:21,281 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 395 [2021-06-05 14:04:21,524 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 361 [2021-06-05 14:04:21,742 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 383 [2021-06-05 14:04:22,456 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 456 DAG size of output: 283 [2021-06-05 14:04:22,609 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 290 [2021-06-05 14:04:22,740 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 327 [2021-06-05 14:04:23,600 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 742 DAG size of output: 394 [2021-06-05 14:04:24,046 WARN L205 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 895 DAG size of output: 523 [2021-06-05 14:04:24,394 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 513 DAG size of output: 598 [2021-06-05 14:04:24,661 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 486 DAG size of output: 497 [2021-06-05 14:04:24,811 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 310 [2021-06-05 14:04:24,922 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 328 [2021-06-05 14:04:26,009 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 600 DAG size of output: 342 [2021-06-05 14:04:26,620 WARN L205 SmtUtils]: Spent 607.00 ms on a formula simplification. DAG size of input: 1295 DAG size of output: 662 [2021-06-05 14:04:28,451 WARN L205 SmtUtils]: Spent 1.83 s on a formula simplification. DAG size of input: 2272 DAG size of output: 1239 [2021-06-05 14:04:30,156 WARN L205 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 2272 DAG size of output: 1239 [2021-06-05 14:04:32,221 WARN L205 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 2280 DAG size of output: 1250 [2021-06-05 14:04:33,383 WARN L205 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 1141 DAG size of output: 1073 [2021-06-05 14:04:34,057 WARN L205 SmtUtils]: Spent 667.00 ms on a formula simplification. DAG size of input: 1038 DAG size of output: 977 [2021-06-05 14:04:34,237 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 437 [2021-06-05 14:04:35,852 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 344 [2021-06-05 14:04:36,119 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 923 DAG size of output: 404 [2021-06-05 14:04:36,462 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 947 DAG size of output: 425 [2021-06-05 14:04:36,977 WARN L205 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 1093 DAG size of output: 539 [2021-06-05 14:04:37,481 WARN L205 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 1093 DAG size of output: 539 [2021-06-05 14:04:38,059 WARN L205 SmtUtils]: Spent 575.00 ms on a formula simplification. DAG size of input: 1097 DAG size of output: 547 [2021-06-05 14:04:39,049 WARN L205 SmtUtils]: Spent 985.00 ms on a formula simplification. DAG size of input: 549 DAG size of output: 644 [2021-06-05 14:04:39,882 WARN L205 SmtUtils]: Spent 829.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 503 [2021-06-05 14:04:40,773 WARN L205 SmtUtils]: Spent 887.00 ms on a formula simplification. DAG size of input: 466 DAG size of output: 558 [2021-06-05 14:04:40,992 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 342 [2021-06-05 14:04:41,242 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 288 [2021-06-05 14:04:42,286 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 405 DAG size of output: 322 [2021-06-05 14:04:42,489 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 304 [2021-06-05 14:04:42,648 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 255 [2021-06-05 14:04:43,366 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 187 [2021-06-05 14:04:43,693 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 684 DAG size of output: 420 [2021-06-05 14:04:44,495 WARN L205 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 846 DAG size of output: 494 [2021-06-05 14:04:44,999 WARN L205 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 973 DAG size of output: 581 [2021-06-05 14:04:45,495 WARN L205 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 973 DAG size of output: 581 [2021-06-05 14:04:46,049 WARN L205 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 975 DAG size of output: 581 [2021-06-05 14:04:46,405 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 580 DAG size of output: 515 [2021-06-05 14:04:46,690 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 410 DAG size of output: 351 [2021-06-05 14:04:47,286 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 228 [2021-06-05 14:04:47,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:04:47,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:04:47,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:04:47,520 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 14:04:47,526 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 14:04:47,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234339010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:47,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:47,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-06-05 14:04:47,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056651661] [2021-06-05 14:04:47,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 14:04:47,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:47,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 14:04:47,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:04:47,527 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 14:04:47,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:47,954 INFO L93 Difference]: Finished difference Result 34712 states and 103669 transitions. [2021-06-05 14:04:47,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:04:47,954 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 14:04:47,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:48,005 INFO L225 Difference]: With dead ends: 34712 [2021-06-05 14:04:48,005 INFO L226 Difference]: Without dead ends: 34709 [2021-06-05 14:04:48,006 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 290.0ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:04:48,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34709 states. [2021-06-05 14:04:48,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34709 to 34499. [2021-06-05 14:04:48,504 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 14:04:48,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34499 states to 34499 states and 103403 transitions. [2021-06-05 14:04:48,571 INFO L78 Accepts]: Start accepts. Automaton has 34499 states and 103403 transitions. Word has length 24 [2021-06-05 14:04:48,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:48,571 INFO L482 AbstractCegarLoop]: Abstraction has 34499 states and 103403 transitions. [2021-06-05 14:04:48,571 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 14:04:48,571 INFO L276 IsEmpty]: Start isEmpty. Operand 34499 states and 103403 transitions. [2021-06-05 14:04:48,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:04:48,601 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:48,601 INFO L521 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:48,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17630,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:48,802 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:48,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:48,802 INFO L82 PathProgramCache]: Analyzing trace with hash -569566705, now seen corresponding path program 394 times [2021-06-05 14:04:48,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:48,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822664802] [2021-06-05 14:04:48,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:48,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:48,916 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 14:04:48,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:48,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822664802] [2021-06-05 14:04:48,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822664802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:48,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306779672] [2021-06-05 14:04:48,916 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 14:04:48,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:04:48,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:48,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:04:48,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:48,994 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 14:04:48,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306779672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:48,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:48,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-05 14:04:48,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236535309] [2021-06-05 14:04:48,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:04:48,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:48,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:04:48,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:04:48,995 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 14:04:49,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:49,306 INFO L93 Difference]: Finished difference Result 34720 states and 103729 transitions. [2021-06-05 14:04:49,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:04:49,307 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 14:04:49,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:49,355 INFO L225 Difference]: With dead ends: 34720 [2021-06-05 14:04:49,355 INFO L226 Difference]: Without dead ends: 34720 [2021-06-05 14:04:49,355 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 234.0ms TimeCoverageRelationStatistics Valid=412, Invalid=848, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 14:04:49,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34720 states. [2021-06-05 14:04:49,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34720 to 34459. [2021-06-05 14:04:49,809 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 14:04:49,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34459 states to 34459 states and 103272 transitions. [2021-06-05 14:04:49,880 INFO L78 Accepts]: Start accepts. Automaton has 34459 states and 103272 transitions. Word has length 25 [2021-06-05 14:04:49,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:49,880 INFO L482 AbstractCegarLoop]: Abstraction has 34459 states and 103272 transitions. [2021-06-05 14:04:49,880 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 14:04:49,880 INFO L276 IsEmpty]: Start isEmpty. Operand 34459 states and 103272 transitions. [2021-06-05 14:04:49,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:04:49,911 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:49,911 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:50,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20196,396 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:50,112 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:50,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:50,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1490602554, now seen corresponding path program 395 times [2021-06-05 14:04:50,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:50,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098587563] [2021-06-05 14:04:50,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:50,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:50,226 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 14:04:50,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:50,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098587563] [2021-06-05 14:04:50,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098587563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:50,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367896806] [2021-06-05 14:04:50,227 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 14:04:50,255 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:04:50,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:50,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:04:50,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:50,301 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 14:04:50,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367896806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:50,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:50,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-05 14:04:50,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469173584] [2021-06-05 14:04:50,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:04:50,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:50,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:04:50,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:04:50,302 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 14:04:50,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:50,754 INFO L93 Difference]: Finished difference Result 35093 states and 104240 transitions. [2021-06-05 14:04:50,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 14:04:50,755 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 14:04:50,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:50,806 INFO L225 Difference]: With dead ends: 35093 [2021-06-05 14:04:50,806 INFO L226 Difference]: Without dead ends: 35080 [2021-06-05 14:04:50,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 292.6ms TimeCoverageRelationStatistics Valid=542, Invalid=1098, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 14:04:50,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35080 states. [2021-06-05 14:04:51,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35080 to 34497. [2021-06-05 14:04:51,281 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 14:04:51,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34497 states to 34497 states and 103356 transitions. [2021-06-05 14:04:51,353 INFO L78 Accepts]: Start accepts. Automaton has 34497 states and 103356 transitions. Word has length 25 [2021-06-05 14:04:51,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:51,353 INFO L482 AbstractCegarLoop]: Abstraction has 34497 states and 103356 transitions. [2021-06-05 14:04:51,353 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 14:04:51,353 INFO L276 IsEmpty]: Start isEmpty. Operand 34497 states and 103356 transitions. [2021-06-05 14:04:51,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:04:51,387 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:51,387 INFO L521 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:51,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20197 [2021-06-05 14:04:51,587 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:51,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:51,588 INFO L82 PathProgramCache]: Analyzing trace with hash -446698831, now seen corresponding path program 396 times [2021-06-05 14:04:51,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:51,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390425477] [2021-06-05 14:04:51,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:51,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:51,667 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 14:04:51,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:51,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390425477] [2021-06-05 14:04:51,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390425477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:51,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943046803] [2021-06-05 14:04:51,667 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 14:04:51,694 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 14:04:51,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:51,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:04:51,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:51,733 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 14:04:51,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943046803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:51,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:51,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:04:51,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621996341] [2021-06-05 14:04:51,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:04:51,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:51,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:04:51,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:04:51,734 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 14:04:51,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:51,989 INFO L93 Difference]: Finished difference Result 34544 states and 103423 transitions. [2021-06-05 14:04:51,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:04:51,989 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 14:04:51,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:52,038 INFO L225 Difference]: With dead ends: 34544 [2021-06-05 14:04:52,038 INFO L226 Difference]: Without dead ends: 34543 [2021-06-05 14:04:52,038 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 129.0ms TimeCoverageRelationStatistics Valid=237, Invalid=413, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:04:52,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34543 states. [2021-06-05 14:04:52,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34543 to 34497. [2021-06-05 14:04:52,506 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 14:04:52,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34497 states to 34497 states and 103354 transitions. [2021-06-05 14:04:52,576 INFO L78 Accepts]: Start accepts. Automaton has 34497 states and 103354 transitions. Word has length 25 [2021-06-05 14:04:52,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:52,576 INFO L482 AbstractCegarLoop]: Abstraction has 34497 states and 103354 transitions. [2021-06-05 14:04:52,576 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 14:04:52,576 INFO L276 IsEmpty]: Start isEmpty. Operand 34497 states and 103354 transitions. [2021-06-05 14:04:52,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:04:52,610 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:52,611 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:52,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20198,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:04:52,811 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:52,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:52,811 INFO L82 PathProgramCache]: Analyzing trace with hash 470357522, now seen corresponding path program 397 times [2021-06-05 14:04:52,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:52,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878699465] [2021-06-05 14:04:52,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:52,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:52,886 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 14:04:52,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:52,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878699465] [2021-06-05 14:04:52,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878699465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:52,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711199387] [2021-06-05 14:04:52,886 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 14:04:52,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:52,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:04:52,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:52,956 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 14:04:52,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711199387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:52,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:52,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:04:52,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754778352] [2021-06-05 14:04:52,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:04:52,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:52,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:04:52,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:04:52,957 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 14:04:53,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:53,125 INFO L93 Difference]: Finished difference Result 35864 states and 106497 transitions. [2021-06-05 14:04:53,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:04:53,130 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 14:04:53,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:53,191 INFO L225 Difference]: With dead ends: 35864 [2021-06-05 14:04:53,191 INFO L226 Difference]: Without dead ends: 35864 [2021-06-05 14:04:53,191 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 74.9ms TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:04:53,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35864 states. [2021-06-05 14:04:53,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35864 to 34468. [2021-06-05 14:04:53,863 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 14:04:53,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34468 states to 34468 states and 103246 transitions. [2021-06-05 14:04:53,935 INFO L78 Accepts]: Start accepts. Automaton has 34468 states and 103246 transitions. Word has length 25 [2021-06-05 14:04:53,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:53,935 INFO L482 AbstractCegarLoop]: Abstraction has 34468 states and 103246 transitions. [2021-06-05 14:04:53,935 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 14:04:53,935 INFO L276 IsEmpty]: Start isEmpty. Operand 34468 states and 103246 transitions. [2021-06-05 14:04:53,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:04:53,967 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:53,967 INFO L521 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:54,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20199 [2021-06-05 14:04:54,168 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:54,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:54,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1195948281, now seen corresponding path program 398 times [2021-06-05 14:04:54,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:54,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760805094] [2021-06-05 14:04:54,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:54,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:54,242 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 14:04:54,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:54,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760805094] [2021-06-05 14:04:54,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760805094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:54,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293527133] [2021-06-05 14:04:54,243 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 14:04:54,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:04:54,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:54,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:04:54,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:54,313 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 14:04:54,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293527133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:54,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:54,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:04:54,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134492037] [2021-06-05 14:04:54,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:04:54,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:54,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:04:54,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:04:54,314 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 14:04:54,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:54,559 INFO L93 Difference]: Finished difference Result 34958 states and 104173 transitions. [2021-06-05 14:04:54,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:04:54,560 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 14:04:54,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:54,619 INFO L225 Difference]: With dead ends: 34958 [2021-06-05 14:04:54,620 INFO L226 Difference]: Without dead ends: 34958 [2021-06-05 14:04:54,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 120.7ms TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:04:54,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34958 states. [2021-06-05 14:04:55,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34958 to 34515. [2021-06-05 14:04:55,094 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 14:04:55,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34515 states to 34515 states and 103391 transitions. [2021-06-05 14:04:55,164 INFO L78 Accepts]: Start accepts. Automaton has 34515 states and 103391 transitions. Word has length 25 [2021-06-05 14:04:55,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:55,164 INFO L482 AbstractCegarLoop]: Abstraction has 34515 states and 103391 transitions. [2021-06-05 14:04:55,164 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 14:04:55,164 INFO L276 IsEmpty]: Start isEmpty. Operand 34515 states and 103391 transitions. [2021-06-05 14:04:55,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:04:55,195 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:55,195 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:55,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20200 [2021-06-05 14:04:55,395 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:55,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:55,396 INFO L82 PathProgramCache]: Analyzing trace with hash -251186298, now seen corresponding path program 399 times [2021-06-05 14:04:55,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:55,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088148708] [2021-06-05 14:04:55,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:55,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:55,465 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 14:04:55,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:55,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088148708] [2021-06-05 14:04:55,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088148708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:55,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227260540] [2021-06-05 14:04:55,465 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 14:04:55,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:04:55,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:55,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:04:55,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:55,532 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 14:04:55,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227260540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:55,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:55,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:04:55,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471293118] [2021-06-05 14:04:55,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:04:55,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:55,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:04:55,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:04:55,532 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 14:04:55,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:55,792 INFO L93 Difference]: Finished difference Result 35079 states and 104228 transitions. [2021-06-05 14:04:55,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:04:55,792 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 14:04:55,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:55,850 INFO L225 Difference]: With dead ends: 35079 [2021-06-05 14:04:55,850 INFO L226 Difference]: Without dead ends: 35077 [2021-06-05 14:04:55,850 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 137.5ms TimeCoverageRelationStatistics Valid=246, Invalid=404, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:04:55,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35077 states. [2021-06-05 14:04:56,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35077 to 34527. [2021-06-05 14:04:56,325 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 14:04:56,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34527 states to 34527 states and 103434 transitions. [2021-06-05 14:04:56,396 INFO L78 Accepts]: Start accepts. Automaton has 34527 states and 103434 transitions. Word has length 25 [2021-06-05 14:04:56,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:56,397 INFO L482 AbstractCegarLoop]: Abstraction has 34527 states and 103434 transitions. [2021-06-05 14:04:56,397 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 14:04:56,397 INFO L276 IsEmpty]: Start isEmpty. Operand 34527 states and 103434 transitions. [2021-06-05 14:04:56,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:04:56,428 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:56,428 INFO L521 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:56,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 401 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20201 [2021-06-05 14:04:56,628 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:56,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:56,628 INFO L82 PathProgramCache]: Analyzing trace with hash 549506409, now seen corresponding path program 400 times [2021-06-05 14:04:56,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:56,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120271081] [2021-06-05 14:04:56,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:56,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:56,699 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 14:04:56,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:56,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120271081] [2021-06-05 14:04:56,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120271081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:56,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631508684] [2021-06-05 14:04:56,700 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 14:04:56,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:04:56,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:56,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:04:56,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:56,764 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 14:04:56,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631508684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:56,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:56,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:04:56,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338518182] [2021-06-05 14:04:56,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:04:56,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:56,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:04:56,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:04:56,765 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 14:04:57,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:57,046 INFO L93 Difference]: Finished difference Result 34780 states and 103823 transitions. [2021-06-05 14:04:57,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:04:57,046 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 14:04:57,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:57,101 INFO L225 Difference]: With dead ends: 34780 [2021-06-05 14:04:57,101 INFO L226 Difference]: Without dead ends: 34778 [2021-06-05 14:04:57,102 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 129.9ms TimeCoverageRelationStatistics Valid=238, Invalid=412, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:04:57,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34778 states. [2021-06-05 14:04:57,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34778 to 34497. [2021-06-05 14:04:57,586 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 14:04:57,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34497 states to 34497 states and 103336 transitions. [2021-06-05 14:04:57,661 INFO L78 Accepts]: Start accepts. Automaton has 34497 states and 103336 transitions. Word has length 25 [2021-06-05 14:04:57,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:57,661 INFO L482 AbstractCegarLoop]: Abstraction has 34497 states and 103336 transitions. [2021-06-05 14:04:57,661 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 14:04:57,661 INFO L276 IsEmpty]: Start isEmpty. Operand 34497 states and 103336 transitions. [2021-06-05 14:04:57,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:04:57,695 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:57,695 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:57,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 402 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20202 [2021-06-05 14:04:57,895 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:57,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:57,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1466562762, now seen corresponding path program 401 times [2021-06-05 14:04:57,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:57,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729176614] [2021-06-05 14:04:57,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:57,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:57,965 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 14:04:57,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:57,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729176614] [2021-06-05 14:04:57,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729176614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:57,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762611992] [2021-06-05 14:04:57,966 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 14:04:57,992 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:04:57,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:57,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:04:57,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:58,038 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 14:04:58,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762611992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:58,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:58,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:04:58,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907292734] [2021-06-05 14:04:58,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:04:58,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:58,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:04:58,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:04:58,039 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 14:04:58,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:58,204 INFO L93 Difference]: Finished difference Result 35545 states and 105444 transitions. [2021-06-05 14:04:58,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:04:58,204 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 14:04:58,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:58,253 INFO L225 Difference]: With dead ends: 35545 [2021-06-05 14:04:58,253 INFO L226 Difference]: Without dead ends: 35545 [2021-06-05 14:04:58,253 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 70.5ms TimeCoverageRelationStatistics Valid=106, Invalid=134, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:04:58,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35545 states. [2021-06-05 14:04:58,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35545 to 34502. [2021-06-05 14:04:58,743 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 14:04:59,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34502 states to 34502 states and 103349 transitions. [2021-06-05 14:04:59,029 INFO L78 Accepts]: Start accepts. Automaton has 34502 states and 103349 transitions. Word has length 25 [2021-06-05 14:04:59,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:04:59,029 INFO L482 AbstractCegarLoop]: Abstraction has 34502 states and 103349 transitions. [2021-06-05 14:04:59,029 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 14:04:59,029 INFO L276 IsEmpty]: Start isEmpty. Operand 34502 states and 103349 transitions. [2021-06-05 14:04:59,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:04:59,060 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:04:59,060 INFO L521 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:04:59,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 403 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20203 [2021-06-05 14:04:59,261 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:04:59,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:04:59,261 INFO L82 PathProgramCache]: Analyzing trace with hash -2034847579, now seen corresponding path program 402 times [2021-06-05 14:04:59,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:04:59,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220846682] [2021-06-05 14:04:59,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:04:59,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:04:59,334 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 14:04:59,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:04:59,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220846682] [2021-06-05 14:04:59,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220846682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:59,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810150901] [2021-06-05 14:04:59,335 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 14:04:59,361 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 14:04:59,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:04:59,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:04:59,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:04:59,405 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 14:04:59,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810150901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:04:59,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:04:59,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 14:04:59,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45038244] [2021-06-05 14:04:59,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:04:59,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:04:59,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:04:59,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:04:59,406 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 14:04:59,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:04:59,746 INFO L93 Difference]: Finished difference Result 34731 states and 103707 transitions. [2021-06-05 14:04:59,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:04:59,747 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 14:04:59,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:04:59,796 INFO L225 Difference]: With dead ends: 34731 [2021-06-05 14:04:59,796 INFO L226 Difference]: Without dead ends: 34729 [2021-06-05 14:04:59,796 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 146.1ms TimeCoverageRelationStatistics Valid=267, Invalid=489, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:04:59,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34729 states. [2021-06-05 14:05:00,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34729 to 34502. [2021-06-05 14:05:00,256 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 14:05:00,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34502 states to 34502 states and 103347 transitions. [2021-06-05 14:05:00,333 INFO L78 Accepts]: Start accepts. Automaton has 34502 states and 103347 transitions. Word has length 25 [2021-06-05 14:05:00,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:00,333 INFO L482 AbstractCegarLoop]: Abstraction has 34502 states and 103347 transitions. [2021-06-05 14:05:00,333 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 14:05:00,333 INFO L276 IsEmpty]: Start isEmpty. Operand 34502 states and 103347 transitions. [2021-06-05 14:05:00,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:05:00,365 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:00,366 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:00,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 404 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20204 [2021-06-05 14:05:00,566 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:00,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:00,566 INFO L82 PathProgramCache]: Analyzing trace with hash -262484572, now seen corresponding path program 403 times [2021-06-05 14:05:00,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:00,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235467172] [2021-06-05 14:05:00,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:00,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:00,810 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 14:05:00,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:00,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235467172] [2021-06-05 14:05:00,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235467172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:00,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497743868] [2021-06-05 14:05:00,811 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 14:05:00,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:00,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:05:00,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:00,887 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 14:05:00,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497743868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:00,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:00,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 14:05:00,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303865945] [2021-06-05 14:05:00,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:05:00,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:00,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:05:00,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:05:00,888 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 14:05:01,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:01,075 INFO L93 Difference]: Finished difference Result 37216 states and 110229 transitions. [2021-06-05 14:05:01,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:05:01,076 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 14:05:01,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:01,134 INFO L225 Difference]: With dead ends: 37216 [2021-06-05 14:05:01,135 INFO L226 Difference]: Without dead ends: 37216 [2021-06-05 14:05:01,135 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 258.9ms TimeCoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:05:01,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37216 states. [2021-06-05 14:05:01,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37216 to 34471. [2021-06-05 14:05:01,787 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 14:05:01,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34471 states to 34471 states and 103233 transitions. [2021-06-05 14:05:01,868 INFO L78 Accepts]: Start accepts. Automaton has 34471 states and 103233 transitions. Word has length 25 [2021-06-05 14:05:01,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:01,869 INFO L482 AbstractCegarLoop]: Abstraction has 34471 states and 103233 transitions. [2021-06-05 14:05:01,869 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 14:05:01,869 INFO L276 IsEmpty]: Start isEmpty. Operand 34471 states and 103233 transitions. [2021-06-05 14:05:01,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:05:01,902 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:01,902 INFO L521 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:02,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20205,405 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:05:02,103 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:02,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:02,103 INFO L82 PathProgramCache]: Analyzing trace with hash -378356913, now seen corresponding path program 404 times [2021-06-05 14:05:02,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:02,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711466014] [2021-06-05 14:05:02,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:02,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:02,183 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 14:05:02,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:02,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711466014] [2021-06-05 14:05:02,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711466014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:02,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173995792] [2021-06-05 14:05:02,183 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 14:05:02,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:05:02,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:02,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:05:02,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:02,263 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 14:05:02,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173995792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:02,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:02,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:05:02,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963074820] [2021-06-05 14:05:02,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:05:02,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:02,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:05:02,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:05:02,264 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 14:05:02,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:02,688 INFO L93 Difference]: Finished difference Result 35061 states and 104338 transitions. [2021-06-05 14:05:02,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:05:02,689 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 14:05:02,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:02,748 INFO L225 Difference]: With dead ends: 35061 [2021-06-05 14:05:02,748 INFO L226 Difference]: Without dead ends: 35061 [2021-06-05 14:05:02,748 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 119.4ms TimeCoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:05:02,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35061 states. [2021-06-05 14:05:03,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35061 to 34496. [2021-06-05 14:05:03,286 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 14:05:03,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34496 states to 34496 states and 103316 transitions. [2021-06-05 14:05:03,369 INFO L78 Accepts]: Start accepts. Automaton has 34496 states and 103316 transitions. Word has length 25 [2021-06-05 14:05:03,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:03,369 INFO L482 AbstractCegarLoop]: Abstraction has 34496 states and 103316 transitions. [2021-06-05 14:05:03,369 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 14:05:03,370 INFO L276 IsEmpty]: Start isEmpty. Operand 34496 states and 103316 transitions. [2021-06-05 14:05:03,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:05:03,408 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:03,408 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:03,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20206,406 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:05:03,608 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:03,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:03,608 INFO L82 PathProgramCache]: Analyzing trace with hash 566405070, now seen corresponding path program 405 times [2021-06-05 14:05:03,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:03,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987244278] [2021-06-05 14:05:03,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:03,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:03,672 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 14:05:03,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:03,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987244278] [2021-06-05 14:05:03,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987244278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:03,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345348139] [2021-06-05 14:05:03,673 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 14:05:03,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:05:03,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:03,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:05:03,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:03,740 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 14:05:03,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345348139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:03,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:03,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:05:03,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193677881] [2021-06-05 14:05:03,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:05:03,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:03,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:05:03,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:05:03,741 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 14:05:04,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:04,179 INFO L93 Difference]: Finished difference Result 35075 states and 104177 transitions. [2021-06-05 14:05:04,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:05:04,179 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 14:05:04,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:04,238 INFO L225 Difference]: With dead ends: 35075 [2021-06-05 14:05:04,238 INFO L226 Difference]: Without dead ends: 35073 [2021-06-05 14:05:04,239 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 274.4ms TimeCoverageRelationStatistics Valid=245, Invalid=405, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:05:04,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35073 states. [2021-06-05 14:05:04,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35073 to 34510. [2021-06-05 14:05:04,807 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 14:05:04,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34510 states to 34510 states and 103364 transitions. [2021-06-05 14:05:04,876 INFO L78 Accepts]: Start accepts. Automaton has 34510 states and 103364 transitions. Word has length 25 [2021-06-05 14:05:04,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:04,877 INFO L482 AbstractCegarLoop]: Abstraction has 34510 states and 103364 transitions. [2021-06-05 14:05:04,877 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 14:05:04,877 INFO L276 IsEmpty]: Start isEmpty. Operand 34510 states and 103364 transitions. [2021-06-05 14:05:04,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:05:04,908 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:04,909 INFO L521 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:05,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20207,407 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:05:05,109 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:05,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:05,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1367097777, now seen corresponding path program 406 times [2021-06-05 14:05:05,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:05,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156586378] [2021-06-05 14:05:05,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:05,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:05,228 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-06-05 14:05:05,309 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 14:05:05,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:05,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156586378] [2021-06-05 14:05:05,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156586378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:05,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484077997] [2021-06-05 14:05:05,310 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 14:05:05,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:05:05,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:05,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:05:05,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:05,375 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 14:05:05,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484077997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:05,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:05,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:05:05,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745273722] [2021-06-05 14:05:05,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:05:05,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:05,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:05:05,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:05:05,376 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 14:05:05,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:05,688 INFO L93 Difference]: Finished difference Result 34813 states and 103831 transitions. [2021-06-05 14:05:05,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:05:05,689 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 14:05:05,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:05,739 INFO L225 Difference]: With dead ends: 34813 [2021-06-05 14:05:05,739 INFO L226 Difference]: Without dead ends: 34811 [2021-06-05 14:05:05,740 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 126.7ms TimeCoverageRelationStatistics Valid=239, Invalid=411, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:05:05,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34811 states. [2021-06-05 14:05:06,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34811 to 34480. [2021-06-05 14:05:06,401 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 14:05:06,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34480 states to 34480 states and 103267 transitions. [2021-06-05 14:05:06,479 INFO L78 Accepts]: Start accepts. Automaton has 34480 states and 103267 transitions. Word has length 25 [2021-06-05 14:05:06,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:06,479 INFO L482 AbstractCegarLoop]: Abstraction has 34480 states and 103267 transitions. [2021-06-05 14:05:06,479 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 14:05:06,479 INFO L276 IsEmpty]: Start isEmpty. Operand 34480 states and 103267 transitions. [2021-06-05 14:05:06,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:05:06,514 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:06,514 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:06,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20208,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:05:06,715 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:06,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:06,715 INFO L82 PathProgramCache]: Analyzing trace with hash -2010813166, now seen corresponding path program 407 times [2021-06-05 14:05:06,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:06,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696852116] [2021-06-05 14:05:06,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:06,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:06,779 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 14:05:06,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:06,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696852116] [2021-06-05 14:05:06,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696852116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:06,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406283854] [2021-06-05 14:05:06,780 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 14:05:06,807 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:05:06,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:06,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:05:06,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:06,853 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 14:05:06,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406283854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:06,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:06,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:05:06,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411613304] [2021-06-05 14:05:06,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:05:06,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:06,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:05:06,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:05:06,854 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 14:05:07,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:07,018 INFO L93 Difference]: Finished difference Result 35049 states and 104051 transitions. [2021-06-05 14:05:07,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:05:07,018 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 14:05:07,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:07,076 INFO L225 Difference]: With dead ends: 35049 [2021-06-05 14:05:07,077 INFO L226 Difference]: Without dead ends: 35049 [2021-06-05 14:05:07,077 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 64.6ms TimeCoverageRelationStatistics Valid=105, Invalid=135, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:05:07,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35049 states. [2021-06-05 14:05:07,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35049 to 34468. [2021-06-05 14:05:07,865 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 14:05:07,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34468 states to 34468 states and 103214 transitions. [2021-06-05 14:05:07,939 INFO L78 Accepts]: Start accepts. Automaton has 34468 states and 103214 transitions. Word has length 25 [2021-06-05 14:05:07,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:07,939 INFO L482 AbstractCegarLoop]: Abstraction has 34468 states and 103214 transitions. [2021-06-05 14:05:07,939 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 14:05:07,939 INFO L276 IsEmpty]: Start isEmpty. Operand 34468 states and 103214 transitions. [2021-06-05 14:05:07,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:05:07,972 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:07,972 INFO L521 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:08,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20209,409 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:05:08,172 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:08,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:08,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1217256211, now seen corresponding path program 408 times [2021-06-05 14:05:08,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:08,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928633431] [2021-06-05 14:05:08,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:08,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:08,246 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 14:05:08,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:08,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928633431] [2021-06-05 14:05:08,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928633431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:08,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255683125] [2021-06-05 14:05:08,247 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 14:05:08,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 14:05:08,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:08,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:05:08,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:08,313 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 14:05:08,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255683125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:08,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:08,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:05:08,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422858968] [2021-06-05 14:05:08,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:05:08,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:08,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:05:08,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:05:08,314 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 14:05:08,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:08,592 INFO L93 Difference]: Finished difference Result 34766 states and 103678 transitions. [2021-06-05 14:05:08,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:05:08,592 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 14:05:08,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:08,656 INFO L225 Difference]: With dead ends: 34766 [2021-06-05 14:05:08,656 INFO L226 Difference]: Without dead ends: 34764 [2021-06-05 14:05:08,656 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 132.8ms TimeCoverageRelationStatistics Valid=268, Invalid=488, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:05:08,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34764 states. [2021-06-05 14:05:09,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34764 to 34468. [2021-06-05 14:05:09,331 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 14:05:09,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34468 states to 34468 states and 103212 transitions. [2021-06-05 14:05:09,397 INFO L78 Accepts]: Start accepts. Automaton has 34468 states and 103212 transitions. Word has length 25 [2021-06-05 14:05:09,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:09,397 INFO L482 AbstractCegarLoop]: Abstraction has 34468 states and 103212 transitions. [2021-06-05 14:05:09,397 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 14:05:09,397 INFO L276 IsEmpty]: Start isEmpty. Operand 34468 states and 103212 transitions. [2021-06-05 14:05:09,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:05:09,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:09,429 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:09,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20210 [2021-06-05 14:05:09,629 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:09,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:09,630 INFO L82 PathProgramCache]: Analyzing trace with hash 555106796, now seen corresponding path program 409 times [2021-06-05 14:05:09,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:09,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058071417] [2021-06-05 14:05:09,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:09,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:09,701 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 14:05:09,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:09,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058071417] [2021-06-05 14:05:09,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058071417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:09,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159919605] [2021-06-05 14:05:09,701 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 14:05:09,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:09,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:05:09,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:09,772 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 14:05:09,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159919605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:09,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:09,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:05:09,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851575644] [2021-06-05 14:05:09,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:05:09,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:09,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:05:09,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:05:09,773 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 14:05:09,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:09,965 INFO L93 Difference]: Finished difference Result 36516 states and 108167 transitions. [2021-06-05 14:05:09,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:05:09,966 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 14:05:09,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:10,025 INFO L225 Difference]: With dead ends: 36516 [2021-06-05 14:05:10,025 INFO L226 Difference]: Without dead ends: 36516 [2021-06-05 14:05:10,025 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 81.7ms TimeCoverageRelationStatistics Valid=139, Invalid=203, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:05:10,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36516 states. [2021-06-05 14:05:10,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36516 to 34482. [2021-06-05 14:05:10,734 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 14:05:10,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34482 states to 34482 states and 103252 transitions. [2021-06-05 14:05:10,823 INFO L78 Accepts]: Start accepts. Automaton has 34482 states and 103252 transitions. Word has length 25 [2021-06-05 14:05:10,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:10,823 INFO L482 AbstractCegarLoop]: Abstraction has 34482 states and 103252 transitions. [2021-06-05 14:05:10,823 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 14:05:10,823 INFO L276 IsEmpty]: Start isEmpty. Operand 34482 states and 103252 transitions. [2021-06-05 14:05:11,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:05:11,052 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:11,052 INFO L521 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:11,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20211,411 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:05:11,253 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:11,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:11,253 INFO L82 PathProgramCache]: Analyzing trace with hash 272148785, now seen corresponding path program 410 times [2021-06-05 14:05:11,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:11,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178401510] [2021-06-05 14:05:11,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:11,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:11,331 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 14:05:11,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:11,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178401510] [2021-06-05 14:05:11,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178401510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:11,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569681640] [2021-06-05 14:05:11,331 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 14:05:11,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:05:11,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:11,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:05:11,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:11,396 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 14:05:11,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569681640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:11,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:11,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:05:11,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229749998] [2021-06-05 14:05:11,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:05:11,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:11,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:05:11,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:05:11,397 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 14:05:11,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:11,644 INFO L93 Difference]: Finished difference Result 34881 states and 104144 transitions. [2021-06-05 14:05:11,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:05:11,645 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 14:05:11,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:11,698 INFO L225 Difference]: With dead ends: 34881 [2021-06-05 14:05:11,698 INFO L226 Difference]: Without dead ends: 34878 [2021-06-05 14:05:11,698 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 137.3ms TimeCoverageRelationStatistics Valid=259, Invalid=497, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:05:11,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34878 states. [2021-06-05 14:05:12,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34878 to 34485. [2021-06-05 14:05:12,254 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 14:05:12,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34485 states to 34485 states and 103259 transitions. [2021-06-05 14:05:12,330 INFO L78 Accepts]: Start accepts. Automaton has 34485 states and 103259 transitions. Word has length 25 [2021-06-05 14:05:12,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:12,330 INFO L482 AbstractCegarLoop]: Abstraction has 34485 states and 103259 transitions. [2021-06-05 14:05:12,330 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 14:05:12,330 INFO L276 IsEmpty]: Start isEmpty. Operand 34485 states and 103259 transitions. [2021-06-05 14:05:12,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:05:12,365 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:12,365 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:12,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20212 [2021-06-05 14:05:12,565 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:12,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:12,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1505753006, now seen corresponding path program 411 times [2021-06-05 14:05:12,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:12,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603638613] [2021-06-05 14:05:12,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:12,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:12,643 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 14:05:12,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:12,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603638613] [2021-06-05 14:05:12,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603638613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:12,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669315142] [2021-06-05 14:05:12,644 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 14:05:12,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 14:05:12,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:12,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:05:12,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:12,720 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 14:05:12,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669315142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:12,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:12,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:05:12,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954444501] [2021-06-05 14:05:12,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:05:12,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:12,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:05:12,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:05:12,721 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 14:05:12,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:12,958 INFO L93 Difference]: Finished difference Result 46521 states and 138645 transitions. [2021-06-05 14:05:12,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:05:12,959 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 14:05:12,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:13,026 INFO L225 Difference]: With dead ends: 46521 [2021-06-05 14:05:13,026 INFO L226 Difference]: Without dead ends: 46521 [2021-06-05 14:05:13,026 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 103.2ms TimeCoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:05:13,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46521 states. [2021-06-05 14:05:13,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46521 to 44002. [2021-06-05 14:05:13,966 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 14:05:14,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44002 states to 44002 states and 132461 transitions. [2021-06-05 14:05:14,081 INFO L78 Accepts]: Start accepts. Automaton has 44002 states and 132461 transitions. Word has length 25 [2021-06-05 14:05:14,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:14,081 INFO L482 AbstractCegarLoop]: Abstraction has 44002 states and 132461 transitions. [2021-06-05 14:05:14,081 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 14:05:14,081 INFO L276 IsEmpty]: Start isEmpty. Operand 44002 states and 132461 transitions. [2021-06-05 14:05:14,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:05:14,123 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:14,123 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:14,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 413 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20213 [2021-06-05 14:05:14,324 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:14,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:14,324 INFO L82 PathProgramCache]: Analyzing trace with hash 460670884, now seen corresponding path program 412 times [2021-06-05 14:05:14,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:14,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197301899] [2021-06-05 14:05:14,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:14,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:14,390 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 14:05:14,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:14,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197301899] [2021-06-05 14:05:14,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197301899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:14,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549634210] [2021-06-05 14:05:14,390 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 14:05:14,417 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:05:14,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:14,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:05:14,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:14,462 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 14:05:14,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549634210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:14,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:14,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:05:14,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636604479] [2021-06-05 14:05:14,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:05:14,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:14,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:05:14,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:05:14,463 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 14:05:14,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:14,812 INFO L93 Difference]: Finished difference Result 44568 states and 133377 transitions. [2021-06-05 14:05:14,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:05:14,812 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 14:05:14,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:14,895 INFO L225 Difference]: With dead ends: 44568 [2021-06-05 14:05:14,895 INFO L226 Difference]: Without dead ends: 44564 [2021-06-05 14:05:14,895 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 135.2ms TimeCoverageRelationStatistics Valid=214, Invalid=386, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:05:14,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44564 states. [2021-06-05 14:05:15,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44564 to 44065. [2021-06-05 14:05:15,720 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 14:05:16,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44065 states to 44065 states and 132680 transitions. [2021-06-05 14:05:16,037 INFO L78 Accepts]: Start accepts. Automaton has 44065 states and 132680 transitions. Word has length 25 [2021-06-05 14:05:16,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:16,037 INFO L482 AbstractCegarLoop]: Abstraction has 44065 states and 132680 transitions. [2021-06-05 14:05:16,037 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 14:05:16,037 INFO L276 IsEmpty]: Start isEmpty. Operand 44065 states and 132680 transitions. [2021-06-05 14:05:16,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:05:16,079 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:16,079 INFO L521 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:16,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20214 [2021-06-05 14:05:16,280 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:16,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:16,280 INFO L82 PathProgramCache]: Analyzing trace with hash 354023683, now seen corresponding path program 413 times [2021-06-05 14:05:16,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:16,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892689376] [2021-06-05 14:05:16,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:16,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:16,360 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 14:05:16,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:16,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892689376] [2021-06-05 14:05:16,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892689376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:16,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471600061] [2021-06-05 14:05:16,360 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 14:05:16,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 14:05:16,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:16,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:05:16,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:16,427 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 14:05:16,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471600061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:16,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:16,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:05:16,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34193064] [2021-06-05 14:05:16,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:05:16,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:16,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:05:16,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:05:16,428 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 14:05:16,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:16,729 INFO L93 Difference]: Finished difference Result 44288 states and 133062 transitions. [2021-06-05 14:05:16,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:05:16,729 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 14:05:16,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:16,798 INFO L225 Difference]: With dead ends: 44288 [2021-06-05 14:05:16,798 INFO L226 Difference]: Without dead ends: 44282 [2021-06-05 14:05:16,798 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 139.7ms TimeCoverageRelationStatistics Valid=260, Invalid=496, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:05:16,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44282 states. [2021-06-05 14:05:17,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44282 to 44054. [2021-06-05 14:05:17,558 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 14:05:17,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44054 states to 44054 states and 132651 transitions. [2021-06-05 14:05:17,654 INFO L78 Accepts]: Start accepts. Automaton has 44054 states and 132651 transitions. Word has length 25 [2021-06-05 14:05:17,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:17,654 INFO L482 AbstractCegarLoop]: Abstraction has 44054 states and 132651 transitions. [2021-06-05 14:05:17,654 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 14:05:17,654 INFO L276 IsEmpty]: Start isEmpty. Operand 44054 states and 132651 transitions. [2021-06-05 14:05:17,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:05:17,691 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:17,691 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:17,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20215 [2021-06-05 14:05:17,891 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:17,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:17,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1423878108, now seen corresponding path program 414 times [2021-06-05 14:05:17,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:17,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005290113] [2021-06-05 14:05:17,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:17,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:17,963 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 14:05:17,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:17,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005290113] [2021-06-05 14:05:17,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005290113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:17,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456009867] [2021-06-05 14:05:17,964 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 14:05:17,992 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 14:05:17,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:17,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:05:17,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:18,037 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 14:05:18,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456009867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:18,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:18,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:05:18,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024992293] [2021-06-05 14:05:18,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:05:18,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:18,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:05:18,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:05:18,038 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 14:05:18,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:18,495 INFO L93 Difference]: Finished difference Result 48810 states and 145573 transitions. [2021-06-05 14:05:18,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:05:18,496 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 14:05:18,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:18,576 INFO L225 Difference]: With dead ends: 48810 [2021-06-05 14:05:18,576 INFO L226 Difference]: Without dead ends: 48810 [2021-06-05 14:05:18,576 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 99.6ms TimeCoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:05:18,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48810 states. [2021-06-05 14:05:19,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48810 to 34578. [2021-06-05 14:05:19,481 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 14:05:19,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34578 states to 34578 states and 103641 transitions. [2021-06-05 14:05:19,559 INFO L78 Accepts]: Start accepts. Automaton has 34578 states and 103641 transitions. Word has length 25 [2021-06-05 14:05:19,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:19,559 INFO L482 AbstractCegarLoop]: Abstraction has 34578 states and 103641 transitions. [2021-06-05 14:05:19,559 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 14:05:19,559 INFO L276 IsEmpty]: Start isEmpty. Operand 34578 states and 103641 transitions. [2021-06-05 14:05:19,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:05:19,591 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:19,591 INFO L521 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:19,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20216,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:05:19,792 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:19,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:19,792 INFO L82 PathProgramCache]: Analyzing trace with hash -802828281, now seen corresponding path program 415 times [2021-06-05 14:05:19,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:19,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797623912] [2021-06-05 14:05:19,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:19,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:19,855 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 14:05:19,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:19,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797623912] [2021-06-05 14:05:19,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797623912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:19,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924168744] [2021-06-05 14:05:19,855 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 14:05:19,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:19,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:05:19,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:19,926 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 14:05:19,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924168744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:19,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:19,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:05:19,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700289976] [2021-06-05 14:05:19,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:05:19,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:19,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:05:19,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:05:19,926 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 14:05:20,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:20,141 INFO L93 Difference]: Finished difference Result 35262 states and 104945 transitions. [2021-06-05 14:05:20,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:05:20,142 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 14:05:20,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:20,192 INFO L225 Difference]: With dead ends: 35262 [2021-06-05 14:05:20,193 INFO L226 Difference]: Without dead ends: 35262 [2021-06-05 14:05:20,193 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=184, Invalid=278, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:05:20,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35262 states. [2021-06-05 14:05:20,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35262 to 34634. [2021-06-05 14:05:20,855 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 14:05:20,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34634 states to 34634 states and 103815 transitions. [2021-06-05 14:05:20,923 INFO L78 Accepts]: Start accepts. Automaton has 34634 states and 103815 transitions. Word has length 25 [2021-06-05 14:05:20,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:20,924 INFO L482 AbstractCegarLoop]: Abstraction has 34634 states and 103815 transitions. [2021-06-05 14:05:20,924 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 14:05:20,924 INFO L276 IsEmpty]: Start isEmpty. Operand 34634 states and 103815 transitions. [2021-06-05 14:05:20,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:05:20,955 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:20,955 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:21,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20217,417 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:05:21,156 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:21,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:21,156 INFO L82 PathProgramCache]: Analyzing trace with hash 141933702, now seen corresponding path program 416 times [2021-06-05 14:05:21,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:21,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535797352] [2021-06-05 14:05:21,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:21,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:21,217 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 14:05:21,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:21,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535797352] [2021-06-05 14:05:21,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535797352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:21,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51471004] [2021-06-05 14:05:21,218 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 14:05:21,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:05:21,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:21,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:05:21,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:21,283 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 14:05:21,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51471004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:21,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:21,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:05:21,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600997542] [2021-06-05 14:05:21,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:05:21,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:21,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:05:21,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:05:21,284 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 14:05:21,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:21,556 INFO L93 Difference]: Finished difference Result 35187 states and 104616 transitions. [2021-06-05 14:05:21,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:05:21,557 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 14:05:21,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:21,608 INFO L225 Difference]: With dead ends: 35187 [2021-06-05 14:05:21,608 INFO L226 Difference]: Without dead ends: 35183 [2021-06-05 14:05:21,609 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 127.5ms TimeCoverageRelationStatistics Valid=244, Invalid=406, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:05:21,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35183 states. [2021-06-05 14:05:22,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35183 to 34619. [2021-06-05 14:05:22,231 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 14:05:22,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34619 states to 34619 states and 103759 transitions. [2021-06-05 14:05:22,303 INFO L78 Accepts]: Start accepts. Automaton has 34619 states and 103759 transitions. Word has length 25 [2021-06-05 14:05:22,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:22,303 INFO L482 AbstractCegarLoop]: Abstraction has 34619 states and 103759 transitions. [2021-06-05 14:05:22,303 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 14:05:22,303 INFO L276 IsEmpty]: Start isEmpty. Operand 34619 states and 103759 transitions. [2021-06-05 14:05:22,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:05:22,335 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:22,335 INFO L521 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:22,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20218,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:05:22,535 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:22,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:22,535 INFO L82 PathProgramCache]: Analyzing trace with hash 942626409, now seen corresponding path program 417 times [2021-06-05 14:05:22,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:22,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549098485] [2021-06-05 14:05:22,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:22,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:22,599 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 14:05:22,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:22,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549098485] [2021-06-05 14:05:22,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549098485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:22,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287615988] [2021-06-05 14:05:22,600 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 14:05:22,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 14:05:22,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:22,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:05:22,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:22,811 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 14:05:22,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287615988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:22,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:22,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2021-06-05 14:05:22,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824950340] [2021-06-05 14:05:22,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 14:05:22,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:22,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 14:05:22,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:05:22,812 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 14:05:23,397 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-06-05 14:05:24,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:24,851 INFO L93 Difference]: Finished difference Result 67922 states and 202433 transitions. [2021-06-05 14:05:24,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-06-05 14:05:24,852 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 14:05:24,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:24,993 INFO L225 Difference]: With dead ends: 67922 [2021-06-05 14:05:24,993 INFO L226 Difference]: Without dead ends: 67903 [2021-06-05 14:05:24,994 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5477 ImplicationChecksByTransitivity, 1421.6ms TimeCoverageRelationStatistics Valid=1479, Invalid=14021, Unknown=0, NotChecked=0, Total=15500 [2021-06-05 14:05:25,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67903 states. [2021-06-05 14:05:25,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67903 to 38876. [2021-06-05 14:05:25,917 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 14:05:25,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38876 states to 38876 states and 115368 transitions. [2021-06-05 14:05:25,999 INFO L78 Accepts]: Start accepts. Automaton has 38876 states and 115368 transitions. Word has length 25 [2021-06-05 14:05:25,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:25,999 INFO L482 AbstractCegarLoop]: Abstraction has 38876 states and 115368 transitions. [2021-06-05 14:05:25,999 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 14:05:25,999 INFO L276 IsEmpty]: Start isEmpty. Operand 38876 states and 115368 transitions. [2021-06-05 14:05:26,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:05:26,035 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:26,035 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:26,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20219,419 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:05:26,235 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:26,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:26,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1859682762, now seen corresponding path program 418 times [2021-06-05 14:05:26,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:26,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479518956] [2021-06-05 14:05:26,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:26,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:26,298 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 14:05:26,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:26,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479518956] [2021-06-05 14:05:26,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479518956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:26,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734608105] [2021-06-05 14:05:26,298 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 14:05:26,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:05:26,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:26,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:05:26,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:26,369 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 14:05:26,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734608105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:26,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:26,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:05:26,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814850128] [2021-06-05 14:05:26,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:05:26,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:26,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:05:26,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:05:26,370 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 14:05:26,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:26,721 INFO L93 Difference]: Finished difference Result 40813 states and 119859 transitions. [2021-06-05 14:05:26,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:05:26,722 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 14:05:26,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:26,784 INFO L225 Difference]: With dead ends: 40813 [2021-06-05 14:05:26,784 INFO L226 Difference]: Without dead ends: 40813 [2021-06-05 14:05:26,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 67.6ms TimeCoverageRelationStatistics Valid=118, Invalid=154, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:05:26,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40813 states. [2021-06-05 14:05:27,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40813 to 38877. [2021-06-05 14:05:27,570 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 14:05:27,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38877 states to 38877 states and 115354 transitions. [2021-06-05 14:05:27,649 INFO L78 Accepts]: Start accepts. Automaton has 38877 states and 115354 transitions. Word has length 25 [2021-06-05 14:05:27,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:27,650 INFO L482 AbstractCegarLoop]: Abstraction has 38877 states and 115354 transitions. [2021-06-05 14:05:27,650 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 14:05:27,650 INFO L276 IsEmpty]: Start isEmpty. Operand 38877 states and 115354 transitions. [2021-06-05 14:05:27,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:05:27,685 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:27,685 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:27,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20220,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:05:27,886 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:27,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:27,886 INFO L82 PathProgramCache]: Analyzing trace with hash 130635428, now seen corresponding path program 419 times [2021-06-05 14:05:27,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:27,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661273783] [2021-06-05 14:05:27,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:27,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:27,950 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 14:05:27,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:27,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661273783] [2021-06-05 14:05:27,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661273783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:27,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286569655] [2021-06-05 14:05:27,951 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 14:05:27,978 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 14:05:27,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:27,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:05:27,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:28,028 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 14:05:28,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286569655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:28,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:28,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 14:05:28,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469665540] [2021-06-05 14:05:28,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:05:28,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:28,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:05:28,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:05:28,029 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 14:05:28,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:28,219 INFO L93 Difference]: Finished difference Result 39523 states and 116192 transitions. [2021-06-05 14:05:28,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:05:28,219 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 14:05:28,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:28,280 INFO L225 Difference]: With dead ends: 39523 [2021-06-05 14:05:28,280 INFO L226 Difference]: Without dead ends: 39523 [2021-06-05 14:05:28,280 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 74.1ms TimeCoverageRelationStatistics Valid=122, Invalid=184, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:05:28,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39523 states. [2021-06-05 14:05:28,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39523 to 38819. [2021-06-05 14:05:29,029 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 14:05:29,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38819 states to 38819 states and 115151 transitions. [2021-06-05 14:05:29,120 INFO L78 Accepts]: Start accepts. Automaton has 38819 states and 115151 transitions. Word has length 25 [2021-06-05 14:05:29,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:29,120 INFO L482 AbstractCegarLoop]: Abstraction has 38819 states and 115151 transitions. [2021-06-05 14:05:29,120 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 14:05:29,120 INFO L276 IsEmpty]: Start isEmpty. Operand 38819 states and 115151 transitions. [2021-06-05 14:05:29,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:05:29,159 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:29,159 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:29,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20221 [2021-06-05 14:05:29,360 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:29,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:29,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1930224374, now seen corresponding path program 420 times [2021-06-05 14:05:29,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:29,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341141087] [2021-06-05 14:05:29,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:29,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:29,439 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 14:05:29,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:29,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341141087] [2021-06-05 14:05:29,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341141087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:29,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115388384] [2021-06-05 14:05:29,439 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 14:05:29,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 14:05:29,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:29,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:05:29,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:29,527 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 14:05:29,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115388384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:29,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:29,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:05:29,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444516807] [2021-06-05 14:05:29,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:05:29,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:29,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:05:29,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:05:29,528 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 14:05:29,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:29,787 INFO L93 Difference]: Finished difference Result 42306 states and 124008 transitions. [2021-06-05 14:05:29,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:05:29,788 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 14:05:29,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:29,862 INFO L225 Difference]: With dead ends: 42306 [2021-06-05 14:05:29,862 INFO L226 Difference]: Without dead ends: 42306 [2021-06-05 14:05:29,862 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 109.2ms TimeCoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:05:29,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42306 states. [2021-06-05 14:05:30,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42306 to 38691. [2021-06-05 14:05:30,665 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 14:05:30,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38691 states to 38691 states and 114683 transitions. [2021-06-05 14:05:30,745 INFO L78 Accepts]: Start accepts. Automaton has 38691 states and 114683 transitions. Word has length 25 [2021-06-05 14:05:30,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:30,745 INFO L482 AbstractCegarLoop]: Abstraction has 38691 states and 114683 transitions. [2021-06-05 14:05:30,745 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 14:05:30,745 INFO L276 IsEmpty]: Start isEmpty. Operand 38691 states and 114683 transitions. [2021-06-05 14:05:30,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:05:30,781 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:30,781 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:30,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20222,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:05:30,982 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:30,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:30,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1392368796, now seen corresponding path program 421 times [2021-06-05 14:05:30,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:30,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349299980] [2021-06-05 14:05:30,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:30,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:31,058 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 14:05:31,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:31,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349299980] [2021-06-05 14:05:31,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349299980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:31,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226297896] [2021-06-05 14:05:31,058 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 14:05:31,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:31,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:05:31,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:31,134 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 14:05:31,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226297896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:31,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:31,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:05:31,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042477869] [2021-06-05 14:05:31,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:05:31,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:31,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:05:31,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:05:31,135 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 14:05:31,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:31,451 INFO L93 Difference]: Finished difference Result 55502 states and 163268 transitions. [2021-06-05 14:05:31,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:05:31,451 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 14:05:31,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:31,552 INFO L225 Difference]: With dead ends: 55502 [2021-06-05 14:05:31,552 INFO L226 Difference]: Without dead ends: 55502 [2021-06-05 14:05:31,553 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 129.9ms TimeCoverageRelationStatistics Valid=241, Invalid=409, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:05:31,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55502 states. [2021-06-05 14:05:32,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55502 to 48558. [2021-06-05 14:05:32,683 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 14:05:32,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48558 states to 48558 states and 144555 transitions. [2021-06-05 14:05:32,786 INFO L78 Accepts]: Start accepts. Automaton has 48558 states and 144555 transitions. Word has length 25 [2021-06-05 14:05:32,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:32,786 INFO L482 AbstractCegarLoop]: Abstraction has 48558 states and 144555 transitions. [2021-06-05 14:05:32,786 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 14:05:32,786 INFO L276 IsEmpty]: Start isEmpty. Operand 48558 states and 144555 transitions. [2021-06-05 14:05:32,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:05:32,831 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:32,831 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:33,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20223 [2021-06-05 14:05:33,031 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:33,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:33,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1145753042, now seen corresponding path program 422 times [2021-06-05 14:05:33,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:33,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073294544] [2021-06-05 14:05:33,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:33,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:33,106 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 14:05:33,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:33,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073294544] [2021-06-05 14:05:33,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073294544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:33,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53378618] [2021-06-05 14:05:33,107 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 14:05:33,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:05:33,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:33,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:05:33,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:33,177 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 14:05:33,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53378618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:33,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:33,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 14:05:33,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782030676] [2021-06-05 14:05:33,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:05:33,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:33,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:05:33,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:05:33,178 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 14:05:33,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:33,514 INFO L93 Difference]: Finished difference Result 55938 states and 164755 transitions. [2021-06-05 14:05:33,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:05:33,515 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 14:05:33,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:33,640 INFO L225 Difference]: With dead ends: 55938 [2021-06-05 14:05:33,640 INFO L226 Difference]: Without dead ends: 55938 [2021-06-05 14:05:33,640 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 124.6ms TimeCoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:05:33,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55938 states. [2021-06-05 14:05:34,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55938 to 38647. [2021-06-05 14:05:34,630 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 14:05:34,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38647 states to 38647 states and 114613 transitions. [2021-06-05 14:05:34,726 INFO L78 Accepts]: Start accepts. Automaton has 38647 states and 114613 transitions. Word has length 25 [2021-06-05 14:05:34,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:34,726 INFO L482 AbstractCegarLoop]: Abstraction has 38647 states and 114613 transitions. [2021-06-05 14:05:34,726 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 14:05:34,726 INFO L276 IsEmpty]: Start isEmpty. Operand 38647 states and 114613 transitions. [2021-06-05 14:05:34,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:05:34,766 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:34,766 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:34,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20224,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:05:34,967 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:34,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:34,967 INFO L82 PathProgramCache]: Analyzing trace with hash -131776818, now seen corresponding path program 423 times [2021-06-05 14:05:34,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:34,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327674239] [2021-06-05 14:05:34,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:34,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:35,033 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 14:05:35,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:35,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327674239] [2021-06-05 14:05:35,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327674239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:35,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730122118] [2021-06-05 14:05:35,034 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 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 14:05:35,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 14:05:35,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:35,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:05:35,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:35,109 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 14:05:35,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730122118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:35,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:35,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:05:35,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119814244] [2021-06-05 14:05:35,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:05:35,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:35,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:05:35,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:05:35,110 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 14:05:35,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:35,421 INFO L93 Difference]: Finished difference Result 39269 states and 115484 transitions. [2021-06-05 14:05:35,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:05:35,421 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 14:05:35,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:35,483 INFO L225 Difference]: With dead ends: 39269 [2021-06-05 14:05:35,483 INFO L226 Difference]: Without dead ends: 39265 [2021-06-05 14:05:35,483 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 135.4ms TimeCoverageRelationStatistics Valid=243, Invalid=407, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:05:35,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39265 states. [2021-06-05 14:05:36,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39265 to 38661. [2021-06-05 14:05:36,308 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 14:05:36,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38661 states to 38661 states and 114650 transitions. [2021-06-05 14:05:36,389 INFO L78 Accepts]: Start accepts. Automaton has 38661 states and 114650 transitions. Word has length 25 [2021-06-05 14:05:36,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:36,389 INFO L482 AbstractCegarLoop]: Abstraction has 38661 states and 114650 transitions. [2021-06-05 14:05:36,389 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 14:05:36,389 INFO L276 IsEmpty]: Start isEmpty. Operand 38661 states and 114650 transitions. [2021-06-05 14:05:36,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:05:36,426 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:36,426 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:36,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 425 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20225 [2021-06-05 14:05:36,627 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:36,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:36,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1585972242, now seen corresponding path program 424 times [2021-06-05 14:05:36,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:36,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445692842] [2021-06-05 14:05:36,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:36,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:36,685 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 14:05:36,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:36,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445692842] [2021-06-05 14:05:36,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445692842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:36,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587415926] [2021-06-05 14:05:36,686 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 14:05:36,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:05:36,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:36,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:05:36,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:36,757 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 14:05:36,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587415926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:36,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:36,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:05:36,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193756219] [2021-06-05 14:05:36,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:05:36,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:36,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:05:36,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:05:36,758 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 14:05:37,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:37,236 INFO L93 Difference]: Finished difference Result 41548 states and 121884 transitions. [2021-06-05 14:05:37,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:05:37,236 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 14:05:37,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:37,299 INFO L225 Difference]: With dead ends: 41548 [2021-06-05 14:05:37,299 INFO L226 Difference]: Without dead ends: 41548 [2021-06-05 14:05:37,299 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 68.4ms TimeCoverageRelationStatistics Valid=131, Invalid=175, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:05:37,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41548 states. [2021-06-05 14:05:37,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41548 to 38678. [2021-06-05 14:05:37,862 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 14:05:37,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38678 states to 38678 states and 114685 transitions. [2021-06-05 14:05:37,947 INFO L78 Accepts]: Start accepts. Automaton has 38678 states and 114685 transitions. Word has length 25 [2021-06-05 14:05:37,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:37,947 INFO L482 AbstractCegarLoop]: Abstraction has 38678 states and 114685 transitions. [2021-06-05 14:05:37,947 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 14:05:37,947 INFO L276 IsEmpty]: Start isEmpty. Operand 38678 states and 114685 transitions. [2021-06-05 14:05:37,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:05:37,986 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:37,986 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:38,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20226,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:05:38,187 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:38,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:38,187 INFO L82 PathProgramCache]: Analyzing trace with hash -143075092, now seen corresponding path program 425 times [2021-06-05 14:05:38,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:38,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471698964] [2021-06-05 14:05:38,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:38,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:38,253 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 14:05:38,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:38,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471698964] [2021-06-05 14:05:38,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471698964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:38,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521855365] [2021-06-05 14:05:38,253 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 14:05:38,281 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 14:05:38,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:38,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:05:38,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:38,531 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 14:05:38,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521855365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:38,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:38,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:05:38,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434871680] [2021-06-05 14:05:38,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:05:38,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:38,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:05:38,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:05:38,532 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 14:05:38,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:38,733 INFO L93 Difference]: Finished difference Result 41975 states and 123155 transitions. [2021-06-05 14:05:38,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:05:38,734 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 14:05:38,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:38,800 INFO L225 Difference]: With dead ends: 41975 [2021-06-05 14:05:38,800 INFO L226 Difference]: Without dead ends: 41975 [2021-06-05 14:05:38,800 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 82.0ms TimeCoverageRelationStatistics Valid=152, Invalid=228, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:05:38,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41975 states. [2021-06-05 14:05:39,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41975 to 38672. [2021-06-05 14:05:39,387 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 14:05:39,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38672 states to 38672 states and 114655 transitions. [2021-06-05 14:05:39,711 INFO L78 Accepts]: Start accepts. Automaton has 38672 states and 114655 transitions. Word has length 25 [2021-06-05 14:05:39,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:39,711 INFO L482 AbstractCegarLoop]: Abstraction has 38672 states and 114655 transitions. [2021-06-05 14:05:39,711 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 14:05:39,711 INFO L276 IsEmpty]: Start isEmpty. Operand 38672 states and 114655 transitions. [2021-06-05 14:05:39,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:05:39,755 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:39,756 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:39,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20227,427 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:05:39,956 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:39,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:39,956 INFO L82 PathProgramCache]: Analyzing trace with hash 2091032402, now seen corresponding path program 426 times [2021-06-05 14:05:39,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:39,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991404813] [2021-06-05 14:05:39,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:39,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:40,032 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 14:05:40,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:40,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991404813] [2021-06-05 14:05:40,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991404813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:40,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696456421] [2021-06-05 14:05:40,032 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 14:05:40,062 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 14:05:40,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:40,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:05:40,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:40,114 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 14:05:40,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696456421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:40,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:40,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:05:40,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973257861] [2021-06-05 14:05:40,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:05:40,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:40,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:05:40,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:05:40,115 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 14:05:40,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:40,415 INFO L93 Difference]: Finished difference Result 60964 states and 181254 transitions. [2021-06-05 14:05:40,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:05:40,415 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 14:05:40,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:40,543 INFO L225 Difference]: With dead ends: 60964 [2021-06-05 14:05:40,543 INFO L226 Difference]: Without dead ends: 60964 [2021-06-05 14:05:40,543 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 87.9ms TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:05:40,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60964 states. [2021-06-05 14:05:41,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60964 to 60066. [2021-06-05 14:05:41,738 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 14:05:41,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60066 states to 60066 states and 179971 transitions. [2021-06-05 14:05:41,887 INFO L78 Accepts]: Start accepts. Automaton has 60066 states and 179971 transitions. Word has length 25 [2021-06-05 14:05:41,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:41,887 INFO L482 AbstractCegarLoop]: Abstraction has 60066 states and 179971 transitions. [2021-06-05 14:05:41,888 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 14:05:41,888 INFO L276 IsEmpty]: Start isEmpty. Operand 60066 states and 179971 transitions. [2021-06-05 14:05:41,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:05:41,940 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:41,941 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:42,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20228,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:05:42,141 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:42,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:42,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1666079316, now seen corresponding path program 427 times [2021-06-05 14:05:42,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:42,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280870816] [2021-06-05 14:05:42,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:42,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:42,218 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 14:05:42,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:42,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280870816] [2021-06-05 14:05:42,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280870816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:42,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399830743] [2021-06-05 14:05:42,218 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 14:05:42,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:42,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:05:42,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:42,289 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 14:05:42,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399830743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:42,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:42,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 14:05:42,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62009718] [2021-06-05 14:05:42,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:05:42,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:42,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:05:42,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:05:42,290 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 14:05:42,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:42,868 INFO L93 Difference]: Finished difference Result 63184 states and 187571 transitions. [2021-06-05 14:05:42,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:05:42,868 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 14:05:42,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:42,986 INFO L225 Difference]: With dead ends: 63184 [2021-06-05 14:05:42,986 INFO L226 Difference]: Without dead ends: 63184 [2021-06-05 14:05:42,986 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 111.8ms TimeCoverageRelationStatistics Valid=201, Invalid=351, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:05:43,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63184 states. [2021-06-05 14:05:43,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63184 to 59924. [2021-06-05 14:05:44,061 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 14:05:44,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59924 states to 59924 states and 179495 transitions. [2021-06-05 14:05:44,206 INFO L78 Accepts]: Start accepts. Automaton has 59924 states and 179495 transitions. Word has length 25 [2021-06-05 14:05:44,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:44,206 INFO L482 AbstractCegarLoop]: Abstraction has 59924 states and 179495 transitions. [2021-06-05 14:05:44,206 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 14:05:44,206 INFO L276 IsEmpty]: Start isEmpty. Operand 59924 states and 179495 transitions. [2021-06-05 14:05:44,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:05:44,254 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:44,254 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:44,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20229,429 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:05:44,455 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:44,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:44,455 INFO L82 PathProgramCache]: Analyzing trace with hash 2122541714, now seen corresponding path program 428 times [2021-06-05 14:05:44,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:44,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093799441] [2021-06-05 14:05:44,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:44,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:44,534 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 14:05:44,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:44,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093799441] [2021-06-05 14:05:44,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093799441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:44,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807242400] [2021-06-05 14:05:44,535 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 14:05:44,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:05:44,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:44,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:05:44,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:44,607 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 14:05:44,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807242400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:44,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:44,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 14:05:44,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001843890] [2021-06-05 14:05:44,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:05:44,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:44,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:05:44,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:05:44,608 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 14:05:45,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:45,080 INFO L93 Difference]: Finished difference Result 90970 states and 272969 transitions. [2021-06-05 14:05:45,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:05:45,081 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 14:05:45,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:45,266 INFO L225 Difference]: With dead ends: 90970 [2021-06-05 14:05:45,266 INFO L226 Difference]: Without dead ends: 90970 [2021-06-05 14:05:45,267 INFO L777 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 14:05:45,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90970 states. [2021-06-05 14:05:47,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90970 to 87092. [2021-06-05 14:05:47,217 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 14:05:47,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87092 states to 87092 states and 263214 transitions. [2021-06-05 14:05:47,443 INFO L78 Accepts]: Start accepts. Automaton has 87092 states and 263214 transitions. Word has length 25 [2021-06-05 14:05:47,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:47,444 INFO L482 AbstractCegarLoop]: Abstraction has 87092 states and 263214 transitions. [2021-06-05 14:05:47,444 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 14:05:47,444 INFO L276 IsEmpty]: Start isEmpty. Operand 87092 states and 263214 transitions. [2021-06-05 14:05:47,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:05:47,521 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:47,521 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:47,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 430 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20230 [2021-06-05 14:05:47,721 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:47,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:47,722 INFO L82 PathProgramCache]: Analyzing trace with hash -195102390, now seen corresponding path program 429 times [2021-06-05 14:05:47,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:47,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51717377] [2021-06-05 14:05:47,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:47,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:47,789 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 14:05:47,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:47,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51717377] [2021-06-05 14:05:47,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51717377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:47,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062183595] [2021-06-05 14:05:47,789 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 14:05:47,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 14:05:47,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:47,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:05:47,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:47,863 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 14:05:47,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062183595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:47,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:47,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:05:47,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085991978] [2021-06-05 14:05:47,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:05:47,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:47,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:05:47,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:05:47,864 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 14:05:48,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:48,237 INFO L93 Difference]: Finished difference Result 87908 states and 264688 transitions. [2021-06-05 14:05:48,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:05:48,237 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 14:05:48,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:48,843 INFO L225 Difference]: With dead ends: 87908 [2021-06-05 14:05:48,843 INFO L226 Difference]: Without dead ends: 87908 [2021-06-05 14:05:48,843 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 77.2ms TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:05:48,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87908 states. [2021-06-05 14:05:50,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87908 to 87088. [2021-06-05 14:05:50,424 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 14:05:50,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87088 states to 87088 states and 263219 transitions. [2021-06-05 14:05:50,659 INFO L78 Accepts]: Start accepts. Automaton has 87088 states and 263219 transitions. Word has length 25 [2021-06-05 14:05:50,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:50,659 INFO L482 AbstractCegarLoop]: Abstraction has 87088 states and 263219 transitions. [2021-06-05 14:05:50,659 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 14:05:50,659 INFO L276 IsEmpty]: Start isEmpty. Operand 87088 states and 263219 transitions. [2021-06-05 14:05:50,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:05:50,736 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:50,736 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:50,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20231 [2021-06-05 14:05:50,936 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:50,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:50,937 INFO L82 PathProgramCache]: Analyzing trace with hash 342753188, now seen corresponding path program 430 times [2021-06-05 14:05:50,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:50,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924647913] [2021-06-05 14:05:50,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:50,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:51,010 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 14:05:51,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:51,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924647913] [2021-06-05 14:05:51,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924647913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:51,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865244934] [2021-06-05 14:05:51,010 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 14:05:51,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:05:51,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:51,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:05:51,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:51,082 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 14:05:51,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865244934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:51,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:51,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 14:05:51,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597175998] [2021-06-05 14:05:51,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:05:51,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:51,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:05:51,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:05:51,083 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 14:05:51,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:51,866 INFO L93 Difference]: Finished difference Result 94912 states and 285142 transitions. [2021-06-05 14:05:51,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:05:51,867 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 14:05:51,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:52,073 INFO L225 Difference]: With dead ends: 94912 [2021-06-05 14:05:52,073 INFO L226 Difference]: Without dead ends: 94912 [2021-06-05 14:05:52,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 109.3ms TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:05:52,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94912 states. [2021-06-05 14:05:53,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94912 to 56562. [2021-06-05 14:05:53,665 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 14:05:53,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56562 states to 56562 states and 168999 transitions. [2021-06-05 14:05:53,810 INFO L78 Accepts]: Start accepts. Automaton has 56562 states and 168999 transitions. Word has length 25 [2021-06-05 14:05:53,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:53,810 INFO L482 AbstractCegarLoop]: Abstraction has 56562 states and 168999 transitions. [2021-06-05 14:05:53,810 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 14:05:53,810 INFO L276 IsEmpty]: Start isEmpty. Operand 56562 states and 168999 transitions. [2021-06-05 14:05:53,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:05:53,857 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:53,857 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:54,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 432 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20232 [2021-06-05 14:05:54,058 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:54,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:54,058 INFO L82 PathProgramCache]: Analyzing trace with hash -163593078, now seen corresponding path program 431 times [2021-06-05 14:05:54,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:54,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115691109] [2021-06-05 14:05:54,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:54,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:54,135 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 14:05:54,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:54,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115691109] [2021-06-05 14:05:54,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115691109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:54,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961030494] [2021-06-05 14:05:54,135 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 14:05:54,163 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 14:05:54,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:54,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:05:54,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:54,208 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 14:05:54,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961030494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:54,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:54,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 14:05:54,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890366859] [2021-06-05 14:05:54,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:05:54,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:54,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:05:54,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:05:54,209 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 14:05:54,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:54,962 INFO L93 Difference]: Finished difference Result 78230 states and 232047 transitions. [2021-06-05 14:05:54,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:05:54,962 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 14:05:54,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:55,119 INFO L225 Difference]: With dead ends: 78230 [2021-06-05 14:05:55,120 INFO L226 Difference]: Without dead ends: 78230 [2021-06-05 14:05:55,120 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 155.5ms TimeCoverageRelationStatistics Valid=310, Invalid=560, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:05:55,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78230 states. [2021-06-05 14:05:56,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78230 to 47991. [2021-06-05 14:05:56,214 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 14:05:56,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47991 states to 47991 states and 142736 transitions. [2021-06-05 14:05:56,321 INFO L78 Accepts]: Start accepts. Automaton has 47991 states and 142736 transitions. Word has length 25 [2021-06-05 14:05:56,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:56,321 INFO L482 AbstractCegarLoop]: Abstraction has 47991 states and 142736 transitions. [2021-06-05 14:05:56,321 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 14:05:56,321 INFO L276 IsEmpty]: Start isEmpty. Operand 47991 states and 142736 transitions. [2021-06-05 14:05:56,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:05:56,365 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:56,365 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:56,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 433 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20233 [2021-06-05 14:05:56,565 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:56,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:56,565 INFO L82 PathProgramCache]: Analyzing trace with hash 76191076, now seen corresponding path program 432 times [2021-06-05 14:05:56,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:56,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670780998] [2021-06-05 14:05:56,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:56,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:56,620 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 14:05:56,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:56,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670780998] [2021-06-05 14:05:56,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670780998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:56,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591018276] [2021-06-05 14:05:56,620 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 14:05:56,649 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 14:05:56,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:05:56,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:05:56,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:56,688 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 14:05:56,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591018276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:56,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:56,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:05:56,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409660726] [2021-06-05 14:05:56,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:05:56,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:56,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:05:56,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:05:56,689 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 14:05:56,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:56,984 INFO L93 Difference]: Finished difference Result 48514 states and 143403 transitions. [2021-06-05 14:05:56,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:05:56,984 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 14:05:56,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:57,061 INFO L225 Difference]: With dead ends: 48514 [2021-06-05 14:05:57,062 INFO L226 Difference]: Without dead ends: 48510 [2021-06-05 14:05:57,062 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 115.2ms TimeCoverageRelationStatistics Valid=212, Invalid=388, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:05:57,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48510 states. [2021-06-05 14:05:58,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48510 to 47991. [2021-06-05 14:05:58,062 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 14:05:58,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47991 states to 47991 states and 142732 transitions. [2021-06-05 14:05:58,164 INFO L78 Accepts]: Start accepts. Automaton has 47991 states and 142732 transitions. Word has length 25 [2021-06-05 14:05:58,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:05:58,165 INFO L482 AbstractCegarLoop]: Abstraction has 47991 states and 142732 transitions. [2021-06-05 14:05:58,165 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 14:05:58,165 INFO L276 IsEmpty]: Start isEmpty. Operand 47991 states and 142732 transitions. [2021-06-05 14:05:58,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:05:58,208 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:05:58,208 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:05:58,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20234,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:05:58,409 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:05:58,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:05:58,409 INFO L82 PathProgramCache]: Analyzing trace with hash -800059932, now seen corresponding path program 433 times [2021-06-05 14:05:58,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:05:58,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367250834] [2021-06-05 14:05:58,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:05:58,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:58,487 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 14:05:58,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:05:58,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367250834] [2021-06-05 14:05:58,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367250834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:58,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674707244] [2021-06-05 14:05:58,488 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 14:05:58,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:05:58,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:05:58,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:05:58,565 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 14:05:58,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674707244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:05:58,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:05:58,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 14:05:58,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275140436] [2021-06-05 14:05:58,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:05:58,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:05:58,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:05:58,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:05:58,566 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 14:05:58,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:05:58,899 INFO L93 Difference]: Finished difference Result 56834 states and 167301 transitions. [2021-06-05 14:05:58,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:05:58,900 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 14:05:58,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:05:59,014 INFO L225 Difference]: With dead ends: 56834 [2021-06-05 14:05:59,015 INFO L226 Difference]: Without dead ends: 56834 [2021-06-05 14:05:59,015 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 156.3ms TimeCoverageRelationStatistics Valid=313, Invalid=557, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:05:59,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56834 states. [2021-06-05 14:05:59,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56834 to 38382. [2021-06-05 14:05:59,959 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 14:06:00,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38382 states to 38382 states and 113825 transitions. [2021-06-05 14:06:00,046 INFO L78 Accepts]: Start accepts. Automaton has 38382 states and 113825 transitions. Word has length 25 [2021-06-05 14:06:00,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:06:00,046 INFO L482 AbstractCegarLoop]: Abstraction has 38382 states and 113825 transitions. [2021-06-05 14:06:00,046 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 14:06:00,046 INFO L276 IsEmpty]: Start isEmpty. Operand 38382 states and 113825 transitions. [2021-06-05 14:06:00,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:06:00,083 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:06:00,083 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:06:00,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 435 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20235 [2021-06-05 14:06:00,284 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:06:00,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:06:00,284 INFO L82 PathProgramCache]: Analyzing trace with hash -26868346, now seen corresponding path program 434 times [2021-06-05 14:06:00,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:06:00,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765976698] [2021-06-05 14:06:00,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:06:00,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:00,342 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 14:06:00,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:06:00,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765976698] [2021-06-05 14:06:00,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765976698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:00,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492584381] [2021-06-05 14:06:00,342 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 14:06:00,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:06:00,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:06:00,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:06:00,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:06:00,407 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 14:06:00,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492584381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:00,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:06:00,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:06:00,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089624965] [2021-06-05 14:06:00,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:06:00,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:06:00,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:06:00,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:06:00,409 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 14:06:00,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:06:00,961 INFO L93 Difference]: Finished difference Result 38968 states and 114634 transitions. [2021-06-05 14:06:00,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:06:00,962 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 14:06:00,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:06:01,023 INFO L225 Difference]: With dead ends: 38968 [2021-06-05 14:06:01,023 INFO L226 Difference]: Without dead ends: 38964 [2021-06-05 14:06:01,024 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 119.7ms TimeCoverageRelationStatistics Valid=242, Invalid=408, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:06:01,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38964 states. [2021-06-05 14:06:01,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38964 to 38396. [2021-06-05 14:06:01,579 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 14:06:01,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38396 states to 38396 states and 113863 transitions. [2021-06-05 14:06:01,663 INFO L78 Accepts]: Start accepts. Automaton has 38396 states and 113863 transitions. Word has length 25 [2021-06-05 14:06:01,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:06:01,663 INFO L482 AbstractCegarLoop]: Abstraction has 38396 states and 113863 transitions. [2021-06-05 14:06:01,663 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 14:06:01,663 INFO L276 IsEmpty]: Start isEmpty. Operand 38396 states and 113863 transitions. [2021-06-05 14:06:01,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:06:01,701 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:06:01,701 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:06:01,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20236,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:06:01,902 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:06:01,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:06:01,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1690880714, now seen corresponding path program 435 times [2021-06-05 14:06:01,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:06:01,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38822524] [2021-06-05 14:06:01,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:06:01,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:01,961 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 14:06:01,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:06:01,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38822524] [2021-06-05 14:06:01,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38822524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:01,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201301370] [2021-06-05 14:06:01,962 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 14:06:01,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 14:06:01,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:06:01,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:06:01,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:06:02,038 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 14:06:02,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201301370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:02,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:06:02,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:06:02,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167135389] [2021-06-05 14:06:02,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:06:02,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:06:02,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:06:02,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:06:02,039 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 14:06:02,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:06:02,454 INFO L93 Difference]: Finished difference Result 41573 states and 121933 transitions. [2021-06-05 14:06:02,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:06:02,454 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 14:06:02,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:06:02,511 INFO L225 Difference]: With dead ends: 41573 [2021-06-05 14:06:02,511 INFO L226 Difference]: Without dead ends: 41573 [2021-06-05 14:06:02,511 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 74.2ms TimeCoverageRelationStatistics Valid=144, Invalid=198, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:06:02,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41573 states. [2021-06-05 14:06:03,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41573 to 38413. [2021-06-05 14:06:03,062 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 14:06:03,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38413 states to 38413 states and 113905 transitions. [2021-06-05 14:06:03,139 INFO L78 Accepts]: Start accepts. Automaton has 38413 states and 113905 transitions. Word has length 25 [2021-06-05 14:06:03,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:06:03,139 INFO L482 AbstractCegarLoop]: Abstraction has 38413 states and 113905 transitions. [2021-06-05 14:06:03,139 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 14:06:03,139 INFO L276 IsEmpty]: Start isEmpty. Operand 38413 states and 113905 transitions. [2021-06-05 14:06:03,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:06:03,174 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:06:03,174 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:06:03,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 437 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20237 [2021-06-05 14:06:03,374 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:06:03,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:06:03,374 INFO L82 PathProgramCache]: Analyzing trace with hash -38166620, now seen corresponding path program 436 times [2021-06-05 14:06:03,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:06:03,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601004612] [2021-06-05 14:06:03,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:06:03,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:03,435 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 14:06:03,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:06:03,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601004612] [2021-06-05 14:06:03,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601004612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:03,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12244848] [2021-06-05 14:06:03,436 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 14:06:03,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:06:03,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:06:03,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:06:03,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:06:03,513 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 14:06:03,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12244848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:03,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:06:03,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 14:06:03,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240355119] [2021-06-05 14:06:03,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:06:03,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:06:03,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:06:03,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:06:03,514 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 14:06:03,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:06:03,900 INFO L93 Difference]: Finished difference Result 43427 states and 127338 transitions. [2021-06-05 14:06:03,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:06:03,900 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 14:06:03,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:06:03,978 INFO L225 Difference]: With dead ends: 43427 [2021-06-05 14:06:03,978 INFO L226 Difference]: Without dead ends: 43427 [2021-06-05 14:06:03,978 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 93.9ms TimeCoverageRelationStatistics Valid=183, Invalid=279, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:06:04,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43427 states. [2021-06-05 14:06:04,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43427 to 38418. [2021-06-05 14:06:04,647 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 14:06:04,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38418 states to 38418 states and 113914 transitions. [2021-06-05 14:06:04,728 INFO L78 Accepts]: Start accepts. Automaton has 38418 states and 113914 transitions. Word has length 25 [2021-06-05 14:06:04,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:06:04,728 INFO L482 AbstractCegarLoop]: Abstraction has 38418 states and 113914 transitions. [2021-06-05 14:06:04,729 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 14:06:04,729 INFO L276 IsEmpty]: Start isEmpty. Operand 38418 states and 113914 transitions. [2021-06-05 14:06:04,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:06:04,764 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:06:04,764 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:06:04,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20238,438 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:06:04,965 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:06:04,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:06:04,965 INFO L82 PathProgramCache]: Analyzing trace with hash -2099026422, now seen corresponding path program 437 times [2021-06-05 14:06:04,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:06:04,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876106848] [2021-06-05 14:06:04,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:06:04,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:05,038 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 14:06:05,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:06:05,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876106848] [2021-06-05 14:06:05,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876106848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:05,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451280089] [2021-06-05 14:06:05,039 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 14:06:05,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 14:06:05,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:06:05,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:06:05,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:06:05,118 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 14:06:05,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451280089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:05,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:06:05,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:06:05,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175902714] [2021-06-05 14:06:05,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:06:05,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:06:05,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:06:05,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:06:05,119 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 14:06:05,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:06:05,438 INFO L93 Difference]: Finished difference Result 42897 states and 125903 transitions. [2021-06-05 14:06:05,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:06:05,438 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 14:06:05,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:06:05,505 INFO L225 Difference]: With dead ends: 42897 [2021-06-05 14:06:05,506 INFO L226 Difference]: Without dead ends: 42897 [2021-06-05 14:06:05,506 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 205.0ms TimeCoverageRelationStatistics Valid=191, Invalid=315, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:06:05,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42897 states. [2021-06-05 14:06:06,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42897 to 38354. [2021-06-05 14:06:06,103 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 14:06:06,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38354 states to 38354 states and 113703 transitions. [2021-06-05 14:06:06,194 INFO L78 Accepts]: Start accepts. Automaton has 38354 states and 113703 transitions. Word has length 25 [2021-06-05 14:06:06,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:06:06,194 INFO L482 AbstractCegarLoop]: Abstraction has 38354 states and 113703 transitions. [2021-06-05 14:06:06,194 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 14:06:06,195 INFO L276 IsEmpty]: Start isEmpty. Operand 38354 states and 113703 transitions. [2021-06-05 14:06:06,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:06:06,231 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:06:06,231 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:06:06,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20239,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:06:06,432 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:06:06,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:06:06,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1561170844, now seen corresponding path program 438 times [2021-06-05 14:06:06,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:06:06,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702785242] [2021-06-05 14:06:06,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:06:06,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:06,503 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 14:06:06,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:06:06,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702785242] [2021-06-05 14:06:06,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702785242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:06,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728136552] [2021-06-05 14:06:06,503 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 14:06:06,533 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 14:06:06,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:06:06,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:06:06,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:06:06,760 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 14:06:06,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728136552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:06,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:06:06,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:06:06,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900112287] [2021-06-05 14:06:06,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:06:06,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:06:06,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:06:06,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:06:06,761 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 14:06:07,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:06:07,051 INFO L93 Difference]: Finished difference Result 63716 states and 189177 transitions. [2021-06-05 14:06:07,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:06:07,052 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 14:06:07,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:06:07,178 INFO L225 Difference]: With dead ends: 63716 [2021-06-05 14:06:07,179 INFO L226 Difference]: Without dead ends: 63716 [2021-06-05 14:06:07,179 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 94.6ms TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:06:07,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63716 states. [2021-06-05 14:06:08,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63716 to 58655. [2021-06-05 14:06:08,280 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 14:06:08,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58655 states to 58655 states and 175565 transitions. [2021-06-05 14:06:08,417 INFO L78 Accepts]: Start accepts. Automaton has 58655 states and 175565 transitions. Word has length 25 [2021-06-05 14:06:08,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:06:08,417 INFO L482 AbstractCegarLoop]: Abstraction has 58655 states and 175565 transitions. [2021-06-05 14:06:08,417 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 14:06:08,417 INFO L276 IsEmpty]: Start isEmpty. Operand 58655 states and 175565 transitions. [2021-06-05 14:06:08,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:06:08,464 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:06:08,464 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:06:08,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20240,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:06:08,664 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:06:08,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:06:08,665 INFO L82 PathProgramCache]: Analyzing trace with hash -2067517110, now seen corresponding path program 439 times [2021-06-05 14:06:08,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:06:08,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768231213] [2021-06-05 14:06:08,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:06:08,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:08,743 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 14:06:08,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:06:08,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768231213] [2021-06-05 14:06:08,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768231213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:08,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906817706] [2021-06-05 14:06:08,744 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 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 14:06:08,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:08,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:06:08,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:06:08,821 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 14:06:08,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906817706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:08,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:06:08,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 14:06:08,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964268103] [2021-06-05 14:06:08,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:06:08,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:06:08,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:06:08,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:06:08,822 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 14:06:09,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:06:09,194 INFO L93 Difference]: Finished difference Result 65878 states and 195353 transitions. [2021-06-05 14:06:09,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:06:09,194 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 14:06:09,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:06:09,324 INFO L225 Difference]: With dead ends: 65878 [2021-06-05 14:06:09,324 INFO L226 Difference]: Without dead ends: 65878 [2021-06-05 14:06:09,324 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 136.6ms TimeCoverageRelationStatistics Valid=247, Invalid=455, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:06:09,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65878 states. [2021-06-05 14:06:10,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65878 to 58492. [2021-06-05 14:06:10,536 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 14:06:11,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58492 states to 58492 states and 175036 transitions. [2021-06-05 14:06:11,013 INFO L78 Accepts]: Start accepts. Automaton has 58492 states and 175036 transitions. Word has length 25 [2021-06-05 14:06:11,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:06:11,013 INFO L482 AbstractCegarLoop]: Abstraction has 58492 states and 175036 transitions. [2021-06-05 14:06:11,013 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 14:06:11,013 INFO L276 IsEmpty]: Start isEmpty. Operand 58492 states and 175036 transitions. [2021-06-05 14:06:11,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:06:11,073 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:06:11,073 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:06:11,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20241 [2021-06-05 14:06:11,273 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:06:11,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:06:11,274 INFO L82 PathProgramCache]: Analyzing trace with hash -584382172, now seen corresponding path program 440 times [2021-06-05 14:06:11,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:06:11,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422946448] [2021-06-05 14:06:11,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:06:11,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:11,366 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 14:06:11,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:06:11,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422946448] [2021-06-05 14:06:11,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422946448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:11,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542326075] [2021-06-05 14:06:11,367 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 14:06:11,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:06:11,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:06:11,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:06:11,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:06:11,453 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 14:06:11,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542326075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:11,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:06:11,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 14:06:11,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491711030] [2021-06-05 14:06:11,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:06:11,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:06:11,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:06:11,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:06:11,454 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 14:06:11,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:06:11,967 INFO L93 Difference]: Finished difference Result 92257 states and 276233 transitions. [2021-06-05 14:06:11,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:06:11,968 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 14:06:11,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:06:12,150 INFO L225 Difference]: With dead ends: 92257 [2021-06-05 14:06:12,151 INFO L226 Difference]: Without dead ends: 92257 [2021-06-05 14:06:12,151 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 212.9ms TimeCoverageRelationStatistics Valid=418, Invalid=772, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:06:12,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92257 states. [2021-06-05 14:06:13,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92257 to 82743. [2021-06-05 14:06:13,949 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 14:06:14,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82743 states to 82743 states and 249869 transitions. [2021-06-05 14:06:14,176 INFO L78 Accepts]: Start accepts. Automaton has 82743 states and 249869 transitions. Word has length 25 [2021-06-05 14:06:14,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:06:14,176 INFO L482 AbstractCegarLoop]: Abstraction has 82743 states and 249869 transitions. [2021-06-05 14:06:14,176 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 14:06:14,176 INFO L276 IsEmpty]: Start isEmpty. Operand 82743 states and 249869 transitions. [2021-06-05 14:06:14,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:06:14,251 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:06:14,251 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:06:14,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20242,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:06:14,452 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:06:14,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:06:14,452 INFO L82 PathProgramCache]: Analyzing trace with hash 583094636, now seen corresponding path program 441 times [2021-06-05 14:06:14,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:06:14,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662911319] [2021-06-05 14:06:14,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:06:14,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:14,525 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 14:06:14,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:06:14,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662911319] [2021-06-05 14:06:14,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662911319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:14,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779794162] [2021-06-05 14:06:14,525 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 14:06:14,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 14:06:14,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:06:14,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:06:14,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:06:14,601 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 14:06:14,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779794162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:14,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:06:14,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 14:06:14,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094513137] [2021-06-05 14:06:14,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:06:14,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:06:14,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:06:14,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:06:14,602 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 14:06:14,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:06:14,980 INFO L93 Difference]: Finished difference Result 83322 states and 250595 transitions. [2021-06-05 14:06:14,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:06:14,980 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 14:06:14,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:06:15,153 INFO L225 Difference]: With dead ends: 83322 [2021-06-05 14:06:15,153 INFO L226 Difference]: Without dead ends: 83321 [2021-06-05 14:06:15,154 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 90.3ms TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:06:15,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83321 states. [2021-06-05 14:06:17,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83321 to 82266. [2021-06-05 14:06:17,114 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 14:06:17,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82266 states to 82266 states and 248315 transitions. [2021-06-05 14:06:17,356 INFO L78 Accepts]: Start accepts. Automaton has 82266 states and 248315 transitions. Word has length 25 [2021-06-05 14:06:17,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:06:17,356 INFO L482 AbstractCegarLoop]: Abstraction has 82266 states and 248315 transitions. [2021-06-05 14:06:17,356 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 14:06:17,356 INFO L276 IsEmpty]: Start isEmpty. Operand 82266 states and 248315 transitions. [2021-06-05 14:06:17,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:06:17,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:06:17,429 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:06:17,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 443 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20243 [2021-06-05 14:06:17,630 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:06:17,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:06:17,630 INFO L82 PathProgramCache]: Analyzing trace with hash 76748370, now seen corresponding path program 442 times [2021-06-05 14:06:17,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:06:17,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968489784] [2021-06-05 14:06:17,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:06:17,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:17,709 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 14:06:17,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:06:17,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968489784] [2021-06-05 14:06:17,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968489784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:17,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70584128] [2021-06-05 14:06:17,710 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 14:06:17,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:06:17,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:06:17,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:06:17,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:06:17,780 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 14:06:17,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70584128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:17,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:06:17,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-05 14:06:17,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988068261] [2021-06-05 14:06:17,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:06:17,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:06:17,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:06:17,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:06:17,781 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 14:06:18,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:06:18,235 INFO L93 Difference]: Finished difference Result 90893 states and 272842 transitions. [2021-06-05 14:06:18,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:06:18,235 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 14:06:18,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:06:18,450 INFO L225 Difference]: With dead ends: 90893 [2021-06-05 14:06:18,450 INFO L226 Difference]: Without dead ends: 90893 [2021-06-05 14:06:18,450 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 130.0ms TimeCoverageRelationStatistics Valid=246, Invalid=456, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:06:18,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90893 states. [2021-06-05 14:06:20,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90893 to 54760. [2021-06-05 14:06:20,222 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 14:06:20,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54760 states to 54760 states and 163297 transitions. [2021-06-05 14:06:20,695 INFO L78 Accepts]: Start accepts. Automaton has 54760 states and 163297 transitions. Word has length 25 [2021-06-05 14:06:20,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:06:20,696 INFO L482 AbstractCegarLoop]: Abstraction has 54760 states and 163297 transitions. [2021-06-05 14:06:20,696 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 14:06:20,696 INFO L276 IsEmpty]: Start isEmpty. Operand 54760 states and 163297 transitions. [2021-06-05 14:06:20,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:06:20,739 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:06:20,739 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:06:20,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20244,444 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:06:20,940 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:06:20,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:06:20,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1559883308, now seen corresponding path program 443 times [2021-06-05 14:06:20,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:06:20,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013520028] [2021-06-05 14:06:20,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:06:20,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:21,036 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 14:06:21,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:06:21,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013520028] [2021-06-05 14:06:21,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013520028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:21,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441262467] [2021-06-05 14:06:21,036 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 14:06:21,066 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 14:06:21,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:06:21,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:06:21,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:06:21,110 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 14:06:21,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441262467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:21,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:06:21,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-05 14:06:21,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188090715] [2021-06-05 14:06:21,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:06:21,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:06:21,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:06:21,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:06:21,111 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 14:06:21,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:06:21,561 INFO L93 Difference]: Finished difference Result 77734 states and 230348 transitions. [2021-06-05 14:06:21,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:06:21,561 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 14:06:21,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:06:21,710 INFO L225 Difference]: With dead ends: 77734 [2021-06-05 14:06:21,710 INFO L226 Difference]: Without dead ends: 77734 [2021-06-05 14:06:21,711 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 195.2ms TimeCoverageRelationStatistics Valid=417, Invalid=773, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:06:21,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77734 states. [2021-06-05 14:06:22,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77734 to 43949. [2021-06-05 14:06:22,850 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 14:06:22,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43949 states to 43949 states and 130505 transitions. [2021-06-05 14:06:22,938 INFO L78 Accepts]: Start accepts. Automaton has 43949 states and 130505 transitions. Word has length 25 [2021-06-05 14:06:22,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:06:22,938 INFO L482 AbstractCegarLoop]: Abstraction has 43949 states and 130505 transitions. [2021-06-05 14:06:22,938 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 14:06:22,938 INFO L276 IsEmpty]: Start isEmpty. Operand 43949 states and 130505 transitions. [2021-06-05 14:06:22,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:06:22,978 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:06:22,979 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:06:23,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20245 [2021-06-05 14:06:23,179 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:06:23,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:06:23,179 INFO L82 PathProgramCache]: Analyzing trace with hash -990719982, now seen corresponding path program 444 times [2021-06-05 14:06:23,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:06:23,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040972640] [2021-06-05 14:06:23,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:06:23,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:23,278 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 14:06:23,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:06:23,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040972640] [2021-06-05 14:06:23,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040972640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:23,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180764492] [2021-06-05 14:06:23,278 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 14:06:23,320 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 14:06:23,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:06:23,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:06:23,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:06:23,372 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 14:06:23,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180764492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:23,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:06:23,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-05 14:06:23,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613319298] [2021-06-05 14:06:23,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:06:23,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:06:23,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:06:23,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:06:23,373 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 14:06:23,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:06:23,795 INFO L93 Difference]: Finished difference Result 74263 states and 220319 transitions. [2021-06-05 14:06:23,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:06:23,795 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 14:06:23,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:06:23,938 INFO L225 Difference]: With dead ends: 74263 [2021-06-05 14:06:23,938 INFO L226 Difference]: Without dead ends: 74263 [2021-06-05 14:06:23,938 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 205.1ms TimeCoverageRelationStatistics Valid=370, Invalid=686, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:06:24,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74263 states. [2021-06-05 14:06:25,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74263 to 67922. [2021-06-05 14:06:25,443 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 14:06:25,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67922 states to 67922 states and 202994 transitions. [2021-06-05 14:06:25,606 INFO L78 Accepts]: Start accepts. Automaton has 67922 states and 202994 transitions. Word has length 25 [2021-06-05 14:06:25,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:06:25,606 INFO L482 AbstractCegarLoop]: Abstraction has 67922 states and 202994 transitions. [2021-06-05 14:06:25,606 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 14:06:25,606 INFO L276 IsEmpty]: Start isEmpty. Operand 67922 states and 202994 transitions. [2021-06-05 14:06:25,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:06:25,654 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:06:25,654 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:06:25,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 446 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20246 [2021-06-05 14:06:25,855 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:06:25,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:06:25,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1069673010, now seen corresponding path program 445 times [2021-06-05 14:06:25,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:06:25,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292102898] [2021-06-05 14:06:25,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:06:25,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:25,912 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 14:06:25,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:06:25,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292102898] [2021-06-05 14:06:25,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292102898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:25,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872166597] [2021-06-05 14:06:25,912 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 14:06:25,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:25,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:06:25,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:06:25,977 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 14:06:25,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872166597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:25,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:06:25,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:06:25,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774871271] [2021-06-05 14:06:25,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:06:25,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:06:25,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:06:25,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:06:25,978 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 14:06:26,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:06:26,364 INFO L93 Difference]: Finished difference Result 68435 states and 203689 transitions. [2021-06-05 14:06:26,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:06:26,365 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 14:06:26,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:06:26,496 INFO L225 Difference]: With dead ends: 68435 [2021-06-05 14:06:26,496 INFO L226 Difference]: Without dead ends: 68431 [2021-06-05 14:06:26,496 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 116.8ms TimeCoverageRelationStatistics Valid=241, Invalid=409, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:06:26,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68431 states. [2021-06-05 14:06:27,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68431 to 67936. [2021-06-05 14:06:27,901 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 14:06:28,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67936 states to 67936 states and 203007 transitions. [2021-06-05 14:06:28,428 INFO L78 Accepts]: Start accepts. Automaton has 67936 states and 203007 transitions. Word has length 25 [2021-06-05 14:06:28,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:06:28,428 INFO L482 AbstractCegarLoop]: Abstraction has 67936 states and 203007 transitions. [2021-06-05 14:06:28,428 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 14:06:28,429 INFO L276 IsEmpty]: Start isEmpty. Operand 67936 states and 203007 transitions. [2021-06-05 14:06:28,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:06:28,473 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:06:28,473 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:06:28,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 447 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20247 [2021-06-05 14:06:28,674 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:06:28,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:06:28,674 INFO L82 PathProgramCache]: Analyzing trace with hash 648076050, now seen corresponding path program 446 times [2021-06-05 14:06:28,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:06:28,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428943330] [2021-06-05 14:06:28,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:06:28,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:28,740 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 14:06:28,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:06:28,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428943330] [2021-06-05 14:06:28,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428943330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:28,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449077299] [2021-06-05 14:06:28,741 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 14:06:28,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:06:28,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:06:28,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:06:28,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:06:28,823 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 14:06:28,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449077299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:28,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:06:28,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:06:28,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951633534] [2021-06-05 14:06:28,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:06:28,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:06:28,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:06:28,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:06:28,824 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 14:06:29,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:06:29,157 INFO L93 Difference]: Finished difference Result 74376 states and 220879 transitions. [2021-06-05 14:06:29,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:06:29,158 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 14:06:29,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:06:29,309 INFO L225 Difference]: With dead ends: 74376 [2021-06-05 14:06:29,309 INFO L226 Difference]: Without dead ends: 74376 [2021-06-05 14:06:29,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 84.0ms TimeCoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:06:29,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74376 states. [2021-06-05 14:06:30,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74376 to 67967. [2021-06-05 14:06:30,673 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 14:06:30,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67967 states to 67967 states and 203093 transitions. [2021-06-05 14:06:30,829 INFO L78 Accepts]: Start accepts. Automaton has 67967 states and 203093 transitions. Word has length 25 [2021-06-05 14:06:30,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:06:30,830 INFO L482 AbstractCegarLoop]: Abstraction has 67967 states and 203093 transitions. [2021-06-05 14:06:30,830 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 14:06:30,830 INFO L276 IsEmpty]: Start isEmpty. Operand 67967 states and 203093 transitions. [2021-06-05 14:06:30,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:06:30,879 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:06:30,879 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:06:31,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 448 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20248 [2021-06-05 14:06:31,079 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:06:31,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:06:31,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1080971284, now seen corresponding path program 447 times [2021-06-05 14:06:31,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:06:31,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081736050] [2021-06-05 14:06:31,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:06:31,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:31,143 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 14:06:31,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:06:31,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081736050] [2021-06-05 14:06:31,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081736050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:31,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778382736] [2021-06-05 14:06:31,143 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 14:06:31,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 14:06:31,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:06:31,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:06:31,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:06:31,218 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 14:06:31,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778382736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:31,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:06:31,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:06:31,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871721875] [2021-06-05 14:06:31,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:06:31,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:06:31,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:06:31,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:06:31,219 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 14:06:31,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:06:31,821 INFO L93 Difference]: Finished difference Result 78884 states and 234170 transitions. [2021-06-05 14:06:31,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:06:31,822 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 14:06:31,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:06:31,978 INFO L225 Difference]: With dead ends: 78884 [2021-06-05 14:06:31,979 INFO L226 Difference]: Without dead ends: 78884 [2021-06-05 14:06:31,979 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 103.8ms TimeCoverageRelationStatistics Valid=215, Invalid=337, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:06:32,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78884 states. [2021-06-05 14:06:33,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78884 to 67988. [2021-06-05 14:06:33,378 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 14:06:33,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67988 states to 67988 states and 203150 transitions. [2021-06-05 14:06:33,571 INFO L78 Accepts]: Start accepts. Automaton has 67988 states and 203150 transitions. Word has length 25 [2021-06-05 14:06:33,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:06:33,571 INFO L482 AbstractCegarLoop]: Abstraction has 67988 states and 203150 transitions. [2021-06-05 14:06:33,571 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 14:06:33,571 INFO L276 IsEmpty]: Start isEmpty. Operand 67988 states and 203150 transitions. [2021-06-05 14:06:33,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:06:33,638 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:06:33,638 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:06:33,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20249,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:06:33,861 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:06:33,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:06:33,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1153136210, now seen corresponding path program 448 times [2021-06-05 14:06:33,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:06:33,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367888991] [2021-06-05 14:06:33,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:06:33,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:33,939 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 14:06:33,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:06:33,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367888991] [2021-06-05 14:06:33,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367888991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:33,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460849301] [2021-06-05 14:06:33,940 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 14:06:33,973 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:06:33,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:06:33,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:06:33,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:06:34,027 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 14:06:34,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460849301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:34,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:06:34,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:06:34,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208081019] [2021-06-05 14:06:34,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:06:34,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:06:34,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:06:34,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:06:34,029 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 14:06:35,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:06:35,216 INFO L93 Difference]: Finished difference Result 114424 states and 344057 transitions. [2021-06-05 14:06:35,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:06:35,216 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 14:06:35,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:06:35,665 INFO L225 Difference]: With dead ends: 114424 [2021-06-05 14:06:35,666 INFO L226 Difference]: Without dead ends: 114424 [2021-06-05 14:06:35,666 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 128.4ms TimeCoverageRelationStatistics Valid=224, Invalid=376, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:06:35,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114424 states. [2021-06-05 14:06:37,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114424 to 104105. [2021-06-05 14:06:37,528 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 14:06:37,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104105 states to 104105 states and 314954 transitions. [2021-06-05 14:06:37,814 INFO L78 Accepts]: Start accepts. Automaton has 104105 states and 314954 transitions. Word has length 25 [2021-06-05 14:06:37,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:06:37,814 INFO L482 AbstractCegarLoop]: Abstraction has 104105 states and 314954 transitions. [2021-06-05 14:06:37,814 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 14:06:37,814 INFO L276 IsEmpty]: Start isEmpty. Operand 104105 states and 314954 transitions. [2021-06-05 14:06:38,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:06:38,345 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:06:38,345 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:06:38,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20250,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:06:38,546 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:06:38,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:06:38,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1690991788, now seen corresponding path program 449 times [2021-06-05 14:06:38,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:06:38,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100902481] [2021-06-05 14:06:38,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:06:38,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:38,621 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 14:06:38,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:06:38,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100902481] [2021-06-05 14:06:38,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100902481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:38,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847230437] [2021-06-05 14:06:38,621 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 14:06:38,650 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 14:06:38,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:06:38,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:06:38,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:06:38,695 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 14:06:38,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847230437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:38,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:06:38,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 14:06:38,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13467361] [2021-06-05 14:06:38,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:06:38,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:06:38,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:06:38,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:06:38,696 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 14:06:39,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:06:39,210 INFO L93 Difference]: Finished difference Result 110268 states and 331729 transitions. [2021-06-05 14:06:39,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:06:39,210 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 14:06:39,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:06:39,451 INFO L225 Difference]: With dead ends: 110268 [2021-06-05 14:06:39,452 INFO L226 Difference]: Without dead ends: 110268 [2021-06-05 14:06:39,452 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 116.4ms TimeCoverageRelationStatistics Valid=215, Invalid=385, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:06:39,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110268 states. [2021-06-05 14:06:41,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110268 to 102357. [2021-06-05 14:06:41,709 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 14:06:41,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102357 states to 102357 states and 309397 transitions. [2021-06-05 14:06:41,985 INFO L78 Accepts]: Start accepts. Automaton has 102357 states and 309397 transitions. Word has length 25 [2021-06-05 14:06:41,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:06:41,985 INFO L482 AbstractCegarLoop]: Abstraction has 102357 states and 309397 transitions. [2021-06-05 14:06:41,985 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 14:06:41,985 INFO L276 IsEmpty]: Start isEmpty. Operand 102357 states and 309397 transitions. [2021-06-05 14:06:42,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:06:42,052 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:06:42,052 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:06:42,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20251,451 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:06:42,252 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:06:42,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:06:42,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1184645522, now seen corresponding path program 450 times [2021-06-05 14:06:42,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:06:42,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040970142] [2021-06-05 14:06:42,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:06:42,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:42,329 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 14:06:42,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:06:42,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040970142] [2021-06-05 14:06:42,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040970142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:42,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696774727] [2021-06-05 14:06:42,329 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 14:06:42,357 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 14:06:42,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:06:42,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:06:42,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:06:42,402 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 14:06:42,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696774727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:42,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:06:42,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 14:06:42,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307221210] [2021-06-05 14:06:42,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:06:42,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:06:42,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:06:42,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:06:42,403 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 14:06:43,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:06:43,745 INFO L93 Difference]: Finished difference Result 187580 states and 568248 transitions. [2021-06-05 14:06:43,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:06:43,746 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 14:06:43,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:06:44,232 INFO L225 Difference]: With dead ends: 187580 [2021-06-05 14:06:44,232 INFO L226 Difference]: Without dead ends: 187580 [2021-06-05 14:06:44,232 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 106.5ms TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:06:44,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187580 states. [2021-06-05 14:06:47,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187580 to 185975. [2021-06-05 14:06:48,035 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 14:06:48,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185975 states to 185975 states and 564688 transitions. [2021-06-05 14:06:48,667 INFO L78 Accepts]: Start accepts. Automaton has 185975 states and 564688 transitions. Word has length 25 [2021-06-05 14:06:48,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:06:48,667 INFO L482 AbstractCegarLoop]: Abstraction has 185975 states and 564688 transitions. [2021-06-05 14:06:48,667 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 14:06:48,667 INFO L276 IsEmpty]: Start isEmpty. Operand 185975 states and 564688 transitions. [2021-06-05 14:06:48,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:06:48,764 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:06:48,764 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:06:48,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20252 [2021-06-05 14:06:48,964 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:06:48,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:06:48,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1627186836, now seen corresponding path program 451 times [2021-06-05 14:06:48,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:06:48,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869384000] [2021-06-05 14:06:48,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:06:48,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:49,049 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 14:06:49,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:06:49,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869384000] [2021-06-05 14:06:49,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869384000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:49,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627271028] [2021-06-05 14:06:49,049 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 14:06:49,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:49,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:06:49,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:06:49,120 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 14:06:49,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627271028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:49,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:06:49,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-05 14:06:49,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757736729] [2021-06-05 14:06:49,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:06:49,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:06:49,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:06:49,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:06:49,121 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 14:06:50,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:06:50,747 INFO L93 Difference]: Finished difference Result 189635 states and 574166 transitions. [2021-06-05 14:06:50,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:06:50,748 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 14:06:50,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:06:51,207 INFO L225 Difference]: With dead ends: 189635 [2021-06-05 14:06:51,207 INFO L226 Difference]: Without dead ends: 189635 [2021-06-05 14:06:51,207 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 157.5ms TimeCoverageRelationStatistics Valid=295, Invalid=575, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:06:51,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189635 states. [2021-06-05 14:06:54,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189635 to 184848. [2021-06-05 14:06:55,037 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 14:06:55,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184848 states to 184848 states and 561213 transitions. [2021-06-05 14:06:55,637 INFO L78 Accepts]: Start accepts. Automaton has 184848 states and 561213 transitions. Word has length 25 [2021-06-05 14:06:55,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:06:55,637 INFO L482 AbstractCegarLoop]: Abstraction has 184848 states and 561213 transitions. [2021-06-05 14:06:55,637 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 14:06:55,637 INFO L276 IsEmpty]: Start isEmpty. Operand 184848 states and 561213 transitions. [2021-06-05 14:06:55,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:06:55,730 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:06:55,730 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:06:55,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20253,453 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:06:55,930 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:06:55,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:06:55,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1400323282, now seen corresponding path program 452 times [2021-06-05 14:06:55,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:06:55,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779997127] [2021-06-05 14:06:55,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:06:55,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:06:56,046 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 14:06:56,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:06:56,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779997127] [2021-06-05 14:06:56,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779997127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:56,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243006333] [2021-06-05 14:06:56,046 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 14:06:56,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:06:56,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:06:56,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:06:56,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:06:56,118 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 14:06:56,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243006333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:06:56,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:06:56,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-05 14:06:56,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91714761] [2021-06-05 14:06:56,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:06:56,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:06:56,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:06:56,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:06:56,119 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 14:06:58,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:06:58,113 INFO L93 Difference]: Finished difference Result 276211 states and 836546 transitions. [2021-06-05 14:06:58,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 14:06:58,113 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 14:06:58,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:06:58,845 INFO L225 Difference]: With dead ends: 276211 [2021-06-05 14:06:58,845 INFO L226 Difference]: Without dead ends: 276211 [2021-06-05 14:06:58,845 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 257.5ms TimeCoverageRelationStatistics Valid=535, Invalid=1025, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 14:06:59,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276211 states. [2021-06-05 14:07:04,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276211 to 269074. [2021-06-05 14:07:04,926 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 14:07:05,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269074 states to 269074 states and 817061 transitions. [2021-06-05 14:07:05,890 INFO L78 Accepts]: Start accepts. Automaton has 269074 states and 817061 transitions. Word has length 25 [2021-06-05 14:07:05,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:05,890 INFO L482 AbstractCegarLoop]: Abstraction has 269074 states and 817061 transitions. [2021-06-05 14:07:05,891 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 14:07:05,891 INFO L276 IsEmpty]: Start isEmpty. Operand 269074 states and 817061 transitions. [2021-06-05 14:07:05,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:07:05,993 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:05,994 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:06,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20254 [2021-06-05 14:07:06,194 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:06,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:06,194 INFO L82 PathProgramCache]: Analyzing trace with hash -239563868, now seen corresponding path program 453 times [2021-06-05 14:07:06,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:06,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488396474] [2021-06-05 14:07:06,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:06,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:06,286 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 14:07:06,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:06,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488396474] [2021-06-05 14:07:06,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488396474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:06,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593949311] [2021-06-05 14:07:06,286 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 14:07:06,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 14:07:06,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:07:06,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:07:06,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:06,361 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 14:07:06,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593949311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:06,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:06,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-05 14:07:06,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020376862] [2021-06-05 14:07:06,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:07:06,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:06,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:07:06,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:07:06,362 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 14:07:08,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:08,422 INFO L93 Difference]: Finished difference Result 315035 states and 954004 transitions. [2021-06-05 14:07:08,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:07:08,423 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 14:07:08,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:09,180 INFO L225 Difference]: With dead ends: 315035 [2021-06-05 14:07:09,180 INFO L226 Difference]: Without dead ends: 315035 [2021-06-05 14:07:09,180 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 189.1ms TimeCoverageRelationStatistics Valid=369, Invalid=687, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:07:09,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315035 states. [2021-06-05 14:07:13,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315035 to 143842. [2021-06-05 14:07:13,990 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 14:07:14,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143842 states to 143842 states and 433461 transitions. [2021-06-05 14:07:14,475 INFO L78 Accepts]: Start accepts. Automaton has 143842 states and 433461 transitions. Word has length 25 [2021-06-05 14:07:14,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:14,475 INFO L482 AbstractCegarLoop]: Abstraction has 143842 states and 433461 transitions. [2021-06-05 14:07:14,475 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 14:07:14,475 INFO L276 IsEmpty]: Start isEmpty. Operand 143842 states and 433461 transitions. [2021-06-05 14:07:14,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:07:14,557 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:14,557 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:14,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20255 [2021-06-05 14:07:14,758 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:14,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:14,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1904292324, now seen corresponding path program 454 times [2021-06-05 14:07:14,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:14,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488052660] [2021-06-05 14:07:14,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:14,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:14,823 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 14:07:14,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:14,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488052660] [2021-06-05 14:07:14,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488052660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:14,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501788781] [2021-06-05 14:07:14,823 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 14:07:14,849 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:07:14,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:07:14,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:07:14,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:14,893 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 14:07:14,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501788781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:14,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:14,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 14:07:14,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144228692] [2021-06-05 14:07:14,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:07:14,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:14,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:07:14,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:07:14,894 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 14:07:15,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:15,616 INFO L93 Difference]: Finished difference Result 173347 states and 520424 transitions. [2021-06-05 14:07:15,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:07:15,616 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 14:07:15,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:15,998 INFO L225 Difference]: With dead ends: 173347 [2021-06-05 14:07:15,999 INFO L226 Difference]: Without dead ends: 173347 [2021-06-05 14:07:15,999 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 113.0ms TimeCoverageRelationStatistics Valid=223, Invalid=377, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:07:16,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173347 states. [2021-06-05 14:07:19,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173347 to 144026. [2021-06-05 14:07:19,610 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 14:07:19,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144026 states to 144026 states and 433986 transitions. [2021-06-05 14:07:19,993 INFO L78 Accepts]: Start accepts. Automaton has 144026 states and 433986 transitions. Word has length 25 [2021-06-05 14:07:19,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:19,993 INFO L482 AbstractCegarLoop]: Abstraction has 144026 states and 433986 transitions. [2021-06-05 14:07:19,993 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 14:07:19,993 INFO L276 IsEmpty]: Start isEmpty. Operand 144026 states and 433986 transitions. [2021-06-05 14:07:20,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:07:20,651 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:20,651 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:20,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 456 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20256 [2021-06-05 14:07:20,851 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:20,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:20,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1852819394, now seen corresponding path program 455 times [2021-06-05 14:07:20,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:20,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588528194] [2021-06-05 14:07:20,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:20,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:20,926 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 14:07:20,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:20,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588528194] [2021-06-05 14:07:20,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588528194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:20,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722725518] [2021-06-05 14:07:20,927 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 14:07:20,954 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 14:07:20,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:07:20,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:07:20,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:20,999 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 14:07:20,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722725518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:20,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:20,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 14:07:20,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579234311] [2021-06-05 14:07:20,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:07:20,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:20,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:07:21,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:07:21,000 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 14:07:21,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:21,696 INFO L93 Difference]: Finished difference Result 165051 states and 495636 transitions. [2021-06-05 14:07:21,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:07:21,696 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 14:07:21,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:22,064 INFO L225 Difference]: With dead ends: 165051 [2021-06-05 14:07:22,064 INFO L226 Difference]: Without dead ends: 165051 [2021-06-05 14:07:22,064 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 117.5ms TimeCoverageRelationStatistics Valid=214, Invalid=386, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:07:22,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165051 states. [2021-06-05 14:07:24,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165051 to 98547. [2021-06-05 14:07:24,863 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 14:07:25,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98547 states to 98547 states and 295810 transitions. [2021-06-05 14:07:25,124 INFO L78 Accepts]: Start accepts. Automaton has 98547 states and 295810 transitions. Word has length 25 [2021-06-05 14:07:25,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:25,124 INFO L482 AbstractCegarLoop]: Abstraction has 98547 states and 295810 transitions. [2021-06-05 14:07:25,124 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 14:07:25,124 INFO L276 IsEmpty]: Start isEmpty. Operand 98547 states and 295810 transitions. [2021-06-05 14:07:25,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:07:25,180 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:25,180 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:25,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20257 [2021-06-05 14:07:25,380 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:25,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:25,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1935801636, now seen corresponding path program 456 times [2021-06-05 14:07:25,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:25,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683446209] [2021-06-05 14:07:25,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:25,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:25,458 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 14:07:25,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:25,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683446209] [2021-06-05 14:07:25,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683446209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:25,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572682987] [2021-06-05 14:07:25,458 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 14:07:25,486 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 14:07:25,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:07:25,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:07:25,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:25,531 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 14:07:25,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572682987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:25,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:25,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 14:07:25,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298416371] [2021-06-05 14:07:25,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:07:25,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:25,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:07:25,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:07:25,532 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 14:07:26,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:26,582 INFO L93 Difference]: Finished difference Result 159493 states and 478171 transitions. [2021-06-05 14:07:26,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:07:26,583 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 14:07:26,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:26,955 INFO L225 Difference]: With dead ends: 159493 [2021-06-05 14:07:26,955 INFO L226 Difference]: Without dead ends: 159493 [2021-06-05 14:07:26,956 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 108.3ms TimeCoverageRelationStatistics Valid=165, Invalid=341, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:07:27,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159493 states. [2021-06-05 14:07:29,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159493 to 140825. [2021-06-05 14:07:29,648 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 14:07:30,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140825 states to 140825 states and 423612 transitions. [2021-06-05 14:07:30,010 INFO L78 Accepts]: Start accepts. Automaton has 140825 states and 423612 transitions. Word has length 25 [2021-06-05 14:07:30,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:30,010 INFO L482 AbstractCegarLoop]: Abstraction has 140825 states and 423612 transitions. [2021-06-05 14:07:30,010 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 14:07:30,010 INFO L276 IsEmpty]: Start isEmpty. Operand 140825 states and 423612 transitions. [2021-06-05 14:07:30,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:07:30,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:30,082 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:30,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 458 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20258 [2021-06-05 14:07:30,282 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:30,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:30,282 INFO L82 PathProgramCache]: Analyzing trace with hash -876030722, now seen corresponding path program 457 times [2021-06-05 14:07:30,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:30,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136932396] [2021-06-05 14:07:30,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:30,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:30,366 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 14:07:30,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:30,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136932396] [2021-06-05 14:07:30,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136932396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:30,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437464334] [2021-06-05 14:07:30,367 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 14:07:30,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:30,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:07:30,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:30,437 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 14:07:30,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437464334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:30,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:30,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-05 14:07:30,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140186730] [2021-06-05 14:07:30,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:07:30,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:30,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:07:30,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:07:30,438 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 14:07:31,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:31,725 INFO L93 Difference]: Finished difference Result 166578 states and 499146 transitions. [2021-06-05 14:07:31,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:07:31,725 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 14:07:31,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:32,085 INFO L225 Difference]: With dead ends: 166578 [2021-06-05 14:07:32,085 INFO L226 Difference]: Without dead ends: 166578 [2021-06-05 14:07:32,086 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 156.9ms TimeCoverageRelationStatistics Valid=294, Invalid=576, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:07:32,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166578 states. [2021-06-05 14:07:34,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166578 to 88690. [2021-06-05 14:07:34,624 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 14:07:34,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88690 states to 88690 states and 265773 transitions. [2021-06-05 14:07:34,848 INFO L78 Accepts]: Start accepts. Automaton has 88690 states and 265773 transitions. Word has length 25 [2021-06-05 14:07:34,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:34,848 INFO L482 AbstractCegarLoop]: Abstraction has 88690 states and 265773 transitions. [2021-06-05 14:07:34,849 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 14:07:34,849 INFO L276 IsEmpty]: Start isEmpty. Operand 88690 states and 265773 transitions. [2021-06-05 14:07:34,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:07:34,901 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:34,901 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:35,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20259,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:07:35,101 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:35,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:35,101 INFO L82 PathProgramCache]: Analyzing trace with hash -2143487900, now seen corresponding path program 458 times [2021-06-05 14:07:35,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:35,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796503464] [2021-06-05 14:07:35,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:35,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:35,190 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 14:07:35,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:35,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796503464] [2021-06-05 14:07:35,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796503464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:35,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777732374] [2021-06-05 14:07:35,191 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 14:07:35,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:07:35,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:07:35,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:07:35,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:35,261 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 14:07:35,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777732374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:35,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:35,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-05 14:07:35,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823333100] [2021-06-05 14:07:35,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:07:35,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:35,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:07:35,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:07:35,262 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 14:07:35,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:35,992 INFO L93 Difference]: Finished difference Result 132265 states and 395319 transitions. [2021-06-05 14:07:35,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 14:07:35,992 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 14:07:35,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:36,803 INFO L225 Difference]: With dead ends: 132265 [2021-06-05 14:07:36,803 INFO L226 Difference]: Without dead ends: 132265 [2021-06-05 14:07:36,803 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 245.9ms TimeCoverageRelationStatistics Valid=534, Invalid=1026, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 14:07:36,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132265 states. [2021-06-05 14:07:38,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132265 to 75005. [2021-06-05 14:07:38,658 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 14:07:38,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75005 states to 75005 states and 225277 transitions. [2021-06-05 14:07:38,838 INFO L78 Accepts]: Start accepts. Automaton has 75005 states and 225277 transitions. Word has length 25 [2021-06-05 14:07:38,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:38,838 INFO L482 AbstractCegarLoop]: Abstraction has 75005 states and 225277 transitions. [2021-06-05 14:07:38,838 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 14:07:38,838 INFO L276 IsEmpty]: Start isEmpty. Operand 75005 states and 225277 transitions. [2021-06-05 14:07:38,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:07:38,887 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:38,887 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:39,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20260,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:07:39,087 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:39,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:39,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1062601334, now seen corresponding path program 459 times [2021-06-05 14:07:39,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:39,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847035099] [2021-06-05 14:07:39,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:39,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:39,165 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 14:07:39,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:39,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847035099] [2021-06-05 14:07:39,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847035099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:39,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716398813] [2021-06-05 14:07:39,166 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 14:07:39,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 14:07:39,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:07:39,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:07:39,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:39,245 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 14:07:39,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716398813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:39,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:39,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 14:07:39,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265029977] [2021-06-05 14:07:39,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:07:39,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:39,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:07:39,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:07:39,246 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 14:07:39,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:39,915 INFO L93 Difference]: Finished difference Result 75445 states and 225722 transitions. [2021-06-05 14:07:39,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:07:39,916 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 14:07:39,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:40,053 INFO L225 Difference]: With dead ends: 75445 [2021-06-05 14:07:40,053 INFO L226 Difference]: Without dead ends: 75443 [2021-06-05 14:07:40,053 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 108.4ms TimeCoverageRelationStatistics Valid=167, Invalid=339, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:07:40,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75443 states. [2021-06-05 14:07:41,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75443 to 74587. [2021-06-05 14:07:41,409 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 14:07:41,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74587 states to 74587 states and 223933 transitions. [2021-06-05 14:07:41,590 INFO L78 Accepts]: Start accepts. Automaton has 74587 states and 223933 transitions. Word has length 25 [2021-06-05 14:07:41,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:41,590 INFO L482 AbstractCegarLoop]: Abstraction has 74587 states and 223933 transitions. [2021-06-05 14:07:41,590 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 14:07:41,591 INFO L276 IsEmpty]: Start isEmpty. Operand 74587 states and 223933 transitions. [2021-06-05 14:07:41,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:07:41,636 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:41,636 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:41,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20261 [2021-06-05 14:07:41,837 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:41,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:41,837 INFO L82 PathProgramCache]: Analyzing trace with hash 420533604, now seen corresponding path program 460 times [2021-06-05 14:07:41,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:41,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333399870] [2021-06-05 14:07:41,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:41,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:41,923 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 14:07:41,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:41,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333399870] [2021-06-05 14:07:41,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333399870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:41,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455282423] [2021-06-05 14:07:41,923 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 14:07:41,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:07:41,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:07:41,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:07:41,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:42,000 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 14:07:42,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455282423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:42,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:42,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-05 14:07:42,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130582646] [2021-06-05 14:07:42,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:07:42,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:42,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:07:42,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:07:42,001 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 14:07:42,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:42,408 INFO L93 Difference]: Finished difference Result 83574 states and 249816 transitions. [2021-06-05 14:07:42,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:07:42,408 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 14:07:42,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:42,554 INFO L225 Difference]: With dead ends: 83574 [2021-06-05 14:07:42,554 INFO L226 Difference]: Without dead ends: 83574 [2021-06-05 14:07:42,554 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 157.7ms TimeCoverageRelationStatistics Valid=297, Invalid=573, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:07:42,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83574 states. [2021-06-05 14:07:44,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83574 to 52866. [2021-06-05 14:07:44,100 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 14:07:44,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52866 states to 52866 states and 158016 transitions. [2021-06-05 14:07:44,212 INFO L78 Accepts]: Start accepts. Automaton has 52866 states and 158016 transitions. Word has length 25 [2021-06-05 14:07:44,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:44,212 INFO L482 AbstractCegarLoop]: Abstraction has 52866 states and 158016 transitions. [2021-06-05 14:07:44,212 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 14:07:44,212 INFO L276 IsEmpty]: Start isEmpty. Operand 52866 states and 158016 transitions. [2021-06-05 14:07:44,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:07:44,251 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:44,251 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:44,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 462 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20262 [2021-06-05 14:07:44,451 INFO L430 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:44,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:44,452 INFO L82 PathProgramCache]: Analyzing trace with hash -846923574, now seen corresponding path program 461 times [2021-06-05 14:07:44,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:44,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235145848] [2021-06-05 14:07:44,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:44,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:44,540 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 14:07:44,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:44,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235145848] [2021-06-05 14:07:44,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235145848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:44,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283100021] [2021-06-05 14:07:44,541 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 14:07:44,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 14:07:44,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:07:44,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:07:44,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:44,623 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 14:07:44,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283100021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:44,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:44,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-05 14:07:44,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388917933] [2021-06-05 14:07:44,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:07:44,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:44,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:07:44,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:07:44,623 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 14:07:45,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:45,137 INFO L93 Difference]: Finished difference Result 78034 states and 231687 transitions. [2021-06-05 14:07:45,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:07:45,138 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 14:07:45,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:45,282 INFO L225 Difference]: With dead ends: 78034 [2021-06-05 14:07:45,282 INFO L226 Difference]: Without dead ends: 78034 [2021-06-05 14:07:45,283 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 242.3ms TimeCoverageRelationStatistics Valid=541, Invalid=1019, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 14:07:45,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78034 states. [2021-06-05 14:07:46,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78034 to 41286. [2021-06-05 14:07:46,404 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 14:07:46,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41286 states to 41286 states and 123474 transitions. [2021-06-05 14:07:46,492 INFO L78 Accepts]: Start accepts. Automaton has 41286 states and 123474 transitions. Word has length 25 [2021-06-05 14:07:46,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:46,492 INFO L482 AbstractCegarLoop]: Abstraction has 41286 states and 123474 transitions. [2021-06-05 14:07:46,492 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 14:07:46,492 INFO L276 IsEmpty]: Start isEmpty. Operand 41286 states and 123474 transitions. [2021-06-05 14:07:46,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:07:46,528 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:46,528 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:46,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20263,463 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:07:46,729 INFO L430 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:46,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:46,729 INFO L82 PathProgramCache]: Analyzing trace with hash -41716956, now seen corresponding path program 462 times [2021-06-05 14:07:46,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:46,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745814746] [2021-06-05 14:07:46,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:46,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:46,780 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 14:07:46,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:46,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745814746] [2021-06-05 14:07:46,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745814746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:46,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086471618] [2021-06-05 14:07:46,781 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 14:07:46,808 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:07:46,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:07:46,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:07:46,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:46,847 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 14:07:46,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086471618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:46,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:46,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 14:07:46,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316918725] [2021-06-05 14:07:46,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:07:46,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:46,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:07:46,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:07:46,849 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 14:07:47,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:47,132 INFO L93 Difference]: Finished difference Result 41661 states and 123915 transitions. [2021-06-05 14:07:47,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:07:47,133 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 14:07:47,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:47,193 INFO L225 Difference]: With dead ends: 41661 [2021-06-05 14:07:47,194 INFO L226 Difference]: Without dead ends: 41657 [2021-06-05 14:07:47,194 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 112.6ms TimeCoverageRelationStatistics Valid=210, Invalid=390, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:07:47,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41657 states. [2021-06-05 14:07:47,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41657 to 41286. [2021-06-05 14:07:47,938 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 14:07:48,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41286 states to 41286 states and 123469 transitions. [2021-06-05 14:07:48,020 INFO L78 Accepts]: Start accepts. Automaton has 41286 states and 123469 transitions. Word has length 25 [2021-06-05 14:07:48,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:48,021 INFO L482 AbstractCegarLoop]: Abstraction has 41286 states and 123469 transitions. [2021-06-05 14:07:48,021 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 14:07:48,021 INFO L276 IsEmpty]: Start isEmpty. Operand 41286 states and 123469 transitions. [2021-06-05 14:07:48,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:07:48,054 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:48,054 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:48,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20264 [2021-06-05 14:07:48,255 INFO L430 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:48,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:48,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1688753060, now seen corresponding path program 463 times [2021-06-05 14:07:48,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:48,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79570325] [2021-06-05 14:07:48,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:48,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:48,344 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 14:07:48,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:48,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79570325] [2021-06-05 14:07:48,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79570325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:48,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076978593] [2021-06-05 14:07:48,345 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 14:07:48,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:48,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:07:48,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:48,434 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 14:07:48,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076978593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:48,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:48,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-05 14:07:48,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329649213] [2021-06-05 14:07:48,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:07:48,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:48,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:07:48,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:07:48,435 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 14:07:49,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:49,101 INFO L93 Difference]: Finished difference Result 67989 states and 201876 transitions. [2021-06-05 14:07:49,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:07:49,102 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 14:07:49,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:49,220 INFO L225 Difference]: With dead ends: 67989 [2021-06-05 14:07:49,221 INFO L226 Difference]: Without dead ends: 67989 [2021-06-05 14:07:49,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 219.6ms TimeCoverageRelationStatistics Valid=460, Invalid=872, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 14:07:49,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67989 states. [2021-06-05 14:07:50,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67989 to 60015. [2021-06-05 14:07:50,344 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 14:07:50,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60015 states to 60015 states and 179705 transitions. [2021-06-05 14:07:50,490 INFO L78 Accepts]: Start accepts. Automaton has 60015 states and 179705 transitions. Word has length 25 [2021-06-05 14:07:50,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:50,490 INFO L482 AbstractCegarLoop]: Abstraction has 60015 states and 179705 transitions. [2021-06-05 14:07:50,490 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 14:07:50,490 INFO L276 IsEmpty]: Start isEmpty. Operand 60015 states and 179705 transitions. [2021-06-05 14:07:50,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:07:50,533 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:50,533 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:50,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20265,465 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:07:50,733 INFO L430 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:50,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:50,734 INFO L82 PathProgramCache]: Analyzing trace with hash 963120774, now seen corresponding path program 464 times [2021-06-05 14:07:50,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:50,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170375735] [2021-06-05 14:07:50,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:50,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:50,792 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 14:07:50,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:50,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170375735] [2021-06-05 14:07:50,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170375735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:50,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271098189] [2021-06-05 14:07:50,792 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 14:07:50,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:07:50,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:07:50,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:07:50,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:50,857 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 14:07:50,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271098189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:50,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:50,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:07:50,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484399701] [2021-06-05 14:07:50,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:07:50,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:50,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:07:50,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:07:50,858 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 14:07:51,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:51,218 INFO L93 Difference]: Finished difference Result 60480 states and 180320 transitions. [2021-06-05 14:07:51,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:07:51,218 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 14:07:51,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:51,330 INFO L225 Difference]: With dead ends: 60480 [2021-06-05 14:07:51,331 INFO L226 Difference]: Without dead ends: 60476 [2021-06-05 14:07:51,331 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 117.6ms TimeCoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:07:51,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60476 states. [2021-06-05 14:07:52,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60476 to 60031. [2021-06-05 14:07:52,749 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 14:07:52,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60031 states to 60031 states and 179730 transitions. [2021-06-05 14:07:52,886 INFO L78 Accepts]: Start accepts. Automaton has 60031 states and 179730 transitions. Word has length 25 [2021-06-05 14:07:52,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:52,886 INFO L482 AbstractCegarLoop]: Abstraction has 60031 states and 179730 transitions. [2021-06-05 14:07:52,886 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 14:07:52,886 INFO L276 IsEmpty]: Start isEmpty. Operand 60031 states and 179730 transitions. [2021-06-05 14:07:52,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:07:52,930 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:52,930 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:53,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 466 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20266 [2021-06-05 14:07:53,130 INFO L430 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:53,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:53,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1614097462, now seen corresponding path program 465 times [2021-06-05 14:07:53,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:53,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023737698] [2021-06-05 14:07:53,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:53,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:53,189 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 14:07:53,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:53,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023737698] [2021-06-05 14:07:53,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023737698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:53,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203501308] [2021-06-05 14:07:53,189 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 14:07:53,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:07:53,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:07:53,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:07:53,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:53,261 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 14:07:53,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203501308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:53,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:53,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 14:07:53,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22928467] [2021-06-05 14:07:53,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:07:53,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:53,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:07:53,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:07:53,262 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 14:07:53,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:53,571 INFO L93 Difference]: Finished difference Result 65631 states and 195205 transitions. [2021-06-05 14:07:53,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:07:53,571 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 14:07:53,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:54,123 INFO L225 Difference]: With dead ends: 65631 [2021-06-05 14:07:54,124 INFO L226 Difference]: Without dead ends: 65631 [2021-06-05 14:07:54,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 84.5ms TimeCoverageRelationStatistics Valid=170, Invalid=250, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:07:54,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65631 states. [2021-06-05 14:07:55,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65631 to 60041. [2021-06-05 14:07:55,244 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 14:07:55,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60041 states to 60041 states and 179756 transitions. [2021-06-05 14:07:55,386 INFO L78 Accepts]: Start accepts. Automaton has 60041 states and 179756 transitions. Word has length 25 [2021-06-05 14:07:55,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:55,386 INFO L482 AbstractCegarLoop]: Abstraction has 60041 states and 179756 transitions. [2021-06-05 14:07:55,386 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 14:07:55,386 INFO L276 IsEmpty]: Start isEmpty. Operand 60041 states and 179756 transitions. [2021-06-05 14:07:55,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:07:55,433 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:55,433 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:55,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20267,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:07:55,633 INFO L430 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:55,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:55,634 INFO L82 PathProgramCache]: Analyzing trace with hash 951822500, now seen corresponding path program 466 times [2021-06-05 14:07:55,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:55,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767363814] [2021-06-05 14:07:55,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:55,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:55,695 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 14:07:55,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:55,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767363814] [2021-06-05 14:07:55,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767363814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:55,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225188476] [2021-06-05 14:07:55,695 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 14:07:55,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:07:55,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:07:55,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:07:55,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:55,771 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 14:07:55,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225188476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:55,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:55,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 14:07:55,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412623539] [2021-06-05 14:07:55,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:07:55,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:55,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:07:55,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:07:55,772 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 14:07:56,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:56,126 INFO L93 Difference]: Finished difference Result 70196 states and 208624 transitions. [2021-06-05 14:07:56,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:07:56,127 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 14:07:56,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:56,261 INFO L225 Difference]: With dead ends: 70196 [2021-06-05 14:07:56,261 INFO L226 Difference]: Without dead ends: 70196 [2021-06-05 14:07:56,261 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 118.9ms TimeCoverageRelationStatistics Valid=248, Invalid=402, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:07:56,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70196 states. [2021-06-05 14:07:57,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70196 to 60079. [2021-06-05 14:07:57,529 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 14:07:57,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60079 states to 60079 states and 179870 transitions. [2021-06-05 14:07:57,673 INFO L78 Accepts]: Start accepts. Automaton has 60079 states and 179870 transitions. Word has length 25 [2021-06-05 14:07:57,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:07:57,673 INFO L482 AbstractCegarLoop]: Abstraction has 60079 states and 179870 transitions. [2021-06-05 14:07:57,673 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 14:07:57,674 INFO L276 IsEmpty]: Start isEmpty. Operand 60079 states and 179870 transitions. [2021-06-05 14:07:57,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:07:57,717 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:07:57,717 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:07:57,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 468 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20268 [2021-06-05 14:07:57,917 INFO L430 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:07:57,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:07:57,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1109037302, now seen corresponding path program 467 times [2021-06-05 14:07:57,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:07:57,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296804812] [2021-06-05 14:07:57,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:07:57,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:07:57,983 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 14:07:57,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:07:57,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296804812] [2021-06-05 14:07:57,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296804812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:57,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723958821] [2021-06-05 14:07:57,984 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 14:07:58,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 14:07:58,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:07:58,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:07:58,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:07:58,063 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 14:07:58,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723958821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:07:58,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:07:58,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:07:58,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328885546] [2021-06-05 14:07:58,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:07:58,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:07:58,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:07:58,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:07:58,064 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 14:07:58,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:07:58,824 INFO L93 Difference]: Finished difference Result 72590 states and 215734 transitions. [2021-06-05 14:07:58,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:07:58,824 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 14:07:58,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:07:58,959 INFO L225 Difference]: With dead ends: 72590 [2021-06-05 14:07:58,959 INFO L226 Difference]: Without dead ends: 72590 [2021-06-05 14:07:58,959 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 139.8ms TimeCoverageRelationStatistics Valid=302, Invalid=510, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:07:59,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72590 states. [2021-06-05 14:08:00,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72590 to 59829. [2021-06-05 14:08:00,155 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 14:08:00,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59829 states to 59829 states and 179071 transitions. [2021-06-05 14:08:00,300 INFO L78 Accepts]: Start accepts. Automaton has 59829 states and 179071 transitions. Word has length 25 [2021-06-05 14:08:00,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:00,300 INFO L482 AbstractCegarLoop]: Abstraction has 59829 states and 179071 transitions. [2021-06-05 14:08:00,300 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 14:08:00,300 INFO L276 IsEmpty]: Start isEmpty. Operand 59829 states and 179071 transitions. [2021-06-05 14:08:00,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:08:00,350 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:00,351 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:00,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20269,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:00,551 INFO L430 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:00,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:00,551 INFO L82 PathProgramCache]: Analyzing trace with hash -571181724, now seen corresponding path program 468 times [2021-06-05 14:08:00,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:00,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106531483] [2021-06-05 14:08:00,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:00,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:00,622 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 14:08:00,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:00,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106531483] [2021-06-05 14:08:00,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106531483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:00,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177242335] [2021-06-05 14:08:00,622 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 14:08:00,651 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 14:08:00,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:00,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:08:00,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:00,701 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 14:08:00,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177242335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:00,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:00,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 14:08:00,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757736269] [2021-06-05 14:08:00,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:08:00,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:00,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:08:00,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:08:00,702 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 14:08:01,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:01,156 INFO L93 Difference]: Finished difference Result 93593 states and 280293 transitions. [2021-06-05 14:08:01,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:08:01,157 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 14:08:01,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:01,332 INFO L225 Difference]: With dead ends: 93593 [2021-06-05 14:08:01,332 INFO L226 Difference]: Without dead ends: 93593 [2021-06-05 14:08:01,332 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 149.2ms TimeCoverageRelationStatistics Valid=293, Invalid=519, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:08:01,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93593 states. [2021-06-05 14:08:03,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93593 to 82993. [2021-06-05 14:08:03,256 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 14:08:03,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82993 states to 82993 states and 250327 transitions. [2021-06-05 14:08:03,481 INFO L78 Accepts]: Start accepts. Automaton has 82993 states and 250327 transitions. Word has length 25 [2021-06-05 14:08:03,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:03,481 INFO L482 AbstractCegarLoop]: Abstraction has 82993 states and 250327 transitions. [2021-06-05 14:08:03,481 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 14:08:03,481 INFO L276 IsEmpty]: Start isEmpty. Operand 82993 states and 250327 transitions. [2021-06-05 14:08:03,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:08:03,539 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:03,539 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:03,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20270,470 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:03,753 INFO L430 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:03,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:03,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1077527990, now seen corresponding path program 469 times [2021-06-05 14:08:03,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:03,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885813081] [2021-06-05 14:08:03,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:03,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:03,832 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 14:08:03,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:03,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885813081] [2021-06-05 14:08:03,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885813081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:03,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342849078] [2021-06-05 14:08:03,832 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 14:08:03,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:03,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:08:03,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:03,908 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 14:08:03,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342849078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:03,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:03,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 14:08:03,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800146032] [2021-06-05 14:08:03,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:08:03,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:03,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:08:03,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:08:03,909 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 14:08:04,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:04,363 INFO L93 Difference]: Finished difference Result 90382 states and 270822 transitions. [2021-06-05 14:08:04,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:08:04,363 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 14:08:04,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:04,555 INFO L225 Difference]: With dead ends: 90382 [2021-06-05 14:08:04,555 INFO L226 Difference]: Without dead ends: 90382 [2021-06-05 14:08:04,555 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 144.6ms TimeCoverageRelationStatistics Valid=262, Invalid=494, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:08:04,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90382 states. [2021-06-05 14:08:06,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90382 to 81151. [2021-06-05 14:08:06,182 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 14:08:06,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81151 states to 81151 states and 244631 transitions. [2021-06-05 14:08:06,840 INFO L78 Accepts]: Start accepts. Automaton has 81151 states and 244631 transitions. Word has length 25 [2021-06-05 14:08:06,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:06,841 INFO L482 AbstractCegarLoop]: Abstraction has 81151 states and 244631 transitions. [2021-06-05 14:08:06,841 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 14:08:06,841 INFO L276 IsEmpty]: Start isEmpty. Operand 81151 states and 244631 transitions. [2021-06-05 14:08:06,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:08:06,895 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:06,895 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:07,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20271 [2021-06-05 14:08:07,095 INFO L430 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:07,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:07,096 INFO L82 PathProgramCache]: Analyzing trace with hash 405606948, now seen corresponding path program 470 times [2021-06-05 14:08:07,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:07,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617403091] [2021-06-05 14:08:07,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:07,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:07,178 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 14:08:07,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:07,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617403091] [2021-06-05 14:08:07,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617403091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:07,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773360732] [2021-06-05 14:08:07,178 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 14:08:07,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:08:07,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:07,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:08:07,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:07,256 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 14:08:07,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773360732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:07,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:07,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 14:08:07,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559139089] [2021-06-05 14:08:07,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:08:07,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:07,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:08:07,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:08:07,257 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 14:08:07,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:07,872 INFO L93 Difference]: Finished difference Result 141608 states and 426442 transitions. [2021-06-05 14:08:07,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:08:07,873 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 14:08:07,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:08,202 INFO L225 Difference]: With dead ends: 141608 [2021-06-05 14:08:08,202 INFO L226 Difference]: Without dead ends: 141608 [2021-06-05 14:08:08,203 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 135.3ms TimeCoverageRelationStatistics Valid=206, Invalid=444, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:08:08,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141608 states. [2021-06-05 14:08:10,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141608 to 133805. [2021-06-05 14:08:10,957 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 14:08:11,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133805 states to 133805 states and 404405 transitions. [2021-06-05 14:08:11,316 INFO L78 Accepts]: Start accepts. Automaton has 133805 states and 404405 transitions. Word has length 25 [2021-06-05 14:08:11,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:11,317 INFO L482 AbstractCegarLoop]: Abstraction has 133805 states and 404405 transitions. [2021-06-05 14:08:11,317 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 14:08:11,317 INFO L276 IsEmpty]: Start isEmpty. Operand 133805 states and 404405 transitions. [2021-06-05 14:08:11,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:08:11,396 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:11,396 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:11,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20272,472 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:11,597 INFO L430 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:11,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:11,597 INFO L82 PathProgramCache]: Analyzing trace with hash -861850230, now seen corresponding path program 471 times [2021-06-05 14:08:11,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:11,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646839629] [2021-06-05 14:08:11,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:11,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:12,213 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 14:08:12,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:12,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646839629] [2021-06-05 14:08:12,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646839629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:12,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101394655] [2021-06-05 14:08:12,214 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 14:08:12,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 14:08:12,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:12,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 14:08:12,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:12,340 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 14:08:12,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101394655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:12,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:12,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-05 14:08:12,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409770806] [2021-06-05 14:08:12,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:08:12,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:12,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:08:12,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:08:12,341 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) Received shutdown request... [2021-06-05 14:08:12,511 WARN L222 SmtUtils]: Removed 3 from assertion stack [2021-06-05 14:08:12,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:08:12,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20273,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:12,712 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 14:08:12,713 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 14:08:12,715 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 14:08:12,715 INFO L202 PluginConnector]: Adding new model unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 02:08:12 BasicIcfg [2021-06-05 14:08:12,715 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 14:08:12,715 INFO L168 Benchmark]: Toolchain (without parser) took 855464.44 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 13.4 GB in the end (delta: -13.1 GB). Peak memory consumption was 2.6 GB. Max. memory is 16.0 GB. [2021-06-05 14:08:12,716 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 367.0 MB. Free memory is still 347.7 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 14:08:12,716 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.41 ms. Allocated memory is still 367.0 MB. Free memory was 346.4 MB in the beginning and 344.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 14:08:12,716 INFO L168 Benchmark]: Boogie Preprocessor took 14.42 ms. Allocated memory is still 367.0 MB. Free memory was 344.9 MB in the beginning and 344.0 MB in the end (delta: 927.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 14:08:12,716 INFO L168 Benchmark]: RCFGBuilder took 273.04 ms. Allocated memory is still 367.0 MB. Free memory was 344.0 MB in the beginning and 330.2 MB in the end (delta: 13.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-05 14:08:12,716 INFO L168 Benchmark]: TraceAbstraction took 855136.99 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 13.4 GB in the end (delta: -13.1 GB). Peak memory consumption was 2.6 GB. Max. memory is 16.0 GB. [2021-06-05 14:08:12,716 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 0.15 ms. Allocated memory is still 367.0 MB. Free memory is still 347.7 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 29.41 ms. Allocated memory is still 367.0 MB. Free memory was 346.4 MB in the beginning and 344.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.42 ms. Allocated memory is still 367.0 MB. Free memory was 344.9 MB in the beginning and 344.0 MB in the end (delta: 927.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 273.04 ms. Allocated memory is still 367.0 MB. Free memory was 344.0 MB in the beginning and 330.2 MB in the end (delta: 13.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 855136.99 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 13.4 GB in the end (delta: -13.1 GB). Peak memory consumption was 2.6 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 48]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (133805states) and FLOYD_HOARE automaton (currently 21 states, 19 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 9 for 1ms.. - TimeoutResultAtElement [Line: 48]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (133805states) and FLOYD_HOARE automaton (currently 21 states, 19 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 9 for 1ms.. - TimeoutResultAtElement [Line: 53]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (133805states) and FLOYD_HOARE automaton (currently 21 states, 19 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 9 for 1ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 20 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 855038.0ms, OverallIterations: 475, TraceHistogramMax: 11, EmptinessCheckTime: 7364.1ms, AutomataDifference: 126220.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 15.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 9765 SDtfs, 40551 SDslu, 63294 SDs, 0 SdLazy, 73558 SolverSat, 13325 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 30356.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20242 GetRequests, 9632 SyntacticMatches, 223 SemanticMatches, 10386 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65690 ImplicationChecksByTransitivity, 66214.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=269074occurred in iteration=456, InterpolantAutomatonStates: 9276, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 160823.4ms AutomataMinimizationTime, 474 MinimizatonAttempts, 1143807 StatesRemovedByMinimization, 470 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1543.4ms SsaConstructionTime, 5476.9ms SatisfiabilityAnalysisTime, 447167.4ms InterpolantComputationTime, 19819 NumberOfCodeBlocks, 19813 NumberOfCodeBlocksAsserted, 2091 NumberOfCheckSat, 18872 ConstructedInterpolants, 0 QuantifiedInterpolants, 86148 SizeOfPredicates, 273 NumberOfNonLiveVariables, 40477 ConjunctsInSsa, 7073 ConjunctsInUnsatCore, 947 InterpolantComputations, 3 PerfectInterpolantSequences, 18329/45914 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